Emerson MCU900 User Manual

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Mobrey MCU900 Series

4–20 mA + HART® Compatible Controller

Reference Manual

IP2030/RM, Rev AA

June 2014

Reference Manual

IP2030/RM, Rev AA

Title Page

June 2014

Mobrey MCU900 Series Universal Control Unit

Read this manual before working with the product. For personal and system safety, and for optimum product performance,

make sure you thoroughly understand the contents before installing, using, or maintaining this product.

For the latest customer support information, visit the Mobrey brand pages at www.emersonprocess.com, and then click on the Mobrey Service or Product Support quick links.

The products described in this document are NOT designed for nuclear-qualified applications.

Using non-nuclear qualified products in applications that require nuclear-qualified hardware or products may cause inaccurate readings.

For information on Rosemount nuclear-qualified products, contact an Emerson Process Management Sales Representative.

Replacement equipment or spare parts not approved by Emerson for use as spare parts could reduce the capabilities of the Mobrey MCU900 Series control unit, and may render the instrument dangerous.

 Use spare parts supplied or sold by Emerson

Reference Manual

IP2030/RM, Rev AA

1Section 1: Introduction

1.1 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.2 Manual overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.3 Control unit versions and software releases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.4 Customer support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.5 Product recycling/disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2Section 2: Control Unit Overview

2.1 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2.2 About the Mobrey MCU900 Series Control Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2.2.1 Wall and panel mounting options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

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2.2.2 4–20mA HART transmitter input options . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.2.3 Control functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.3 Control unit functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.3.1 Standard functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.3.2 Difference, sum, and product functions (on MCU902 only) . . . . . . . . . . .5

2.3.3 Data logging functions (on MCU90F only) . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.4 Control unit front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

2.4.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.4.2 Status LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

2.4.3 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

3Section 3: Installation

3.1 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

3.2 Considerations before installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.2.1 Safety considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

3.3 Mounting the control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.3.1 Mounting the wall-mount version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

3.3.2 Mounting the panel version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

3.4 Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.4.1 Making electrical connections on wall-mount units . . . . . . . . . . . . . . . . .13

Tab le of C ontents

3.4.2 Making electrical connections on panel-mount units . . . . . . . . . . . . . . . .15

3.4.3 Power connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

3.4.4 Earthing connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

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3.4.5 Transmitter connections and cabling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

3.4.6 Connecting HART transmitters to the Mobrey MCU902 . . . . . . . . . . . . .18

3.4.7 Relay connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3.4.8 Current output connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3.4.9 Digital control voltage-free contact inputs. . . . . . . . . . . . . . . . . . . . . . . . .21

3.4.10 RS232 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

4Section 4: Getting started

4.1 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.2 Switching on the MCU901 and MCU90F for the first time . . . . . . . . . . . . . . . . . . 26

4.2.1 Switching on with one new HART transmitter connected . . . . . . . . . . . .27

4.2.2 Switching on with one 4–20 mA transmitter connected . . . . . . . . . . . . .29

4.3 Switching on the MCU902 for the first time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.4 A quick tour of the menu system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.5 Programming the control unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.5.1 The basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

4.5.2 Step-by-step programming of the control unit . . . . . . . . . . . . . . . . . . . . .37

4.5.3 Run App and Program operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . .38

4.5.4 Application Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

4.5.5 Optional change: system settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

4.5.6 Optional change:

transmitter input channel settings (advanced users) . . . . . . . . . . . . . . . .43

4.5.7 Programming Input Channel 1 for a 4–20 mA input

(advanced users) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

4.5.8 Programming Channel 1 for a HART input (advanced users). . . . . . . . . .48

4.5.9 Programming Channel 2 for a HART input (MCU902 only)

(advanced users) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

4.5.10 Volumetric contents and flow measurement applications

(advanced users) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

4.5.11 Set-up the volumetric contents calculations for a

popular linear / uniform vessel (advanced users). . . . . . . . . . . . . . . . . . . .52

4.5.12 Set-up the volumetric contents calculations for a popular

non-linear / non-uniform shaped vessel (advanced users). . . . . . . . . . . .53

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4.5.13 Set-up flow calculations for non-linear / non-uniform

open channel profiles (advanced users) . . . . . . . . . . . . . . . . . . . . . . . . . . .56

4.5.14 Set-up open channel flow calculations for pre-programmed flat,

parabolic, and Parshall flumes (advanced users) . . . . . . . . . . . . . . . . . . . .58

4.5.15 Set-up Kindsvater Shen (V-notch ISO1438) flow calculations. . . . . . . . .59

4.5.16 Set-up exponential flow law calculations . . . . . . . . . . . . . . . . . . . . . . . . . .59

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4.5.17 Using a plotted profile for calculating volume or flow . . . . . . . . . . . . . . .61

4.5.18 Digital inputs IN1 and IN2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

4.5.19 Data logging on the Mobrey MCU90F . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

4.5.20 Set-up the current output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

4.5.21 Set-up the relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

4.5.22 Set-up alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

4.5.23 Set-up totalizing on the Mobrey MCU901 control unit. . . . . . . . . . . . . . .95

4.5.24 Set-up totalizing on the Mobrey MCU902 control unit. . . . . . . . . . . . . . .97

4.5.25 Set-up totalizing on the Mobrey MCU90F control unit . . . . . . . . . . . . . . .99

4.5.26 Display configuration options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

4.5.27 Serial communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

4.5.28 PIN Security. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

5Section 5: Servicing and Health Checking

5.1 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

5.2 Servicing the MCU900 Series control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

5.2.1 Replacing the fuse on mains ac-powered control units . . . . . . . . . . . . 108

5.3 Health checking the MCU900 Series control unit . . . . . . . . . . . . . . . . . . . . . . . . 110

5.3.1 Simulation (self-test). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

5.3.2 Display test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

5.3.3 Calibration of the Current Input (I

5.3.4 Fixing the Current Output (I

out

5.3.5 Calibration of the Current Output (I

). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

). . . . . . . . . . . . . . . . . . . . . . . . . . 112

out

5.3.6 Monitoring the control unit readings. . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

5.3.7 Diagnostic data for the MCU900 Series control unit . . . . . . . . . . . . . . . 115

5.3.8 Model code, serial number, and software and hardware revisions. . . 116

AAppendix A: Reference Data

A.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

A.1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

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A.1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

A.1.3 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

A.1.4 Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

A.1.5 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

A.2 Dimensional drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

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BAppendix B: Product Certifications

B.1 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

B.2 European directive information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

B.3 Hazardous locations certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

B.3.1 ATEX intrinsically safe approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

B.3.2 IECEx intrinsically safe approvals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

CAppendix C: Menus and Parameters

C.1 Menus and parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

DAppendix D: Additional Features

D.1 Restoring the factory defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

D.1.1 How to restore the factory default settings . . . . . . . . . . . . . . . . . . . . . . 135

D.2 ADVANCED parameter access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

EAppendix E: Support for HART® Transmitters

E.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

E.2 Fully supported HART transmitters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

E.3 Generic support for HART transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

E.3.1 Compatibility between transmitter and control unit . . . . . . . . . . . . . . 139

E.3.2 Universal and common practice commands . . . . . . . . . . . . . . . . . . . . . 140

6Index

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Table of Contents

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Section 1 Introduction

Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1

Manual overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2

Control unit versions and software releases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2

Customer support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2

Product recycling/disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2

1.1 Safety messages

Procedures and instructions in this manual may require special precautions to ensure the safety of the personnel performing the operations. Information that raises potential safety issues is

indicated by a caution symbol ( ). The external hot surface symbol ( ) is used when a surface is hot and care must be taken to avoid possible burns. If there is a risk of an electrical shock the

( ) symbol is used. Refer to the safety messages listed at the beginning of each section before performing an operation preceded by this symbol.

Section 1: Introduction

June 2014

Failure to follow these installation guidelines could result in death or serious injury:

 The Mobrey MCU900 Series Control Unit must be installed, connected,

commissioned, operated, and maintained by suitably qualified personnel only, observing any national and local requirements that may apply

 Use the equipment only as specified in this manual. Failure to do so may impair the

protection provided by the equipment

Explosions could result in death or serious injury:

 Please review the approvals section of this reference manual for any restrictions

associated with an installation

Electrical shock could cause death or serious injury:

 If the control unit is installed in a high voltage environment and a fault condition or

installation error occurs, high voltage may be present on leads and terminals

 Use extreme caution when making contact with the leads and terminals  Make sure that power to the control unit is off while making connections

Section 1: Introduction

June 2014

1.2 Manual overview

This manual provides installation, configuration and maintenance information for the Mobrey MCU900 Series control unit.

Section 2: Control Unit Overview

Section 3: Installation

Section 4: Getting started

Section 5: Servicing and Health Checking

Appendix A: Reference Data

Appendix B: Product Certifications

Appendix C: Menus and Parameters

Appendix D: Additional Features

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Appendix E: Support for HART® Transmitters

1.3 Control unit versions and software releases

The following control unit versions are covered in this product manual:

 Mobrey MCU901 Standard Control Unit

 Mobrey MCU902 Differential Control Unit

 Mobrey MCU90F Logging Control Unit

The software release covered in this product manual is issue 4.00.00 (and above).

1.4 Customer support

For the latest customer support information, visit the Mobrey brand pages at www.emersonprocess.com, and then click on the Mobrey Service or Product Support

quick links.

1.5 Product recycling/disposal

Recycling of equipment and packaging should be taken into consideration. The product and packaging should be disposed of in accordance with local and national legislation.

Section 1: Introduction2

Reference Manual

Wall Mount

Panel Mount

IP2030/RM, Rev AA

Section 2: Control Unit Overview

Section 2 Control Unit Overview

Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3

About the Mobrey MCU900 Series Control Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3

Control unit functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5

Control unit front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6

2.1 Safety messages

Procedures and instructions in this manual may require special precautions to ensure the safety of the personnel performing the operations. Information that raises potential safety issues is

indicated by a caution symbol ( ). The external hot surface symbol ( ) is used when a surface is hot and care must be taken to avoid possible burns. If there is a risk of an electrical shock the

( ) symbol is used. Refer to the safety messages listed at the beginning of each section before performing an operation preceded by this symbol.

June 2014

2.2 About the Mobrey MCU900 Series Control Unit

Note

 A full specification for the control unit is in Appendix A: Reference Data.

2.2.1 Wall and panel mounting options

The wall mounting option has a tough, weatherproof enclosure for internal or external installation.

The panel mounting option has a black enclosure, and is designed for control room panel or cabinet installation.

Figure 2-1. Mounting options

Section 2: Control Unit Overview

20mA

4mA

June 2014

2.2.2 4–20mA HART transmitter input options

4–20mA HART transmitter input options:

 The Mobrey MCU901 Standard control unit and the Mobrey MCU90F Logging control

unit accepts one 4–20mA or HART transmitter input

 The Mobrey MCU902 Differential control unit accepts two HART transmitter inputs

Note

 The Mobrey MCU900 Series is designed for non-hazardous (safe) area installation, but

can be connected to a transmitter installed in a hazardous area. See Appendix B: Product Certifications for the control unit certifications.

2.2.3 Control functionality

Control functionality is provided by five SPDT voltage-free contact relays in the control unit (see Figure 2-2 on page 4). The five relay outputs are fully field adjustable to perform a wide variety of control, fault indication, or alarm duties.

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For applications where the control unit functionality is linked to other external events, there are two digital input ports for accepting contact closure signals.

The isolated 4–20 mA signal output from the Current Output of the control unit is driven by a Primary / Process Value (PV) e.g. level.

Figure 2-2. Typical application using a Mobrey MCU900 Series control unit

A. Mobrey MSP Series Level Transmitter E. Pump B. Mobrey MCU900 Series Control Unit F. Transmitter Bottom Reference C. 4–20 mA signal output G. 4–20 mA and HART signal input D. Relay

Section 2: Control Unit Overview4

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2.3 Control unit functions

2.3.1 Standard functions

The Mobrey MCU900 Series control unit provides these standard functions:

 Calculation and display of the control unit Primary / Process Value (PV)

The control unit PV is typically a live transmitter reading, which can be any measured value e.g. level, temperature, or pressure.

Alternatively, the control unit PV is a volume or flow value calculated using the live transmitter level reading. The control unit is pre-programmed with standard tank shapes and flow algorithms to simplify the configuration for calculating volume or flow from the live transmitter level reading. A 20-point programmable look-up table is provided for non-standard applications.

 Output of measured variable as an isolated 4–20mA signal

The output signal is driven by the control unit Primary / Process Value (PV).

 Relay control functions

There are five freely assignable relay outputs. By default, Relay 5 is a fault relay but can be assigned to a control duty. The other relays are available to operate at user-entered PV values.

Section 2: Control Unit Overview

June 2014

The control unit is pre-programmed with popular pump control routines for wet well and sump control, along with energy saving overrides.

 Voltage-free (digital) contact closure inputs

There are two digital input ports for accepting contact closure signals to override control unit functions.

 HART transmitter interrogation and programming

Any HART transmitter can be connected. The control unit recognizes the transmitter as an “unknown instrument” but supports the Universal and Common Practice HART commands (see Appendix E: Support for HART® Transmitters).

When a Mobrey MSP Series HART transmitter is connected, the control unit recognizes the transmitter and allows full access to the transmitter’s configuration parameters. Refer to the reference manual of the transmitter for full information about programming the transmitter parameters (e.g. Transmitter Bottom Reference) using the MCU900 Series control unit or other HART-based devices.

2.3.2 Difference, sum, and product functions (on MCU902 only)

The Mobrey MCU902 Differential control unit has all the functions of the standard control unit, plus extra functions for calculating the difference, sum, or product of two separate inputs from HART transmitters.

2.3.3 Data logging functions (on MCU90F only)

The Mobrey MCU90F Logging control unit has all the functions of the standard control unit, plus a 7000 event logging function.

Section 2: Control Unit Overview

1.572 m

Esc

12:47

RL1 RL2 RL3 RL4

IN1 IN2

RL5

MCU

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2.4 Control unit front panel

This front panel fascia has an integral keypad, display, and health status LED.

Figure 2-3. Front panel fascia

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A. 4-line Back-lit LCD Display B. Status LED C. Keypad

2.4.1 Keypad

The membrane keypad has six function buttons (Ta bl e 2 - 1 ). The buttons are used for navigating a menu system and for viewing or changing application parameters.

Table 2-1. Keypad Function Buttons

Button What the button will do

When the Primary / Process Value (PV) is shown, use the red (ENTER) button to access the menu system. At other times, this button is for selecting a menu option and for confirming something.

When navigating the menu system, the UP-ARROW button is for moving upwards one line. At other times, this button is for scrolling through a list of alphanumeric characters or a list of options.

When navigating the menu system, the DOWN-ARROW button is for moving downwards one line. At other times, this button is for scrolling through a list of alphanumeric characters or a list of options.

The LEFT-ARROW button is for moving left e.g. to another character when editing a parameter value.

The RIGHT-ARROW button is for moving right e.g. to another character when editing a parameter value.

When navigating the menu system, use the ESCAPE button to return to a previous menu level and the Full PV Display. At other times, e.g. while editing, the button is for restoring a setting that is being edited.

2.4.2 Status LED

The LED is positioned just below the LCD (Figure 2-3 on page 6). It flashes once per second to indicate that the control unit and transmitters are operating correctly. The LED is constantly lit if there are operating difficulties e.g. a transmitter fault.

Section 2: Control Unit Overview6

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Mobrey MCU901

Mobrey MCU902

Mobrey MCU90F

IP2030/RM, Rev AA

2.4.3 Display

After the power-up and self-checks are completed, the Full PV Display is presented. The default Full PV Display typically features a digital clock, a measured variable with display units, and status icons. There are some display differences between control units:

 On the MCU901 and MCU902, a bar graph indicates the 4–20mA output signal.

(The MCU90F display can be changed to show the bar graph).

 On the MCU902, an extra icon on the first line and indicates if one or two HART

transmitters connected to the control unit.

 On the MCU90F, there are two totalizers displayed; one above and one below the

control unit Primary / Process Value (PV).

Figure 2-4. Typical displays of the MCU901, MCU902, and MCU90F

Section 2: Control Unit Overview

June 2014

A. Program/Run App mode (locked padlock = Run App mode) H. HART Transmitter Communicating B. HART Transmitter Communicating (absent if Idle) (1=Tx1, 2=Tx2) C. Relay (RL) Status: O = De-energized,

A = Alarm, S = Sampler, T = Totalizer A = Alarm, S = Sampler, T = Totalizer D. Primary / Process Value (PV) of Control Unit J. Totalizer 1 E. Bar graph of 4–20mA Output K. Totalizer 2 (Daily Total) F. Digital Input Status: O = Open, G. HART Transmitter Allocated:

Left Vertical Bar = Tx1; Right Vertical Bar = Tx2

Section 2: Control Unit Overview

= Energized, I. Relay (RL) Status: O = De-energized,= Energized,

= Closed

Section 2: Control Unit Overview

1.572 m

12:47

Full PV Display

Large PV Display

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After a period of keypad inactivity, the display automatically changes to the Large PV Display. This shows only the control unit Primary / Process Value (PV) and Display units, but in a larger character size to facilitate easier viewing.

To restore the Full PV Display, press the red (ENTER) button.

Note

 The Large PV Display feature can be switched off using parameter P574.

See “Display configuration options” on page 102.

Figure 2-5. Large PV Display

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Section 2: Control Unit Overview8

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Section 3 Installation

Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 9

Considerations before installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 10

Mounting the control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 11

Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 13

3.1 Safety messages

Procedures and instructions in this manual may require special precautions to ensure the safety of the personnel performing the operations. Information that raises potential safety issues is

indicated by a caution symbol ( ). The external hot surface symbol ( ) is used when a surface is hot and care must be taken to avoid possible burns. If there is a risk of an electrical shock the

( ) symbol is used. Refer to the safety messages listed at the beginning of each section before performing an operation preceded by this symbol.

Section 3: Installation

June 2014

Failure to follow these installation guidelines could result in death or serious injury:

 The Mobrey MCU900 Series control unit must be installed, connected,

commissioned, operated, and maintained by suitably qualified personnel only, observing any national and local requirements that may apply

 Use the equipment only as specified in this manual. Failure to do so may impair the

protection provided by the equipment

Explosions could result in death or serious injury:

 Please review the approvals section of this reference manual for any restrictions

associated with an installation

Electrical shock could cause death or serious injury:

 If the control unit is installed in a high voltage environment and a fault condition or

installation error occurs, high voltage may be present on leads and terminals

 Use extreme caution when making contact with the leads and terminals

 Make sure that power to the control unit is off while making connections

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June 2014

3.2 Considerations before installation

Note

The Mobrey MCU900 Series is designed for non-hazardous (safe) area installation, but can power and take input from an intrinsically safe transmitter installed in a hazardous area. See Appendix B: Product Certifications for the control unit certifications.

3.2.1 Safety considerations

Guidelines

1. This product is classified type A in accordance with European EMC directive 2004/108/EC. To ensure electro-magnetic compatibility, in any member country, this product should not be installed in a residential area.

2. Do not mount the control unit on a structure that is subject to vibration, or in a position where damage may be caused by impact, thermal stress or liquid ingress.

3. The fuse must only be replaced with the type specified (see page 108 for procedure).

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IP2030/RM, Rev AA

4. If the equipment is likely to come into contact with aggressive substances, it is the responsibility of the user to take suitable precautions that prevent it from being adversely affected, thus ensuring that the type of protection is not compromised.

Aggressive Substances - e.g. acidic liquids or gases that may attack metals or solvents that may affect polymeric materials.

Suitable Precautions - e.g. regular checks as part of routine inspections or establishing from the material's data sheet that it is resistant to specific chemicals.

5. The user should not repair this equipment.

6. Terminal 30 (intrinsically safe earth/ground) of the control unit must be connected to a high integrity earth/ground point.

7. A mains powered Control Unit must not be connected to a supply exceeding 250 V r.m.s. or dc, or to apparatus containing a source of voltage exceeding 250 V r.m.s. or dc.

8. A direct current (dc) powered control unit must not be connected to a supply exceeding 30 Vdc or apparatus containing a source of voltage exceeding 30 Vdc.

9. The intrinsically safe outputs of the control unit may be connected to certified equipment used in a hazardous area. Refer to Appendix B: Product Certifications for details of relevant certifications.

10. Cable between the MCU900 Series control unit and a transmitter should be shielded, twisted-pair with the shield connected to terminal 3 (marked with earth symbol) on the MCU900 Series control unit. The shield should be left unconnected at the transmitter unless there is a terminal specifically provided for this purpose.

11. Cable runs should be separate from any high voltage or mains cables to avoid crosstalk or interference.

12. Refer to the technical data in Appendix A: Reference Data.

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3.3 Mounting the control unit

3.3.1 Mounting the wall-mount version

Guidelines

 This housing is rated IP65. It is suitable for mounting outside, but this should be above

any flood level, away from any overflow path, and away from direct sunlight

 Do not mount the control unit on a structure that is subject to vibration, or in a position

where damage may be caused by impact, thermal stress, or liquid ingress

 The mass of the mains powered unit is 1.4 kg, and the DC powered unit is 1.0 kg.

To conform with safety requirements, the wall on which the unit is mounted should be capable of supporting four times this weight

 It is not necessary, or advisable, to remove the upper part of the unit housing that

contains the LCD and keypad. There are no user serviceable parts inside. The unit must not be modified in any way

Procedure

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June 2014

1. Mount the unit on a suitable wall or structure using the fixing points shown on

Figure A-1 on page 121.

2. Make the electrical connections (see “Making electrical connections on wall-mount units” on page 13).

3.3.2 Mounting the panel version

Guidelines

 This housing is rated IP40 and is designed for panel mounting in a weatherproof

environment. An optional fascia overlay hood is available which improves the IP rating to IP65 – see Product Data Sheet IP2031 on the Mobrey brand pages at www.emersonprocess.com for ordering information

 Do not mount the control unit on a structure that is subject to vibration, or in a position

where damage may be caused by impact, thermal stress, or liquid ingress

 Where three of more units are fitted in the same cabinet or panel, ensure that there is

adequate air circulation to aid cooling. It is recommended that an air circulation fan be fitted

 The unit requires at least 6.5 in. (165 mm) clearance behind the mounting panel to

avoid cable fouling

 After mounting the control unit, all wiring is made at the rear of the unit using the two

part terminal blocks provided. (A pre-wired data download socket suitable for front panel mounting is provided on the MCU90F)

Section 3: Installation

 Mount the control unit on a panel with thickness 1.5 to 10 mm, ensuring the panel is

strong enough to support the 2.6 lb. (1.2 kg) weight of the unit

 Ensuring there is enough clearance behind the chosen position in the panel (6.5 in [165

mm] minimum), cut a horizontal slot 5.43 in. (138 mm) long by 2.68 in. (68 mm) high in the panel and remove any rough edges

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Procedure

1. Unpack the two screw clips provided.

2. Identify the moulded lugs (protrusions) in the recesses on each side of the control unit.

3. Holding the screwdriver-slot-end of the threaded spindle of one of the screw clamps

4. Remove the screw clamps from both of the screw clamp frames.

5. Slide the control unit into the panel, ensuring that the panel seal provided is in place

6. Re-fit the screw clamps, one on each side, and tighten with a screwdriver to clamp the

Reference Manual

IP2030/RM, Rev AA

(Ignore the recesses on the top and bottom of the unit).

and looking at the control unit rear, engage a screw clamp frame onto the control unit side (see Figure 3-1 on page 12) and see how the four steel lugs (protrusions) of the screw clamp frame engage with the moulded lugs of the unit. Gently pull the screw clamp for the lugs to engage with each other.

behind the front panel bezel.

control unit against the panel.

7. For electrical connections, see “Making electrical connections on panel-mount units” on page 15.

Figure 3-1. The fitted screw clamp

A. Screw Clamp Frame B. Front Panel Bezel C. Screw Clamp With Threaded Spindle

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3.4 Electrical installation

It is the responsibility of the installer to:

 Refer to safety data and electrical specifications in Appendix A: Reference Data  Refer to the certifications and control drawings in Appendix B: Product Certifications  Check and obtain any work permits required before applying power to the unit  Observe all local regulations and approval requirements  Ensure the wiring is suitable for the load current  Ensure the wiring insulation is suitable for the voltage, temperature, and environment

of the installation

 Ensure suitable cable glands or conduit connections are used when wiring to the

control unit to maintain enclosure integrity

Never remove or modify the mechanical barriers separating the terminal area from the main enclosure and separating the transmitter input terminals from other terminals.

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3.4.1 Making electrical connections on wall-mount units

All field wiring connections are accessible by removing the lower terminal cover, which is secured by two screws on the wall-mount control unit.

The cabling between the Mobrey MCU900 Series control unit and a transmitter should be a screened (shielded), twisted-pair type with the cable screen (shield) connected to terminal 3 (marked with earth/ground symbol) on the Mobrey MCU900 Series control unit. The cable screen (shield) should be left unconnected at the transmitter end unless there is a terminal specifically provided for this purpose.

Cable runs should be separate from any high voltage or mains cables to avoid crosstalk or interference.

Figure 3.4.2 on page 15 shows the layout of the control unit terminals. All terminal blocks are



suitable for wires 14 to 26 AWG (0,5 to 1,5 mm



for wires 10 AWG (2,5 mm

). Insulation should be stripped back 1/4 in. (7 mm).

Transmitter connections are made on the left side of the terminals enclosure. The intrinsically safe earth/ground (terminal 30) must be connected to a high integrity earth/ground point if the transmitter connected to terminals 1 and 2 is sited in a hazardous area.

Note

 Use only 167 F (75 C) copper conductors for field wiring.

), except the mains terminals which are suitable

Section 3: Installation

Note

 In intrinsically safe systems, apparatus connected to the MCU900 Series control unit

must not be supplied from a voltage greater than 250V r.m.s. or 250 Vdc.

Section 3: Installation

10 11 12

0VIN2IN1

789

24V

out

456

RX TX

1316141715

NO COM NC

NCCOMNO

25 26 27

COM

1922202321

NO COM NC

NCCOMNO

24V

2 3

FUSE

200mA (T)

29 30

IS EARTH

June 2014

Figure 3-2. Connection terminals layout (for mains-powered wall-mount unit)

(The direct current (dc) powered unit has a slightly different layout – terminals 31 and 32 replace terminals 28 and 29).

Table 3-1. Connection terminal descriptions (for wall-mount unit)

Ter mi na l Function Terminal marking

1 Loop supply 24V 2 Current input Iin 3 Cable screen Earth (Earth symbol) 4-6 RS232 RX-TX-0V 7-9 Current output 24V-Iout-0V 10-12 Digital input 1 and 2 IN1-IN2-0V 13-15 Relay 1 NO-COM-NC 16-18 Relay 2 NO-COM-NC 19-21 Relay 3 NO-COM-NC 22-24 Relay 4 NO-COM-NC 25-27 Relay 5 NO-COM-NC 28-29 30 I.S. Earth/Ground (Earth/Ground symbol) 31 32

(1) Mains-powered control unit only. (2) Direct current (dc) powered control unit only.

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(1)

(2)

Mains input L-N

Negative Positive +

Cable glands for the wall-mount unit

The five cable-entry positions are pre-drilled to accept M20 cable glands. The Mobrey MCU90F control unit has a data download socket factory pre-fitted in one of these cable-entry positions.

Two cable glands, rated IP65 and suitable for cable with outside diameter 4 to 7 mm, are supplied for use with the mains supply and transmitter cable. M20 blanking plugs are supplied for the other three cable entry positions.

All glands and blanking plugs are supplied in a plastic bag. The installer must fit these, or suitable equivalents, in place of the transit red-caps, to ensure weatherproofing of the control unit. The white sealing washers supplied with the cable glands and blanking plugs must be fitted on the outside of the enclosure under gland/blanking plug.

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Section 3: Installation

3.4.2 Making electrical connections on panel-mount units

Field wiring connections are made to the back of the panel-mount control unit using the two-part (plug/socket) terminal connectors provided. Figure 3-3 shows the rear panel layout.

Note

 The plug/socket terminal connectors on the panel mount unit are polarized (keyed)

to prevent inter-changeability and incorrect connection.

Cabling between the Mobrey MCU900 Series control unit and a transmitter should be a screened (shielded), twisted-pair type with the cable screen (shield) connected to terminal 3 (marked with earth/ground symbol) on the control unit. The cable screen (shield) should be left unconnected at the transmitter end unless there is a terminal specifically provided for this purpose. Cable runs should be separate from any high voltage or mains cables to avoid crosstalk or interference.

Connect terminal 30 (intrinsically safe earth/ground) to a high integrity earth/ground point if the transmitter connected to terminals 1 and 2 is sited in a hazardous area.

June 2014

Figure 3-3. Connection terminals layout (for mains-powered panel-mount unit)

(The direct current (dc) powered unit has a slightly different layout – terminals 31 and 32 replace terminals 28 and 29).

Table 3-2. Connection descriptions for panel mount unit

Ter mi na l Function Terminal marking

(1)

28-29 30 I.S. Earth (Earth symbol)

(2)

(1) Mains-powered control unit only. (2) Direct current (dc) powered control unit only.

Mains input L-N

Negative Positive +

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3.4.3 Power connections

When the control unit is powered by mains alternating current (ac) power, select the voltage as 115V or 230V using the voltage-selector slide switch.

When the control unit is direct current (dc) powered, ensure the supply is adequate (15 to 30 Vdc). Do not exceed 30 Vdc.

A switch or circuit breaker should be installed in close proximity to the instrument, and labelled as such. Although the Mobrey MCU900 Series control unit meets all European standards for surge immunity on power and signal lines, it is recommended that lightning suppressors are also fitted if local conditions make this advisable.

3.4.4 Earthing connections

The IP-rated Mobrey MCU900 Series control unit is double insulated and does not require a mains earth.

Do not connect terminal 30 to a mains earth. Terminal 30 is provided for use as an intrinsically safe (or functional) earth connection, which must be used when a transmitter is mounted in a hazardous area and is connected to terminals 1 and 2.

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Terminal 3 is to be used for connection of a twisted-pair cable screen (shield) when the control unit is powering the transmitter (see Figure 3-4 on page 17). This screen (shield) should be left unconnected at the transmitter end unless there is a terminal provided for this purpose.

When connected to equipment located in a hazardous area, not meeting the requirements of clause 6.3.12 (Isolation of circuits from earth or frame) in IEC 60079-11:2006 (EN 60079-11:2007), equipotential earthing must be ensured between the equipment and the intrinsically safe earth. An example of equipotential earthing is a cable with a cross-sectional

area greater than 4 mm

and a resistance of less than 1 ohm.

3.4.5 Transmitter connections and cabling

Connection of a transmitter to the control unit does not confer intrinsic safety on the transmitter. It is the responsibility of the user to ensure any transmitter installed in a hazardous area is suitable for use and certified accordingly. The installation should be in accordance with a recognized code of practice.

Check that the electrical parameters of the installed system of control unit, transmitter, any loop-powered devices, and interconnecting cable to ensure compliance with the product certificates and technical data. Particular attention must be given to the cable and the transmitter to ensure that the total capacitance and inductance limits stated in the technical data in Appendix B: Product Certifications are not exceeded.

Cable joins are allowable in cabling the transmitter, provided that the joint is made within an IP20/NEMA 3 (minimum) enclosure suitable for the environment, and that wiring withstands a test voltage of 500 V r.m.s. to earth.

The maximum length of cable permissible between the transmitter and control unit is determined by limits imposed by the intrinsic safety certificates of the instruments and control drawings.

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1 2 3

24 V

IP2030/RM, Rev AA

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June 2014

No other outputs from the control unit must be routed through a hazardous area unless protected by an additional I.S. Barrier (not supplied).

It is the responsibility of the user to ensure that any transmitter is installed in accordance with the manufacturer’s instructions supplied with the transmitter.

Cable between the MCU900 Series control unit and a transmitter should be shielded twisted-pair with the shield connected to terminal 3 (marked with earth symbol) on the MCU900 Series control unit. The shield should be left unconnected at the transmitter unless there is a terminal specifically provided for this purpose.

Cable runs should be separate from any high voltage or mains cables to avoid crosstalk or interference. Multi-core cable may be used if the other cores carry only low voltage (24 Vdc nominal) signals and each pair of cores is individually screened (shielded).

Loop-powered transmitters must be connected to terminals 1, 2, and 3 on the control unit (see Figure 3-4).

The MCU900 Series control unit supplies 23 Vdc from a 400 Ohm source to power transmitters. Separately powered transmitters must be connected to terminals 2 and 3 (see Figure 3-5).

Figure 3-4. Loop-powered transmitter connections to MCU900 Series control unit

1 2 3

A. Control unit B. Transmitter

Figure 3-5. Self-powered transmitter connections to MCU900 Series control unit

A. Control unit B. Transmitter

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1 2 3

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3.4.6 Connecting HART transmitters to the Mobrey MCU902

The Mobrey MCU902 control unit takes the input from two HART transmitters and calculates the sum, difference, or product of the two inputs.

Note

 The transmitters must be HART compatible for the MCU902 to operate correctly.

Connection of the two transmitters to the MCU902 can be done by:

 cabling both transmitter cables wired directly into Current Input terminals on the

MCU902 (Figure 3-6), or

 using a single cable wired directly into Current Input terminals with the two

transmitters connected to this single cable via a suitable junction box (Figure 3-6).

Figure 3-6. Connecting two HART transmitters to the Mobrey MCU902

A. HART Transmitter Tx1 B. HART Transmitter Tx2 C. Junction box

For correct operation, each HART transmitter must be changed to “multi-drop” mode to allow them to communicate with the Mobrey MCU902 control unit through a common connection. Each HART transmitter must therefore have their poll address changed from the factory default address of “0” to a unique address.

The MCU902 control unit is used to achieve this address change, but requires the transmitters to be connected in a specific sequence as detailed here:

1. With the power supply turned off, connect the first HART transmitter to the Current Input terminals on the MCU902 control unit (see Figure 3-6).

2. Check the voltage-selector-switch is set for the correct voltage on the mains-powered control unit (115 or 230 Vac), and then turn the power on.

3. After applying power, the control unit searches for a HART transmitter.

A HART transmitter with the factory default polling address of 0 is found after 15 seconds. The control unit automatically changes the Transmitter Poll Address from “0” to “1” and it is designated “Tx1” (Transmitter 1) and assigned to Channel 1.

The control unit reads parameters from the HART transmitter and makes them available for local interrogation and programming within the menu system.

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Section 3: Installation

June 2014

4. When an un-configured Mobrey MSP Series Level Transmitter is being used for the first time, a prompt appears asking for the Trans mitter [1] B ottom Refe r ence.

If commissioning the system now, edit and save a new Transmitter Bottom Reference or keep the existing Transmitter Bottom Reference. After the start-up process is complete, the display appears showing a measurement e.g. liquid level or the menu system.

If the system is not to be commissioned at this time, simply switch off the power and the same prompt re-appears when switching on the power next time. The Transmitter Bottom Reference can be changed later, but it is better to get it correct now.

Note

 If the Re-connecting to Digital Transmitter message does not appear, check that the

operating mode of the control unit is set to Run App mode (see page 38) and that the Input Channel Source is set for a digital HART input (see page 48 or page 50)

5. Turn the power supply off and connect the second HART transmitter (see Figure 3-6), such that both HART transmitters are connected at the same time.

6. Turn the power supply on.

7. The MCU902 control unit searches for, and detects, the two connected HART transmitters.

After the second HART transmitter is found, the control unit automatically changes the Transmitter Poll Address from “0” to “2” and it is designated “Tx2” (Transmitter 2) and assigned to Channel 2.

The control unit reads parameters from the HART transmitter and makes them available for local interrogation and programming within the menu system.

8. When an un-configured Mobrey MSP Series Level Transmitter is being used for the first time, a prompt appears asking for the Trans mitter [2] B ottom Refe r ence.

9. The two HART transmitters are now known to the control unit, and will be remembered each time the power is switched off and on.

Section 3: Installation

Internally Powered Loop Powered

June 2014

3.4.7 Relay connections

The five voltage-free contact relays are grouped as shown in Tab l e 3 -3 . Whilst each relay is individually double-insulated, their arrangement is such that the insulation between relays in the same group is standard or ‘basic’ insulation. Care must be taken in order to avoid the risk of electric shock. It is allowed to use relays in the same group to control circuits with both mains and dc, or low voltage circuits.

Note

 The relay labels (NO-C-NC) in Ta b l e 3- 1 and Ta bl e 3 - 2 represent the relay terminals in

the de-energized state.

Table 3-3. Relay configuration groups

Wall Mount MCU900 Series control unit Panel Mount MCU900 Series control unit

Relay 1 and 2: Group 1 Relay 1, 2 and 3 : Group 1 Relay 3 and 4 : Group 2 Relay 4 and 5 : Group 2 Relay 5: Group 3

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3.4.8 Current output connections

The Current Output may be connected in internally-powered or loop-powered mode, as shown in

Figure 3-7. In loop-powered mode, an external power source is required. A minimum of 2.5 V dc

is required across terminals 7 and 8 for correct operation. The voltage must not exceed 30 Vdc.

Figure 3-7. Alternative output current configurations

24V

Load

24V

External Supply

Load

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3.4.9 Digital control voltage-free contact inputs

There are two trigger inputs, IN1 and IN2. Each input is connected as shown in Figure 3-8.

Figure 3-8. Connections for external trigger input

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External Contact Closure

or10 11

Section 3: Installation

Note B

Use the supplied mini-B nut to secure the socket to the panel.

Note A

Cut-out the hole in the panel to the dimensions shown in Figure A-2 on page 122.

June 2014

3.4.10 RS232 connections

The RS232 connections, terminals 4, 5 and 6, are for downloading logged data to a PC or a handheld device.

 Wall-mountable Mobrey MCU90F control units are supplied with a factory pre-fitted

RS232 data-download socket, which is also pre-wired to terminals 4, 5, and 6.

 The panel-mountable Mobrey MCU90F control unit is supplied with a data-download

socket ready to be fitted to a panel (see Figure 3-9 on page 22) and then wired to terminals 4, 5, and 6 on the rear of the control unit (see Figure 3-10 on page 23).

When there is data to be downloaded using Mobrey LOG-VIEW or other software, connect the RS232 data-download cable supplied with the socket (see Figure 3-11 on page 23).

Figure 3-9. Fitting the RS232 data-download socket to a panel

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A. RS232 socket with cap fitted. B. RS232 socket flying lead.

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4: Rx (White)

5: Tx (Red)

6: 0V (Black)

Note B

Note A

Note C

IP2030/RM, Rev AA

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June 2014

Figure 3-10. Wiring the socket flying lead to terminals 4, 5, and 6 (panel mount unit)

Figure 3-11. Connecting the RS232 data-download cable supplied with the socket

A. RS232 data-download cable. B. Unscrewed socket cap. C. See Mobrey LOG-VIEW manual IP130 for further information on downloading logged data.

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Section 4 Getting started

Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 25

Switching on the MCU901 and MCU90F for the first time . . . . . . . . . . . . . . . . . . . . page 26

Switching on the MCU902 for the first time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 29

A quick tour of the menu system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 30

Programming the control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 32

4.1 Safety messages

Procedures and instructions in this section may require special precautions to ensure the safety of the personnel performing the operations. Information that raises potential safety issues is

indicated by a warning symbol ( ). Refer to the safety messages listed at the beginning of each section before performing an operation preceded by this symbol.

Section 4: Getting started

June 2014

Failure to follow these installation guidelines could result in death or serious injury:

 The Mobrey MCU900 Series control unit must be installed, connected,

commissioned, operated, and maintained by suitably qualified personnel only, observing any national and local requirements that may apply

 Use the equipment only as specified in this manual. Failure to do so may impair the

protection provided by the equipment

Explosions could result in death or serious injury:

 Please review the approvals section of this reference manual for any restrictions

associated with an installation

Electrical shock could cause death or serious injury:

 If the control unit is installed in a high voltage environment and a fault condition or

installation error occurs, high voltage may be present on leads and terminals

 Use extreme caution when making contact with the leads and terminals  Make sure that power to the control unit is off while making connections

Section 4: Getting started

20mA

4mA

June 2014

Reference Manual

IP2030/RM, Rev AA

4.2 Switching on the MCU901 and MCU90F for the first time

The Mobrey MCU901 and MCU90F control units accept the input from a single HART or 4–20 mA transmitter. Connect the transmitter to the Current Input terminals on the control unit as explained in the section “Electrical installation” on page 13.

Figure 4-1. The Mobrey MCU901 or MCU90F control unit with one transmitter

A. Mobrey MSP Series Transmitter E. Pump B. Mobrey MCU900 Series Control Unit F. Transmitter Bottom Reference C. 4–20 mA signal output G. 4–20 mA and HART signal input D. Relay

Section 4: Getting started26

Reference Manual

Re-connecting to Digital Transmitter Please Wait

(start of search)

(after 3 seconds)

(after 15 seconds)

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Section 4: Getting started

June 2014

4.2.1 Switching on with one new HART transmitter connected

After applying power, the control unit first displays the control unit version e.g. MCU901 and the software version. It then automatically searches for a HART transmitter.

Figure 4-2. Searching for a HART transmitter after applying power

A HART transmitter with the factory default polling address of 0 is found after 15 seconds. When found by the controller, it is designated “Tx1” (Transmitter 1) and assigned to Channel 1.

However, if the polling address is in the range 1 to 15, a prompt appears allowing the polling address and the tag name to be changed. This is optional, and pressing the red (ENTER) button continues the start-up process.

At this time, the control unit reads parameters from the HART transmitter and makes them available for local interrogation and programming within the menu system of the control unit.

When an un-configured Mobrey MSP Series Level Transmitter is being used for the first time, a prompt appears asking for the Transmitter Bottom Referen ce (Figure 4-3). This value is used to automatically set-up the 4–20 mA output span of the transmitter over this range.

If commissioning the system now, edit and save a new Transmitter Bottom Reference or keep (save) the existing Transmitter Bottom Reference (Figure 4-3).

Note

 If the Re-connecting to Digital Transmitter message does not appear, check that the

operating mode of the control unit is set to Run App mode (see page 38) and that the Input Channel Source is set for a digital HART input (see page 48 or page 50)

After the start-up process is complete, the display appears showing a measurement e.g. liquid level or the menu system. The value on the display is the Primary / Process Variable (PV) of the control unit, but this can be changed (see “Display configuration options” on page 102).

Section 4: Getting started

Whenever power is lost and restored, the control unit re-establishes digital communications with the HART transmitter and the PV display re-appears.

Section 4: Getting started

Re-connecting to Digital Transmitter Please Wait

Bottom Reference = distance to sensor

from tank bottom

=Continue

Edit Transmitter

Bottom Reference ?

12.000 m

ESC=No =Yes

to edit

Bottom Reference

06.500 m

ESC=Back =Save

Save new

Bottom Reference ?

06.500 m

ESC=No =Yes

Bottom Reference

saved.

Setup controller ?

ESC=No =Yes

Esc

Save

Bottom Reference ?

12.000 m

ESC=No =Yes

Esc

Controller SETUP

menu appears – Use App Wizard

(see page 39)

Controller MAIN

menu appears

(Yes)

(No)

(Back)

(No)

(Continue)

(06.500 m)

(No)

(Yes)

Note A

Note B

June 2014

Figure 4-3. Prompts for Transmitter Bottom Reference

Reference Manual

IP2030/RM, Rev AA

A. Default Bottom Reference as read from a Mobrey MSP900FH Transmitter configured with metric base units. Example is for illustration only. B. The 6.500 m has been used here as an example new bottom reference. Enter the value that is required for your level measurement.

Section 4: Getting started28

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IP2030/RM, Rev AA

Section 4: Getting started

4.2.2 Switching on with one 4–20 mA transmitter connected

After applying power with a 4–20 mA transmitter connected, the Full PV Display appears and indicates a control unit Primary / Process Value (PV) of zero. It is then necessary to configure the control unit for a 4–20 mA input instead of a digital HART input.

See “Optional change: transmitter input channel settings (advanced users)” on page 43 for this procedure.

4.3 Switching on the MCU902 for the first time

The Mobrey MCU902 takes the input from two HART transmitters and calculates a single sum, difference, or product of the two inputs.

It is important to connect the two HART transmitters in the correct sequence, as detailed in

“Connecting HART transmitters to the Mobrey MCU902” on page 18.

After both HART transmitters are connected, the top-left corner shows communications with both transmitters by alternating “1” and “2” next to the digital communications icon.

June 2014

The factory default configuration shows the reading from the first connected transmitter (Tx1). This configuration can be changed to show the sum, difference or product of the readings from both transmitters.

Figure 4-4. The MCU902 and two HART transmitters

A. Mobrey MCU900 Series Control Unit D. Transmitter [1] Bottom Reference B. Mobrey MSP Series Transmitter E. Transmitter [2] Bottom Reference C. HART Communications

Section 4: Getting started

June 2014

4.4 A quick tour of the menu system

Follow these instructions for a quick tour of the menu system:

1. This quick tour begins at the Full Display or Large PV Display (Figure 4-5 on page 31).

If already within the menu system, use the Esc button repeatedly until the Full Display re-appears.

2. Press the red (ENTER) button to display the MAIN MENU (see Figure 4-5 on page 31).

The MAIN MENU is the top level of the menu system.

3. Navigation of the menu system is achieved by using the ARROW buttons,

the red (ENTER) button, and the Esc button.

The Esc button returns you to the previous menu level, unless you are at the top level.

4. The highlighted and blinking text indicates what menu option will be selected if the

red (ENTER) button was pressed now. Do not press it yet.

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IP2030/RM, Rev AA

5. The

6. The MAIN MENU sits above a series of sub-menus, which lead to further levels of

7. Press the red (ENTER) button to select the highlighted menu option SETUP.

8. The SELECT INSTRUMENT menu now appears. This screen is for selecting whether to

9. Press the red (ENTER) button to select the highlighted menu option Controller: ****.

10. The control unit SETUP menu now appears with menu options APPLICATION, DISPLAY,

11. Use the DOWN-ARROW button to highlight OUTPUT and then press the red (ENTER)

12. The OUTPUT menu now appears with menu options CURRENT OUTPUT, RELAY,

symbol on the display indicates there are further menu options available,

accessible by using the DOWN-ARROW button.

 symbol indicates there are further menu options available, accessible by using the

UP-ARROW button.

sub-menus that lead to parameter screens (see Figure 4-6 on page 31).

enter the setup menu for the control unit (controller) or a found HART transmitter.

If there are no HART transmitters connected, Step 7 results in the SETUP menu for the control unit appearing straight away. Skip to Step 10.

and OUTPUT visible.

button to select and enter the OUTPUT menu.

TOTALIZER, PV DAMPING, ALARM, and FAU LT.

13. Explore these menu options to see screens for setting-up for an application and for

displaying read-only information.

14. After exploring, hold down the Esc button once to return to the MAIN MENU.

Section 4: Getting started30

Reference Manual

MAIN MENU

Run App? MONITOR

SETUP

SELECT INSTRUMENT

Tx1: **** Tx2: ****

Controller : ****

MAIN MENU

Run App? MONITOR

Advanced

SELECT INSTRUMENT

Tx1: **** Tx2: ****

Controller : ****

ADVANCED

Dxxx

Pxxx

Run App?

= Yes

Esc=No

Program?

=Yes Esc=No

Note A

Note B

Note C

Note D

Note E

Note F

IP2030/RM, Rev AA

Figure 4-5. How to enter the menu system

1.572m

SETUP

Run App? MONITOR

A. Large PV display. B. Full display showing PV in normal size characters and other information.

Figure 4-6. MAIN MENU overview

12:47

Section 4: Getting started

June 2014

MAIN MENU

Section 4: Getting started

A. Toggles the operating mode of the control unit. An open padlock indicates that Program mode is selected and

parameter values can be changed. B. Selecting Controller: ****leads to the SETUP menu for setting up the control unit for an application. C. Selecting Tx1: **** leads to the SETUP menu for adjusting the HART transmitter Tx1 operation (and similarly for Tx2

on the Mobrey MCU902). The Transmitter Bottom Reference for Tx1 (and similarly for Tx2) can be changed here. D. Selecting Controller: **** leads to menus for viewing live readings and diagnostic information for the control unit. E. Selecting Tx1: **** leads to menus for viewing live readings and diagnostic information from the HART transmitter

Tx1 (and similarly for Tx2 on the Mobrey MCU902). F. Advanced access menu for advanced users to directly select parameter screens when the parameter number is

known. For a guide to this, see Appendix D Additional Features.

Section 4: Getting started

June 2014

4.5 Programming the control unit

4.5.1 The basics

This chapter covers programming using the front panel of the MCU900 Series control unit to make changes to the factory default set-up of the control unit.

Use the Application Wizard (App Wizard) to easily set-up the control unit for a level, flow, or contents volume application, and then optionally adjust the set-up by editing parameters in the menu system. See Appendix C: Menus and Parameters for a full list of menus and parameters.

Note

 If a Mobrey MSP Series transmitter is connected, refer to the reference manual of the

transmitter for full information about programming the transmitter parameters (e.g. Transmitter Bottom Reference) using the MCU900 Series control unit or other HART-based devices.

 For information about how the control unit supports other HART transmitters, see

Appendix C: Menus and Parameters and Appendix E: Support for HART® Transmitters.

Reference Manual

IP2030/RM, Rev AA

The basics about parameters

The MCU900 Series control unit has menu-based parameters for programming – setting up for an application, adjusting default settings, etc. – and for viewing information.

Parameters are populated throughout the menu system. They are grouped in sub-menus, which are organized for intuitive programming. Each parameter has a unique 3-digit identification number, prefixed by a 'P' (if programmable) or a 'D' (if for display purposes only).

Note

 A full list of menus and parameters is in Appendix C: Menus and Parameters

With some experience, it becomes easy to locate parameters. Alternatively, parameters can be accessed directly by entering their unique 3-digit identification number. Details of this Advanced access feature are in Appendix D: Additional Features.

To understand the basics about editing a parameter setting, follow the worked examples for editing a numerical parameter and the calendar date parameter.

Section 4: Getting started32

Reference Manual

Note A

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Section 4: Getting started

June 2014

How to edit a numerical parameter

1. Navigate to the Up Range Value parameter screen (see Figure 4-7).

2. When entering any parameter screen, it is in View Mode (Figure 4-8 on page 34). Help with what can be done next is on display line 4.

(In View Mode, the Esc button is used to leave (quit) the parameter screen. The SETTINGS menu then re-appears, as seen before selecting the parameter screen).

3. To enter Edit Mode, press the red (ENTER).

4. A highlighted “+” appears (Figure 4-8) to show this positive sign can be changed to be a negative sign. The UP-ARROW or DOWN-ARROW cycles between “+” and “–”.

(Also, note that on display line 4, “Edit” has changed to be “Save”).

5. Change the number from “+12.000” to “+6.500” (Figure 4-8):

a. Press the RIGHT-ARROW button once to move right one space and highlight the “1”.

(The LEFT-ARROW can be used to move the highlight back one space).

b. Press the UP-ARROW button five times to change the “1” to a “6”.

(The DOWN-ARROW can be used to scroll down through the numbers and decimal point).

c. Press the RIGHT-ARROW button once to highlight the “2”.

d. Press the DOWN-ARROW button three times to change the “2” to a decimal point.

e. Press the RIGHT-ARROW button once to highlight the old decimal point.

f. Press the DOWN-ARROW button six times to change the old decimal point to a “5”.

(Note that other button press sequences could have been used to edit 6.500).

6. Press the red (ENTER) button to save the +6.500 and return to View Mode

that on display line 4, “Save” has changed back to “Edit”).

(Not

7. Press the Esc button to return to the SETTINGS menu.

Figure 4-7. Navigation to a numerical parameter screen

SETUP

CURRENT OUTPUT

RELAY TOTALIZER

OUTPUT

Low Range Val

Up Range Val

Alarm Action

CURRENT OUTPUT

Up Range Val P401

12.000 m Esc=Quit =Edit

APPLICATION DISPLAY

OUTPUT

Section 4: Getting started

A. This is the SETUP menu for the control unit – see Figure 4-6 on page 31 for how to get here.

Section 4: Getting started

Note A

Note B

Note D

Note C

June 2014

Figure 4-8. Example of editing a numerical value

Up Range Val P401

12.000 m Esc=Quit =Edit

Up Range Val P401

12.000 m

Esc=Quit =Save

Up Range Val P401 +12.000 m

Esc=Quit =Save

Up Range Val P401 +62.000 m

Esc=Quit =Save

Up Range Val P401 +6..000 m

Esc=Quit =Save

Reference Manual

IP2030/RM, Rev AA

Up Range Val P401 +6.5000 m

Esc=Quit =Save

A. When entering any parameter screen, it is in View Mode. Help with what can be done next is on display line 4. B. Parameter is in Edit Mode. In this mode, pressing Esc button restores the original setting and returns to View Mode. C. The UP-ARROW button is used to scroll up through the numbers and decimal point, and the DOWN-ARROW button

scrolls down through the numbers and decimal point.

D. Parameter has returned to View Mode.

Up Range Val P401

6.5000 m Esc=Quit =Edit

How to edit the calendar date parameter

1. Navigate to the Date parameter screen (see Figure 4-9 on page 35).

2. When entering any parameter screen, it is in View Mode (Figure 4-10 on page 35). Help with what can be done next is on display line 4.

(In View Mode, the Esc button is used to leave (quit) the parameter screen. The SETTINGS menu then re-appears, as seen before selecting the parameter screen).

3. To enter Edit Mode, press the red (ENTER) button.

4. The “3” is highlighted to show this digit can now be edited (Figure 4-10).

(Also, note that on display line 4, “Edit” has changed to be “Save”).

5. Change the calendar date from “30/01/14” to “31/01/14”:

a. Press the RIGHT-ARROW button once to move right one space and highlight the “0”.

(The LEFT-ARROW can be used to move the highlight back one space).

Section 4: Getting started34

Reference Manual

SETUP

INPUT CHANNEL DIGITAL INPUT

SYSTEM

SYSTEM TEST

DEFAULTS

SETTINGS

Time Date Format

Date

Date P730 30/01/14dmy Esc=Quit =Edit

Note A

Date P

30/01/14dmy

Quit

730

Esc= Edit

Date P

30/01/14dmy

Quit

730

Esc= Save

Date P

31/01/14dmy

Quit

730

Esc= Save

Date P

31/01/14dmy

Quit

730

Esc= Edit

Note A

Note B

Note D

Note C

IP2030/RM, Rev AA

Section 4: Getting started

June 2014

b. Press the UP-ARROW button once to change the “0” to a “1”.

(The DOWN-ARROW can be used to cycle backwards through the digits and decimal point).

6. Press the red (ENTER) button to save the new date and return to View Mode.

(Note that on display line 4, “Save” has changed back to “Edit”).

7. Press the Esc button to return to the SETTINGS menu.

Figure 4-9. Navigation to the calendar date screen

A. This is the SETUP menu for the control unit – see Figure 4-6 on page 31 for how to get here.

Figure 4-10. Example of editing the calendar date

scrolls down through the numbers and decimal point.

D. Parameter has returned to View Mode.

Section 4: Getting started

MAIN MENU Run App? MONITOR

ADVANCED

Dxxx

Pxxx

June 2014

The basics about the menu navigation

In this chapter and throughout this manual, a simple notation has been used to guide you to a particular menu screen or parameter screen. This avoids the need for detailed navigation instructions.

Consider the navigation instructions to be followed before arriving at the ADVANCED menu. For the purpose of this example, the starting point is the Full PV Display.

In the notation form, this is simply:

1. Navigate to MAIN MENU / ADVANCED

Without the notation, this translates into these instructions:

1. Press the red (ENTER) button to display the MAIN MENU screen.

2. Press the DOWN-ARROW button three times until ADVANCED is highlighted and

3. Press the red (ENTER) button once.

Reference Manual

IP2030/RM, Rev AA

blinking.

If square brackets are used in the notation, e.g. MAIN MENU / SETUP / [CONTROL UNIT], it signifies that the bracketed menu does not appear in all circumstances.

When HART transmitters are not being used, the SELECT INSTRUMENT screen does not appear. As there is no need to select the control unit menu or a HART transmitter (Tx1 or Tx2) menu, the menus that appear after selecting MAIN MENU / SETUP are purely for the control unit.

Figure 4-11. Navigating to the ADVANCED menu

Section 4: Getting started36

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Section 4: Getting started

4.5.2 Step-by-step programming of the control unit

Step 1: Put the unit into Program mode

Put the control unit into Program mode. (The factory default is for it to be in Program mode). See “Run App and Program operating modes” on page 38.

Step 2: Use the App Wizard

Use the Application Wizard (App Wizard) to easily set-up the control unit for a level, flow, or contents volume application, and then optionally adjust the set-up by editing parameters in the menu system. For examples of using the App Wizard, see“Application Wizard” on page 39.

Note:

 Before using the App Wizard with a 4–20 mA transmitter, the Input Channel 1 source

parameter P111 on the control unit must be set for a 4–20 mA input (see page 44)

 Level and volume measurement duties are not available on the MCU90F Logging unit.

June 2014

Step 3: Optional changes after using the App Wizard

Optionally change system settings

This includes how to switch on the keyboard sound, setting the date/time, and changing language. See “Optional change: system settings” on page 42.

Optionally change transmitter input channel settings (advanced users)

This is for advanced users and looks in-depth at how the input channels are used to obtain the control unit Process Value / Primary Value (PV) value from a transmitter.

See “Optional change: transmitter input channel settings (advanced users)” on page 43

For most users, the App Wizard will set-up the majority of applications with no need of direct changes to input channel parameters.

Optionally change application settings (advanced users)

This is for advanced users and looks in-depth at further processing of PV values to get content (volume) or flow rate values, which can be shown on the display. A totalizer function can also be set-up. For most users, the App Wizard will set-up the majority of applications with no

need of direct changes to application parameters.

See “Volumetric contents and flow measurement applications (advanced users)” on page 52 and “Using a plotted profile for calculating volume or flow” on page 61.

Section 4: Getting started

Optionally change the digital input settings

This includes how to allocate actions to digital inputs (IN1 and IN2). See “Digital inputs IN1 and IN2” on page 63.

Optionally change output settings

This includes setting-up the 4–20mA output and relay outputs. See “Set-up the current output” on page 68 and “Set-up the relays” on page 69.

Section 4: Getting started

Program?

= Yes Esc=No

Run App?

= Yes

Esc=No

MAIN MENU

Run App?

SETUP

MONITOR

Run App?

MAIN MENU

Run App?

SETUP

MONITOR

Program?

MAIN MENU

Program?

SETUP

MONITOR

SETUP

MAIN MENU

Program?

SETUP

MONITOR

SETUP

Switching to Run App mode: Switching to Program mode:

June 2014

Optionally set-up other features

This includes configuring data logging (page 64), alarm handling (page 91), the display (page 102), serial communications (page 104), and PIN security (page 105).

By default, security restrictions are switched off and the user has access to all parameters. After programming (configuring) is complete, a PIN security code can be used to prevent unauthorized access. For details, refer to Section “PIN Security” on page 105.

Step 4: Put the unit into Run App mode

Put the control into Run App mode (see below).

For checks e.g. auto-cycle of the control unit Primary / Process Value (PV), diagnostics, and fault-finding, see Section 5: Servicing and Health Checking.

There is trouble-shooting information in Section 5: Servicing and Health Checking. Alternatively, the MCU900 Series control unit can be re-set to the factory defaults as guided in the Section “Restoring the factory defaults” on page 135.

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IP2030/RM, Rev AA

4.5.3 Run App and Program operating modes

Menu: MAIN MENU / Run App? (or MAIN MENU / Program?)

There are two operating modes on the control unit: Run App and Program.

Press the red (ENTER) button at the Run App? or Program? screen to switch between these two operating modes (Figure 4-12)

An open padlock icon indicates the MCU900 Series control unit is presently in the Program mode. In this mode, the unit can be programmed. The Current Output and all Relay Outputs are frozen unless allocated to totalizing and sampler duties. Fault relays are de-energized.

A closed padlock icon indicates that the MCU900 Series control unit is presently in the Run App mode. In this mode, most of the unit cannot be programmed. The Current Output and all Relay Outputs operate as normal.

The Program? screen (Figure 4-12) appears automatically if an attempt is made to edit a parameter whilst in Run App mode. A security PIN can be set-up to restrict the mode change.

Figure 4-12. How to switch between Run App and Program modes

Section 4: Getting started38

Reference Manual

App Wizard Select Application

Esc=Back =Next

Level

Options: * Level * Volume * Flow

Set Current Output ?

Set up Relays ?

Relay Wizard

Select Function

Pump Control

Options *

Relay(s)

Pump Control

Custom

Select Mode for

Relay 3

Hi or Lo Alarm

Options *

Rate of change

Out of limits

Digital input

Enter On point

for Relay 3

000012 ft

Enter Off point

for Relay 3

000011 ft

Set point

Hi or Lo Alarm

Setup Complete

Program further

Relays?

Pump Control

Number of Pumps

Options *

Assist com off

Assist split off

Stby com off

Stby split off

Select Pump Control

Duty

Assist com off

Number of starts

Qualifier

Options *

Number of starts

Run-Time

Ratio of Run-Time

Ratio of starts

Select

Autosequence on

Number of starts

Enter On point

for Pump 1

000000 ft

Enter On point

for Pump 2

000000 ft

Lowest common

off point 000000 ft

Pump Control

Select

Autosequence Mode ?

Relay Wizard

Select Function

Relay(s)

Select Relay

Relay 3

Options

Relay(s)

Pump Control

Custom

Setup Complete

Program further

Relays?

Esc

APPLICATION DATA

INPUTS: Level measurement in feet from transmitter. Transmitter Bottom Reference is 22 ft. Sump/lift station working level is 20 ft. 2-pump operation required is duty assist with common off. Auto-sequencing after 4 starts.

OUTPUTS: Level in feet. Relay 1 (Pump 1) on at 5 ft.; off at 1 ft. Relay 2 (Pump 2) on at 8 ft.; off at 1 ft. Relay 3 (High Alarm) on at 12 ft.; off at 11 ft.

(no)

(yes)

(Pump control)

(2)

(Assist com off)

(5)

(1)

(yes)

(Number of starts)

(4)

(yes)

(Relays)

(Relay 3)

(Hi or Lo

Alarm)

(12)

(11)

(no)

Exits to menu system.

(Select Run App mode to start application).

IP2030/RM, Rev AA

4.5.4 Application Wizard

Use the Application Wizard (App Wizard) to easily set-up the control unit for an application.

If a message appears saying that the units are not set, it is because the HART transmitter has not been found by the control unit when power was applied. Change the operating mode from

Program to Run App mode and the control unit will attempt to re-connect to the transmitter.

Note

 When using a MCU902 control unit, it is necessary to select Difference, Sum, Product,

or Independent (and channel) before Level/Volume/Flow can be selected.

 Level and volume measurement duties are not available on the MCU90F Logging unit.

Using the App Wizard to set-up a level application

Figure 4-13. App Wizard example: pump control with a high alarm

Section 4: Getting started

June 2014

Section 4: Getting started

App Wizard Select Application

Esc=Back =Next

Volume

Options: * Level * Volume * Flow

Volume Wizard

Select Tank Shape

Horiz cyl flat

Options * Vertical cylinder * Horiz Cyl flat * Horiz Cyl domed * Rectangular * Spherical * Conical bottom * 20 point table

(Wait while transferring plot points)

Choose method of calibrating Tank

Tank dimensions

Options *

Tank dimensions

Maximum volume

Enter value

of Tank diameter

6.5000 ft

Enter value

of Tank Length

255000 ft

Volume Wizard

max Tank Volume

6205.6 gal

Set Current Output ?

Enter volume

to give 4 mA out

000000 gal

Enter volume

to give 20 mA out

6200.0 gal

Set up Relays ?

Relay Wizard

Select Function

Relay(s)

Options *

Relay(s)

Pump Control

Custom

Options *

Relay 1

Relay 2

Relay 3

Relay 4

Select Mode for

Relay 1

Hi or Lo Alarm

Options *

Rate of change

Relay(s)

Select Relay

Relay 1

Out of limits

Digital input

Hi or Lo Alarm

Enter On point

for Relay 1

006000 gal

Enter Off point

for Relay 1

005800 gal

Set point

Setup Complete

Program further

Relays?

Esc

APPLICATION DATA

INPUTS: Level measurement in feet from transmitter. Transmitter Bottom Reference is 7.5 ft.

Tank is a horizontal cylinder with flat ends. Tank dimensions are 6.5 ft. dia. x 25 ft. length. Volume capacity is 6205.6 gallons.

OUTPUTS: Contents volume in US gallons displayed. Relay on at 6000 gallons; off at 5800 gallons. Current Output range 0 to 6200 gallons.

(Horiz cyl flat)

(Tank dimensions)

(continue)

(6.5)

(25.0)

(yes)

(0)

(Edits 6205.6 to be 6200.0)

(yes)

(Relays)

(Hi or Lo Alarm)

(6000)

(5800)

(no)

Exits to menu system. (Select Run App mode to start application).

(Relay 1)

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IP2030/RM, Rev AA

Using the App Wizard to set-up a contents volume application

Figure 4-14. App Wizard example: tank volume with a high alarm

Section 4: Getting started40

Reference Manual

App Wizard Select Application

Esc=Back =Next

Flow

Options: * Level * Volume * Flow

Flow Wizard

Select Output Units

gallons per min

Options *

gallons per day

gallons per hour

gallons per min

Mega gals / day

Cubic ft per hour

Cubic ft per sec

Flow Wizard

Select Profile

V-Notch Weir (5/2)

Options *

Flow Calculation

Flume/Weir (3/2)

V-Notch Weir (5/2)

V-Notch (ISO1438)

Vlarem

Parshall

Manning

20 point look-up

Enter max

flow

645.50 g/m

Enter height for

max flow

000001 ft

Enter flow

to give 4 mA out

000000 g/m

Enter flow

to give 20 mA out

645.50 g/m

Do you wish

to set up a

low flow cut off ?

(Wait while transferring plot points)

Choose method of calibrating flow

HT for max flow

Options *

Height for max flow

Flow at present height

Enter

low flow cut off

000001 %

Flow Wizard

complete

Totalizer Wizard

complete

Set up totalizer?

Display totalizer?

Set up Totalizer

relay?

Set up Sampler

relay?

Totalizer Wizard

Select Units

gallons x100

Options *

gallons

gallons x10

gallons x100

gallons x1000

million gallons

cubic feet

Esc

Inhibit Totalizer

on digital input(s)?

Esc

APPLICATION DATA

INPUTS: Level measurement in feet from transmitter. Open channel is a 60° V-Notch Weir Maximum flow is 645.50 gallons per minute. Height at maximum flow is 1 ft.

OUTPUTS: Flow rate in gallons per minute Totalized flow in gallons x 100 2% low flow cut-off

(Edits 100.0 to be 645.5)

(gallons per min)

(V-Notch Weir 5/2)

(Height for max flow)

(1)

(yes)

(2)

(0)

(645.50)

(continue)

(yes)

(gallons)

(yes)

(no)

(continue)

Exits to menu system. (Select Run App mode to start application).

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Section 4: Getting started

Using the App Wizard to set-up a flow application

Figure 4-15. App Wizard example: open channel flow with a 60° V-Notch Weir

June 2014

Section 4: Getting started

June 2014

4.5.5 Optional change: system settings

Menu: SETUP / [CONTROLLER /] SYSTEM / SETTINGS

Calendar clock

P730 Date

Set the calendar date in the format as selected by P734.

P731 Time

Set the clock time. The 24-hour clock format is supported.

P734 Date format (Default setting is "dd/mm/yy")

Choose between “dd/mm/yy”, “yy/mm/dd”, and “mm/dd/yy”.

Keypad sound

P735 Keypad Sound (Default setting is “Off”)

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If you want the keypad sound switched on, select “On” from the option list.

Language

P737 Language (Default setting is "English")

If you wish to change the language used on-screen, there is a choice of other languages.

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Section 4: Getting started

4.5.6 Optional change: transmitter input channel settings (advanced users)

Sections 4.5.6 to 4.5.9 are for advanced users. They explain in-depth what transmitter inputs are supported on the control unit, and how to program (configure) the operation of those transmitter inputs to result in a control unit Primary / Process Value (PV).

The resulting control unit PV is indicated on the factory-default configured display.

For most users, the App Wizard will set-up the majority of applications with no need of direct changes to input channel parameters.

Transmitter input channels on the Mobrey MCU901 and MCU90F

The MCU901 and MCU90F control units support the connection of a single 4–20 mA or HART transmitter. There is one transmitter input channel and it is referred to as Input Channel 1.

For a 4–20 mA transmitter:

 See “Programming Input Channel 1 for a 4–20 mA input (advanced users)” on page 44.

June 2014

For a HART transmitter:

 See “Programming Channel 1 for a HART input (advanced users)” on page 48.

Transmitter input channels on the Mobrey MCU902

The MCU902 control unit supports the connection of two HART transmitters, but not two 4–20 mA transmitters. The input channels and are referred to as Input Channel 1 and Input Channel

For two HART transmitters:

 See “Programming Channel 1 for a HART input (advanced users)” on page 48.

 See “Programming Channel 2 for a HART input (MCU902 only) (advanced users)” on

page 50

Sum, difference, or product calculations using input channels 1 and 2

Parameter P150 selects how final values from transmitter input channels 1 (D851) and 2 (D852) are processed together – sum, difference, or product calculation – before being output to parameters D800, D801, D802, or D803 ('Answers').

The factory default programming (configuration) for P150 is to allow values from D851 to go straight to D800.

For a graphical overview, see Figure 4-17 and Figure 4-18 on page 47.

Section 4: Getting started

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4.5.7 Programming Input Channel 1 for a 4–20 mA input (advanced users)

This section explains how to program (configure) the operation of the Input Channel 1 on the control unit when a 4–20 mA transmitter is connected. Do not connect a second transmitter. Please read this section together with the graphical overview in Figure 4-16 on page 47.

The final result of the Input Channel 1 processing is stored in D800 and is referred to as the control unit Primary / Process Value (PV). It is shown on the factory default configuration of the display.

Essential parameters to program

Select the displayed units for the control unit Primary/ Process Value (PV)

First, it is essential to know the units for the measurements coming from the transmitter. When this is known, navigate the menu system to SETUP / [CONTROLLER /] DISPLAY / PV Units for the PV Units parameter P200 and then select the measurement units that are to be shown for the control unit PV on the display.

Please note that the PV Units parameter (P200) does not automatically convert the transmitter input or the control unit PV into alternative units. It is necessary to enter a conversion factor into parameter P114 (see the descriptions that follow).

Set Input Channel 1 to receive input from a 4–20 mA transmitter

1. Navigate to the menu SETUP / [CONTROLLER /] INPUT CHANNEL / Ch1 I/P Source for

the Ch1 I/P Source parameter P111.

2. Select mA in 1 from the option list.

Note

 The built-in Application (App) Wizard is an easy-to-use configuration tool that can be

used to automatically populate values and settings in the input channel parameters.

Navigate to: SETUP / [CONTROLLER /] APPLICATION / App Wizard

 Before using the App Wizard with a 4–20 mA transmitter, the Input Channel 1 source

parameter P111 on the control unit must be set for a 4–20 mA signal input; this is not the factory default setting for P111.

Optional parameters and how the 4–20 mA signal is processed

Figure 4-16 on page 47 shows how the 4–20 mA input signal is processed through Input

Channel 1 and which parameters and processing stages affect the resulting control unit PV.

Signal conditioning and damping stages

Analog measurements (level, pressure, and temperature, etc.) are input to the control unit as a 4–20 mA signal, and pass through a conditioning stage (to remove spikes) and a damping stage (to smooth out large jumps in signals).

The damping can be adjusted by changing the time setting (in seconds) in parameter P321. Navigate to the menu SETUP / [CONTROLLER /] INPUT CHANNEL / Cur I/P Damping.

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Section 4: Getting started

June 2014

Signal limits check

The signal is then checked to ensure it is within the range of 3.7 to 20.75 mA. Signals outside this range cause an alarm condition, which may be externally signalled using a control unit relay (see “Alarm indication selection” on page 91).

Conversion of signal into a percentage value

By default, the mA signal (readable via D840) is converted (normalized) into a percentage in the range 0 to 100% (readable via D842), where 4 mA is 0% and 20 mA is 100%.

Note

 The control unit can process mA input values in the range 3.8 to 20.5 mA

 Read-only parameters D840 and D842 are in the menu MONITOR / DIAGNOSTICS

Applying the optional percentage offset adjustment

P112 is a positive, negative, or zero offset adjustment of the converted (normalized)

percentage. This optional offset feature can be used to accommodate a standing level in a tank.

Note

 The output from this adjustment is readable in D802 and is the Tertiary Value (TV) of

the control unit. D802 = D842 + P112

 P112 is in the menu SETUP / [CONTROLLER /] INPUT CHANNEL / Ch1 I/P Offset

Applying the scaling factor to get the required units

Changing the PV display units (P200) does not automatically convert the control unit PV to be in alternative units. A user-entered value in P114 is used to convert (scale) the offset-adjusted percentage value (D802) to a new value (D801) that is in the required measurement units.

If the mA input represents a liquid level, simply set P114 to the level represented by 20 mA.

Note

 D801 is the Secondary Value (SV) of the control unit. D801 = (D802/100) * P114

 P114 is not applied if the PV display units (P200) are already configured to be “%”

 P114 is in the menu SETUP / [CONTROLLER /] INPUT CHANNEL / Ch1 Pre Scale

 Read-only parameters D80* are in the menu MONITOR / READINGS

Optional calculation of contents (volumetric) or flow measurement

By selecting a vessel profile or calculation using P113, a level measurement in D801 can be used to calculate a volume measurement or open channel flow rate that is then stored in D851. The programming (configuring) required for this is in “Volumetric contents and flow

measurement applications (advanced users)” on page 52.

Section 4: Getting started

Applying an optional low volume or flow rate cut-off action

The channel 1 output result in D851 can be forced to zero when it falls below a positive threshold, which is a percentage of the maximum flow. Enter the percentage in P117. By default, the setting is “None” to switch off this optional check.

Section 4: Getting started

June 2014

This feature is particularly useful in an open channel flow application where a small standing or remaining liquid level in the channel would cause continued totalizing of flow when no actual flow exists. As a guide, set P117 to a positive value of 2% of maximum flow to overcome this problem.

Note

 P117 is in the menu SETUP / [CONTROLLER /] INPUT CHANNEL / Ch1 Low Cut-off

Applying optional damping to the control unit PV

P210 allows the to smooth out large steps in calculated values (D851).

Note

 P210 is in the menu:

 D851 is in the menu:

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SETUP / [CONTROLLER /] OUTPUT / PV DAMPING / MCU PV DAMPING

MONITOR / DIAGNOSTICS / CHANNELS / Ch1 Output

Section 4: Getting started46

Reference Manual

Conditioning and damping

mA Input

P321

Normalise

mA to %

Input

Source

Select

P111

D842

mA mA

Apply

Input

Offset

P112

Channel

Profile Select

D802

(TV)

D840

Apply

Input

Scaling

P114

%%%

D801

(SV)

P113

Low Cut-off Check

Scaled

Profiles

Non-Linear Profile Post Scale NLP

(PV) D800

4-20mA Limit

Alarm Check

<3.7mA

>20.75mA

P117

P115 P116

D851

(CH1 O/P)

P111 = “mA in”

Damping

P210

Note: Optional damping of mA readings ten times a second: mA = [mA_before + ((mAnow - mA_before)/(1+10 * P321))] Optional damping of control unit PV ten times a second: D800 = [D800before + ((D800now - D800before)/(1+10 * P210))]

Input

Source

Select

P111

D900

Txr

HART

Variables

D901 D902 D903

PV, SV,

TV or FV

P112

Apply

Input

Offset

P114

Apply

Input

Scale

(SV)

D801

(TV)

D802

(FV)

D803

SV, TV and FV

Low Cut-off Check

D800

Profile Select

P113

Scaled

Profiles

Non-Linear

Profile

Post

Scale

NLP

(PV)

Output

Map

P117

P115 P116

D851

(CH1 O/P)

P111 = “Tx1 : PV”

Damping

P210

Note: Optional damping of control unit PV ten times a second: D800 = [D800before + ((D800now - D800before)/(1+10 * P210))]

Input

Source

Select

P121

D900

Txr (Tx2)

HART

Variables

D901 D902 D903

PV, SV,

TV or FV

P122

Apply

Input

Offset

P124

Apply

Input

Scale

(SV)

D801

(TV)

D802

(FV)

D803

Low Cut-off Check

D800

Profile Select

P123

Scaled

Profiles

Non-Linear

Profile

Post

Scale

NLP

(PV)

P127

P150

D851

(CH1 O/P)

P125 P126

D852

(CH2 O/P)

Select

Tx1

Tx2

PV, SV,

TV and FV

PV, SV,

TV and FV

P151

Damping

P210

P121 = “Tx2 : PV”

Note: Optional damping of control unit PV ten times a second: D800 = [D800before + ((D800now - D800before)/(1+10 * P210))]

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Figure 4-16. Transmitter Input Channel 1 for a 4–20 mA input

Section 4: Getting started

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Figure 4-17. Transmitter Input Channel 1 for a HART input

Figure 4-18. Transmitter Input Channel 2 for a HART input

Section 4: Getting started

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4.5.8 Programming Channel 1 for a HART input (advanced users)

This section explains how to program (configure) the operation of the Input Channel 1 on the control unit when a HART transmitter is connected. Read this section together with the graphical overview in Figure 4-17 on page 47.

Note

 Parameters from the HART transmitter are available on the control unit from the SETUP

and MONITOR menus, selectable from the main menu.

Essential parameter to program

Set Input Channel 1 to receive HART digital data from a transmitter

1. Navigate to the Ch1 I/P Source parameter P111:

SETUP / [CONTROLLER /] INPUT CHANNEL / Ch1 I/P Source (on MCU901/3) SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 1 / Ch1 I/P Source (on MCU902)

2. Select Tx1: PV from the option list.

Note

 The built-in Application (App) Wizard is an easy-to-use configuration tool that can be

used to automatically populate values and settings in the input channel parameters.

Navigate to: SETUP / [CONTROLLER /] APPLICATION / App Wizard

 Before using the App Wizard, the Input Channel 1 parameter P111 on the control unit

must be set for a HART input. This is the factory default setting for P111.

Optional parameters and how the HART data is processed

Figure 4-17 on page 47 shows how the HART data is processed through Input Channel 1 and

shows which parameters and processing stages affect the result from Input Channel 1.

HART digital data is continuously read from the transmitter

The HART transmitter digitally communicates pre-calculated values of four HART variables Primary Variable (PV), Secondary Variable (SV), Tertiary Variable (TV), and Fourth Variable (FV) to the MCU900 Series control unit.

Selection of a HART variable as source for further processing

Parameter P111 selects one of the four HART variables (PV, SV, TV, or FV) on the transmitter to be the source for further processing to get a result from Input Channel 1. The un-selected HART variables are mapped to control unit D80x parameters (see Figure 4-17 on page 47).

Note

 In Figure 4-17 on page 47, the selected source is the HART Primary Variable (PV).

Alternatively, Tx1: SV, Tx1: TV, or Tx1: FV can be selected.

 Read-only parameters D80* are in the menu MONITOR / READINGS

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Applying the optional offset adjustment to the selected source

Parameter P112 is a positive, negative, or zero offset for adjustment of the selected HART variable. As an example, this feature may be used to handle a standing level in a tank.

Note

 P112 is in the menu:

SETUP / [CONTROLLER /] INPUT CHANNEL / Ch1 I/P Offset (on MCU901/3) or SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 1 / Ch1 I/P Offset (on MCU902)

Applying the optional scaling and profiling to the selected source

If volumetric or flow values are in the selected HART variable, set parameter P113 to Scaled. Use parameter P114 to convert (scale) the value into units that match the display units you may have selected (P200, P201, P202 or P203, as applicable in SETUP / [CONTROLLER /] DISPLAY).

If level values are in the selected HART variable, parameter P113 can be set to Scaled if wanting just level measurement, and then use parameter P114 as described above. By selecting profile calculation using P113, a level value can be used to calculate a volumetric or open channel flow rate. The programming (configuring) required for this can be found in “Volumetric contents and

flow measurement applications (advanced users)” on page 52.

Note

 P113 and P114 are in the sub-menus /Ch1 Profile and /Ch1 Pre scale at:

SETUP / [CONTROLLER /] INPUT CHANNEL (on MCU901/3) or SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 1 (on MCU902)

Applying an optional low-cut-off action

Note

 P117 is in this menu:

SETUP / [CONTROLLER /] INPUT CHANNEL / Ch1 Low Cut-off (on MCU901/3) or SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 1 / Ch1 Low Cut-off (MCU902)

Applying optional damping to the control unit PV

P210 allows the user to apply damping to smooth out big steps in calculated values in D851.

Section 4: Getting started

Note

 P210 is in the menu:

SETUP / [CONTROLLER /] OUTPUT / PV DAMPING / MCU PV DAMPING

 D851 is in the menu: MONITOR / DIAGNOSTICS / CHANNELS / Ch1 Output

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4.5.9 Programming Channel 2 for a HART input (MCU902 only) (advanced users)

This section explains how to program (configure) the operation of the Input Channel 2 on the control unit when a HART transmitter is connected. Read this section together with the graphical overview in Figure 4-18 on page 47.

Note

 Parameters from the HART transmitter are available on the control unit from the SETUP

and MONITOR menus, selectable from the main menu.

Essential parameter to program

Set Input Channel 2 to receive HART digital data from a transmitter

1. Navigate to:

SETUP / [CONTROLLER /] INPUT CHANNEL / [CHANNEL 2 /] Ch2 I/P Source for the Ch2 I/P Source parameter P121.

2. Select Tx2: PV from the option list.

Note

 The built-in Application (App) Wizard is an easy-to-use configuration tool that can be

used to automatically populate values and settings in the input channel parameters.

Navigate to: SETUP / [CONTROLLER /] APPLICATION / App Wizard

 Before using the App Wizard, the Input Channel 2 parameter P121 on the control unit

must be set for a HART input. This is the factory default setting for P121.

Optional parameters and how the HART data is processed

Figure 4-18 on page 47 shows how the HART data is processed through Input Channel 2 and

shows which parameters and processing stages affect the result from Input Channel 2.

HART digital data is continuously read from the transmitter

Selection of a HART variable as source for further processing

Parameter P121 selects one of the four HART variables (PV, SV, TV, or FV) on the transmitter to be the source for further processing to get a result from Input Channel 2. The un-selected HART variables are mapped to control unit D80x parameters.

Note

 In Figure 4-18 on page 47, the selected source is the HART Primary Variable (PV).

Alternatively, Tx2: SV, Tx2: TV, or Tx2: FV could have been selected.

 Read-only parameters D80* are in the menu MONITOR / READINGS

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Applying the optional offset adjustment to the selected source

P122 is a positive, negative, or zero offset for adjustment of the selected HART variable.

As an example, this feature may be used to accommodate a standing value of level in a tank.

P122 is in the menu SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 2 / Ch2 I/P Offset.

Applying the optional scaling and profiling to the selected source

If volumetric or flow values are in the selected HART variable, set parameter P123 to Scaled. Use parameter P124 to convert (scale) the value into units that match the display units you may have selected (P200, P201, P202, or P203, as applicable in SETUP / [CONTROLLER /] DISPLAY).

If level values are in the selected HART variable, parameter P123 can be set to Scaled if wanting just level measurement, and then use parameter P124 as described in the paragraph above. By selecting profile calculation using P123, a level value can be used to calculate a volumetric or open channel flow rate. The programming (configuring) required for this can be found in

“Volumetric contents and flow measurement applications (advanced users)” on page 52.

Note

 P123 and P124 are in the sub-menus /Ch2 Profile and /Ch2 Pre scale at:

SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 2

Applying an optional low-cut-off action

The channel 2 output result in D852 can be forced to zero when it falls below a positive threshold, which is a percentage of the maximum flow. Enter the percentage in P127. By default, the setting is “None” to switch off this optional check.

This feature is particularly useful in an open channel flow application where a small standing or remaining liquid level in the channel would cause continued totalizing of flow when no actual flow exists. As a guide, set P127 to a positive value of 2% of maximum flow to overcome this problem.

Note

 P127 is in this menu:

SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 2 / Ch2 Low Cut-off

Applying optional damping to the control unit PV

P210 allows the user to apply damping to smooth out big steps in calculated values in D852.

Note

 P210 is in the menu:

SETUP / [CONTROLLER /] OUTPUT / PV DAMPING / MCU PV DAMPING

 D852 is in the menu: MONITOR / DIAGNOSTICS / CHANNELS / Ch2 Output

Section 4: Getting started

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4.5.10 Volumetric contents and flow measurement applications (advanced users)

Sections 4.5.11 to 4.5.17 are for advanced users. They explain in-depth how the can be set-up to use level measurements to calculate:

 the volumetric contents of a linear (uniform) shaped, covered vessel

 the volumetric contents or a non-linear (non-uniform) shaped, covered vessel

 flow in non-linear (non-uniform) shaped open channels, which can then be totalized

 flow in pre-programmed open channel flumes, which can then be totalized

The control unit has a built-in library of popular vessel profiles for volume of contents calculations and standard open channel profiles for flow calculations.

For other vessel and channel profiles, see “Set-up flow calculations for non-linear / non-uniform

open channel profiles (advanced users)” on page 56.

4.5.11 Set-up the volumetric contents calculations for a popular linear / uniform vessel (advanced users)

The MCU900 Series control unit can use level measurements to calculate the volumetric

contents of a linear (uniform) shaped, closed vessel e.g. a vertical cylinder or rectangular vessel.

Essential parameters to program

Set-up volumetric contents calculations for a linear (uniform) vessel

Parameter P113 (or P123) must be set to Scaled, which establishes that the volume of the vessel contents is linearly derived from the liquid level measured by a transmitter (D801).

Parameter P114 (or P124) must be set to:

 the maximum contents volume of the vessel (if 4–20 mA level transmitter is used) or

 the cross-sectional area of the vessel per unit of level measurement

(if a HART level transmitter is used)

Note

 For a 4–20 mA transmitter measuring level, the volume is calculated as:

D851 = D801 where D801 = (D802 / 100) * P114

 For a HART level transmitter measuring level for Input Channel 1, the volume is

calculated as: D851 = (P114 * Level measurement after offset P112 is applied)

 For a HART level transmitter measuring level for Input Channel 2, the volume is

calculated as: D852 = (P124 * Level measurement after offset P122 is applied)

 P113 and P114 are in sub-menus /Ch1 Profile and /Ch1 Pre scale at:

SETUP / [CONTROLLER /] INPUT CHANNEL (on MCU901/MCU90F) or SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 1 (on MCU902)

 P123 and P124 are in sub-menus /Ch2 Profile and /Ch2 Pre scale at:

SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 2 (on MCU902)

 Read-only parameters D80* are in the menu MONITOR / READINGS

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4.5.12 Set-up the volumetric contents calculations for a popular non-linear / non-uniform shaped vessel (advanced users)

The MCU900 Series control unit can use level measurements to calculate the volumetric contents or a non-linear (non-uniform) shaped, closed vessel.

The control unit has a library of popular non-linear vessel shapes:

 Horizontal cylinder with flat ends

 Spherical vessel

 Horizontal cylinder with domed ends

Examples of popular applications are shown in Figure 4-19 on page 55.

Note

 For other vessel shapes, see “Set-up flow calculations for non-linear / non-uniform open

channel profiles (advanced users)” on page 56.

Essential parameters to program

Select a popular non-linear vessel shape

Use parameter P113 (or P123) to select a non-linear vessel shape from the option list. The control unit then automatically populates P115 (or P125) with data from the built-in library.

The volumetric contents calculations for these non-linear profiles require an input value over the range 0.0 to 1.0. Parameter P114 (or P124) is therefore used to convert (scale) the input signal to a value within the range 0.0 to 1.0 for the volume calculation.

Note (MCU901/MCU90F)

 P113, P114, and P115 are in the menus SETUP / [CONTROLLER /] INPUT CHANNEL

/Ch1 Profile, /Ch1 Pre scale, and /Ch1 NLP Data respectively

Note (MCU902)

 P113, P114, and P115 are in these menus:

SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 1 / Ch1 Profile, /Ch1 Pre scale, and /Ch1 NLP Data (respectively)

 P123, P124, and P125 are in these menus:

SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 2/ /Ch2 Profile, /Ch2 Pre scale, and /Ch2 NLP Data (respectively)

Section 4: Getting started

Setting P114 when a 4–20 mA level transmitter is connected

The 4–20 mA level transmitter should ideally provide a mA signal that is already scaled for the full vessel height. P114 (or P124) can then be kept set at the default value of 1.0.

If the mA signal is not scaled for the full vessel height, P114 (or P124) must be programmed with a value to convert (scale) the mA signal to be in the range 0.0 to 1.0. For example, if the maximum current is below 20 mA for a full vessel, say 18 mA, set P114 = 16 * (18 - 4) = 1.143

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Setting P114 (or P124) when a HART level transmitter is connected

The maximum level measurement from the HART transmitter must be equal to the height of the liquid when the vessel is full.

The level measurement, after any input offset has been applied, must be re-scaled to the range

0.0 to 1.0 ready for input to the NLP calculation.

For example, if the level measurement range is 0.0 to 4.0, set P114 = (1.0 / 4.0) = 0.25

Setting P116 (or P126) to the maximum volume of the vessel

Parameter P116 (or P126) must be programmed with the volume of the contents in a full vessel in the units chosen (P200, P201, P202, or P203, as applicable to the transmitter input channel).

The level measurement value, which is now in the range 0.0 to 1.0, is multiplied by the P116 (or P126) value to get the volume of the contents. The resulting volume is then passed to the optional low volume cut-off action. See pages 45, 49, or 51, as applicable.

Note (MCU901/MCU90F)

 P116 is in the menu SETUP / [CONTROLLER /] INPUT CHANNEL / Ch1 Post Scale

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 P20x parameters are in the menu SETUP / [CONTROLLER /] DISPLAY

Note (MCU902)

 P116 is in this menu:

SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 1/ Ch1 Post Scale

 P126 is in this menu:

SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 2/ Ch2 Post Scale

 P20x parameters are in the menu SETUP / [CONTROLLER /] DISPLAY

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P113/P123 = Spherical

P114/P124 = (1.0 / Diameter of tank) P115/P125 = Plotted non-linear profile of tank P116/P126 = Full volume of ideal spherical tank

P113/P123 = Horiz Cyl Flat (Horizontal Cylinder, Flat Ends, Slope Ignored)

P114/P124 = (1.0 / Diameter of tank) P115/P125 = Plotted non-linear profile of tank P116/P126 = Full volume of ideal c ylindrical tank

P113/P123 = Conical

P114/P124 = (1.0 / Maximum level) P115/P125 = Plotted non-linear profile of tank P116/P126 = Full volume of ideal conical tank

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Figure 4-19. Examples of popular non-linear (non-uniform) vessel applications

Section 4: Getting started

June 2014

Note

 The non-linear profile (NLP) is plotted automatically when editing P113 / P123

manually or when using the Application (App) Wizard, except for the Conical NLP. Menu: SETUP / [CONTROLLER /] APPLICATION / App Wizard

 P115 / P125 is plotted with a simple cone if P113 / P123 is set to Conical manually.

Section 4: Getting started

June 2014

Reference Manual

IP2030/RM, Rev AA

4.5.13 Set-up flow calculations for non-linear / non-uniform open channel profiles (advanced users)

The MCU900 Series control unit can use level measurements to calculate flow in open channels, which can then be totalized. The control unit has a library of popular non-linear profiles for flow:

 Flume 3/2

 V-Notch 5/2

 Manning formula

Figure 4-20 on page 57 shows a typical open channel flow structure.

Essential parameters to program

Note

 P200 (PV units) must be changed from % to the required units of measurement.

The parameter P200 is in the menu SETUP / [CONTROLLER /] DISPLAY

Select a standard non-linear open channel profile

Use P113 (or P123) to select V Notch (5/2), Flume (3/2) or Manning from the option list. The control unit then automatically populates P115 (or P125) with data from the built-in library.

The flow calculations for these non-linear profiles require an input value over the range 0.0 to

1.0. Parameter P114 (or P124) is therefore used to convert (scale) the input signal to be a value within the range 0.0 to 1.0 for the flow calculation.

Note (MCU901/MCU90F)

 P113, P114, and P115 are in the menus SETUP / [CONTROLLER /] INPUT CHANNEL

/Ch1 Profile, /Ch1 Pre scale, and /Ch1 NLP Data respectively

Note (MCU902)

 P113, P114, and P115 are in these menus:

SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 1 / Ch1 Profile, /Ch1 Pre scale, and /Ch1 NLP Data (respectively)

 P123, P124, and P125 are in these menus:

SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 2/ /Ch2 Profile, /Ch2 Pre scale, and /Ch2 NLP Data (respectively)

Note

 When using the App Wizard, select V-Notch Weir (5/2), Flume/Weir (3/2), or

Manning at the prompt for a profile. This populates parameter P113 (or P123).

Setting P114 (or P124) when a 4–20 mA level transmitter is connected

The 4–20 mA level transmitter should ideally provide a mA signal that is already scaled for the full level range expected in the flow channel. P114 (or P124) can then be kept set at the default value of 1.0.

Section 4: Getting started56

Reference Manual

P113 = “Flume (3/2)” (using 3/2 power law) (To BS3680)

P114 = (1.0 / Maximum height of flow in channel) P115 = Plotted non-linear profile of channel P116 = Maximum flow at maximum flow height

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Section 4: Getting started

June 2014

If the mA signal is not scaled for the full level range of the channel, P114 (or P124) must be programmed with a value to convert (scale) the mA signal to be a value in the range 0.0 to 1.0. For example, if the maximum current is below 20 mA for a full channel, say 12 mA, set P114 = 16 * (12 - 4) = 2.

Setting P114 (or P124) when a HART level transmitter is connected

The maximum level measurement from the HART transmitter must be equal to the height of the liquid when the channel is full.

The level measurement, after any input offset has been applied, must be re-scaled to the range

0.0 to 1.0 ready for input to the NLP calculation.

For example, if the level measurement range is 0.0 to 1.5 m, set P114 = (1.0 / 1.5) = 0.667

Setting P116 (or P126) to the maximum flow expected in the channel

Finally, parameter P116 (or P126) must be programmed with the maximum flow expected in the channel, which will occur at the maximum liquid level in the channel.

The control unit Primary/Process Value (D800) for the flow rate is derived by applying the normalized transmitter input (range 0.0 to 1.0) to the profile, and then converting (scaling) by parameters P114 and P116 (or P124 and P126).

Figure 4-20. Example of a non-linear open channel profile

Section 4: Getting started

June 2014

Reference Manual

IP2030/RM, Rev AA

4.5.14 Set-up open channel flow calculations for pre-programmed flat, parabolic, and Parshall flumes (advanced users)

The MCU900 Series control unit has a library of data to set-up open channel flow calculations with flat, parabolic, and Parshall flumes.

Essential parameters to program

Note

 Flow calculations require the transmitter input channel(s) to be providing continuous

level measurements (see page 43). Also, P200 (control unit PV units) must be changed from the default % to the required flow measurement units.

Select a flume

Use parameter P113 (or P123) to select a flume from the option list. The control unit then automatically populates parameter P115 (or P125) with data from the built-in library.

The control unit uses P115 (or P125) in a different way to when a plotted profile is required. For flat and parabolic flumes, it is used to store values for the flow calculation in cubic metres per

hour (m

Q = k x (h x mul)

/hour) where flow Q is given by:

Pwr

where h is the height of channel flow, and k and Pwr are factors.

When a flat or parabolic flume is selected, P115 / P125 (Pwr, k, and mul factors) and P116 /

P126 are populated for measuring flow in metric units of cubic metres per hour (m

/hour).

When a Parshall flume is selected, P115 / P125 (Pwr, k, and mul factors) and P116 / P126 are populated for measuring flow in imperial units of US gallons per minute (GPM).

For flow measurement in alternative units, with automatic scaling of the control unit PV, use the App Wizard (menu: SETUP / [CONTROLLER /] APPLICATION / App Wizard). The choice of units offered depends on whether the transmitter is measuring in metric or imperial units.

Note

 This modified version of the standard “Q=k x h

Pwr

”flow formula allows the use of a multiplier (mul) factor. This extra factor can account for irregularities or errors in the flow structure, but should only be manually entered where errors can be quantified.

 Pre-defined values for factors k, mul and Pwr of each standard flow structure in the

library are shown in Table 4-1 on page 60 and Table 4-2 on page 60. Depending on the derivation of k and the level units, the h value is scaled by a different mul factor.

 Experienced users may wish to manually enter the values of k, mul or Pwr for specific

applications. To edit these, set P113/P123 to be “Flume***” and then edit k, mul or Pwr at parameter P115/P125. Use the DOWN-ARROW button to display the mul value.

 When a flume is selected from this list, the MCU900 Series control unit also populates

parameters P400 and P401 (Current Output span), P530 (Totalizer factor), and P531 (Totalizer units of m3 or galx100).

Section 4: Getting started58

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Section 4: Getting started

June 2014

Note (MCU901/MCU90F)

 P113, P115, and P116 are in the menus SETUP / [CONTROLLER /] INPUT CHANNEL

/Ch1 Profile, /Ch1 NLP Data, and /Ch1 Post Scale respectively

Note (MCU902)

 P113, P115, and P116 are in the menus SETUP / [CONTROLLER /] PV CALCULATION /

CHANNEL 1 / Ch1 Profile, /Ch1 NLP Data, and /Ch1 Post Scale respectively

 P123, P125, and P126 are in the menus SETUP / [CONTROLLER /] PV CALCULATION /

CHANNEL 2 /Ch2 Profile, /Ch2 NLP Data, and /Ch2 Post Scale respectively

Note

 When using the App Wizard, select Parshall or Vlarem at the prompt for a profile, and

the next prompt then allows selection of the pre-defined calculation e.g. Flume Flat 1

4.5.15 Set-up Kindsvater Shen (V-notch ISO1438) flow calculations

P113/P123 = “Kindsvater Shen”

This flow calculation requires just the angle of the V-notch to be entered in parameter P115 (or P125) to calculate a flow value over the weir. The head level measurement needs to be in

units of metres and the resultant flow value is in cubic metres per second (m

Note

 Flow calculations require the transmitter input channel(s) to be providing continuous

level measurements (see page 43). Also, P200 (control unit PV units) must be changed from the default % to the required flow measurement units.

 When using the App Wizard, select V-Notch (ISO1438) at the prompt for a profile.

The App Wizard allows the selection of alternative flow units for the output result.

4.5.16 Set-up exponential flow law calculations

P113/P123 = “Flow calculation”

Exponential laws are supported by selecting this profile option, and manually entering values of k-factor, power, and mul into parameters P115 (or P125).

The output is derived from the input value using: Q = k x (mul x Input)

As an example, consider a an application with a rectangular weir and level measurements in ft. When the flow rate (Q) is 2000 GPM, the gauged head (Input) is known to be 0.792 feet. Ter ms mul is 1.000 and pwr is 1.5 for a rectangular weir.

pwr

/s).

Section 4: Getting started

Therefore, k is calculated as Q / (mul x Input)

pwr

) = 2000 / (1 * 0.792)

1.5

= 2837.5

Note

 Flow calculations require the transmitter input channel(s) to be providing continuous

level measurements (see page 43). Also, P200 (control unit PV units) must be changed.

Section 4: Getting started

June 2014

Table 4-1. Pre-programmed flow calculation factors (Vlarem – flat and parabolic flumes)

Profile (P113/P123) k (P115 or P125) Pwr (P115 or P125) Mul (P115 or P125) P116 (or P126)

Flume Flat 1 0.1347877 1.5 0.01 3600.0 Flume Flat 2 0.1782664 1.5 0.01 3600.0 Flume Flat 3 0.3134177 1.5 0.01 3600.0 Flume Flat 4 0.5417157 1.5 0.01 3600.0 Flume Flat 5 0.8111058 1.5 0.01 3600.0 Flume Flat I 0.1322 1.5 0.01 3600.0 Flume Flat II 0.1777 1.5 0.01 3600.0 Flume Flat III 0.21758 1.5 0.01 3600.0 Flume Flat III bis 0.32835 1.5 0.01 3600.0 Flume Flat III ter 0.272 1.5 0.01 3600.0 Flume Flat IV 0.3521726 1.5 0.01 3600.0 Flume Flat V 0.442932 1.5 0.01 3600.0 Flume Flat V bis 0.4005 1.5 0.01 3600.0 Flume Flat VI 0.4990569 1.5 0.01 3600.0 Flume Flat VII 0.6237 1.5 0.01 3600.0 Flume Flat VIII 0.88116 1.5 0.01 3600.0 Flume Flt VIII bis 0.798 1.5 0.01 3600.0 Flume Flat IX 1.065186 1.5 0.01 3600.0 Flume Flat IX bis 0.8148 1.5 0.01 3600.0 Flume Flat X 1.3222761 1.5 0.01 3600.0 Flume Flat X bis 1.609 1.5 0.01 3600.0 Flume Flat X ter 1.064884 1.5 0.01 3600.0 Flume Flat XI 1.65099 1.5 0.01 3600.0 Flume Para 1 0.39885 2.3 0.01 3600.0 Flume Para 2 0.44187 2.3 0.01 3600.0 Flume Para 3 0.46362 2.2 0.01 3600.0 Flume Para 4 0.54419 2.2 0.01 3600.0 Flume Para 5 0.61851 2.1 0.01 3600.0 Flume Para 6 0.71726 2.1 0.01 3600.0 Flume Para 7 0.77152 2.1 0.01 3600.0 Flume*** (User) (User) (User) 3600.0

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IP2030/RM, Rev AA

Note

 Vlarem flumes most commonly are used for open channel flow applications in Belgium.

When selecting a Vlarem flume from the above list, the PV flow units are automatically set to m3/hr and the display configured to show the SV (level in cm on top line) and totaliser in m3 (on bottom line). The transmitter base units must be set to metres

Table 4-2. Pre-programmed flow calculation factors (Parshall flumes)

Profile (P113/P123) Pwr (P115 or P125) k (P115 or P125) mul (P115 or P125) P116 (or P126)

Parshall 1 in 1.550 151.7 1.0 1.0 Parshall 2 in 1.550 303.4 1.0 1.0 Parshall 3 in 1.547 445.2 1.0 1.0 Parshall 6 in 1.580 924.5 1.0 1.0 Parshall 9 in 1.530 1378 1.0 1.0 Parshall 1 ft 1.522 1795 1.0 1.0 Parshall 1.5 ft 1.538 2693 1.0 1.0 Parshall 2 ft 1.550 3590 1.0 1.0 Parshall 3 ft 1.566 5386 1.0 1.0 Parshall 4 ft 1.578 7181 1.0 1.0 Parshall 5 ft 1.587 8976 1.0 1.0 Parshall 6 ft 1.595 10770 1.0 1.0 Parshall 8 ft 1.607 14360 1.0 1.0 Parshall 10 ft 1.600 17672 1.0 1.0 Parshall 12 ft 1.600 20982 1.0 1.0

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Reference Manual

Note: The Mobrey MCU901 screens are shown here.

Note: The SELECT INSTRUMENT menu does not appear unless a HART transmitter is connected.

IP2030/RM, Rev AA

Section 4: Getting started

4.5.17 Using a plotted profile for calculating volume or flow

When parameter P113 (or P123) is set to “special”, the parameter P115 (or P125) is used for defining a 20-point look-up table that represents the profile of a vessel or open flow channel that is not in the control unit library.

Note

 When using the App Wizard, select 20 point look-up at the prompt for a profile.

Each point is a Cartesian co-ordinate (X, Y). The X value represents a level, and the Y value is the corresponding volume or flow rate. The X points are at user-defined intervals, typically in equal increments (5%) of maximum height.

These X points may be entered as levels (in the same units as the transmitter) and the Y points entered as the corresponding volumes or flow rates for those levels (in the same units as selected for the control unit Primary/Process Value). See Figure 4-21 on page 61, right-hand graph.

Parameters P114 (or P124) and P116 (or P126) need only be set to 1.0 for this method. The volume or flow rate for the control unit PV is then derived from the plotted profile using the live level measurements and interpolation between the plot points.

June 2014

The X and Y points can also be converted (normalized) to be in the range 0.0 to 1.0 before being entered manually (see Figure 4-21 on page 61, left-hand graph). A value is then derived from the plotted profile using the live level measurements that are already converted (normalized) by the Transmitter Input Channel processing. Parameter P116 (or P126) is then applied to the derived value to obtain the volume or flow rate for the control unit PV.

Note (MCU901/MCU90F)

 P113 to P116 are in the menus SETUP / [CONTROLLER /] INPUT CHANNEL

/ Ch1 Profile, / Ch1 Pre scale, / Ch1 NLP Data, and / Ch1 Post Scale

Note (MCU902)

 P113 to P116 are in the menus SETUP / [CONTROLLER /] PV CALCULATION /

CHANNEL 1 / Ch1 Profile, / Ch1 Pre scale, / Ch1 NLP Data, and / Ch1 Post Scale

 P123 to P126 are in the menus SETUP / [CONTROLLER /] PV CALCULATION /

CHANNEL 2 / Ch2 Profile, / Ch1 Pre scale, / Ch2 NLP Data, and / Ch2 Post Scale

Figure 4-21. How to navigate to the P115 parameter screen

MAIN MENU

SETUP

Run App? MONITOR

SELECT INSTRUMENT

Controller: ****

Tx1 : **** #1

DISPLAY OUTPUT

INPUT CHANNEL

SETUP

Ch1 Profile Ch1 Pre Scale

Ch1 NLP Data

INPUT CHANNEL

Ch1 NLP Data P115 x0: 0.000 y0: 0.000

Section 4: Getting started

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

0.0

200.0

400.0

600.0

800.0

1000.0

1200.0

1400.0

1600.0

1800.0

2000.0

0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0

0.0

Normalized units (range 0.0 to 1.0) Actual level (X) and volume (Y) units

June 2014

Figure 4-22. Examples of plotted profile for a spherical vessel

Reference Manual

IP2030/RM, Rev AA

How to edit the 'look-up' table (P115/P125)

1. Parameter P113/P123 must first be set to be “Special”.

2. Navigate to the P115/P125 parameter screen (see Figure 4-21 on page 61).

3. Press the red (ENTER) button once to select point 0.

Before editing, you can use the DOWN-ARROW button to page down to another point or use the Esc button to return to the menu.

4. With X0: highlighted, use the RIGHT-ARROW button to move across to the X0 value.

5. Use the UP-ARROW or DOWN-ARROW buttons to edit the X0 value.

6. Press the red (ENTER) button once to confirm the new X0 value.

7. With Y0: highlighted, use the RIGHT-ARROW button to move across to the Y0 value.

8. Use the UP-ARROW or DOWN-ARROW buttons to edit the Y0 value.

9. Press the red (ENTER) button once to confirm the new Y0 value.

10. To edit X0 and Y0 again, return to step 2. Otherwise, use the DOWN-ARROW button to display the page with X1 and Y1 or use the Esc button to return to the menu.

11. Repeat for all points in the profile.

An X point with 0.0 terminates the profile (unless it is point X0, Y0).

Note

 The Esc button can be used during editing to abort and restore the original values; it

needs to be pressed again to move back to the 'X' or 'Y' text

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4.5.18 Digital inputs IN1 and IN2

Digital inputs IN1 and IN2 can be programmed to perform an action whenever they are triggered.

Note

 See for “Digital control voltage-free contact inputs” on page 21 terminal connections.

 Digital input IN1 and IN2 statuses are shown on the left-hand side of the display:

o = inactive or = active.

 Parameter D835 shows the statuses of the inputs: active (1) or inactive (0).

First digit represents IN1. The second digit represents IN2.

How to allocate an action to IN1 or IN2:

1. Navigate to:

SETUP / [CONTROLLER /] DIGITAL INPUT / DIGITAL INPUT 1 or / DIGITAL INPUT 2

2. Use the Action selection parameter P340 (for IN1) or P345 (for IN2) to select a trigger action from the option list. Tab l e 4 -3 lists all the options and explains their purpose.

Section 4: Getting started

June 2014

3. Use the Delay parameter P341 (for IN1) or P346 (for IN2) if a delay is needed before an action is performed. The setting format is m:s (minutes and seconds).

4. Use the On State parameter P342 (IN1) or P347 (IN2) to change the logic of the input for triggering an action. Options are:

“Closed” (default) – an action is triggered when the voltage-free contact is closed, or “Open” – an action is triggered when the voltage-free contact is open.

Table 4-3. Digital input actions

Action Action that occurs while digital input is triggered

Free Digital Input has no allocated action. This is the factory default setting.

(1)

Alarm

(2)

Fau lt Program mode Changes the control unit operating mode to Program (open padlock). Hold totalizer Freezes the internal totalizer. Hold MCU PV Prevents the control unit PV value (D800) from being updated. Suppress Alarm If the digital input is active when an alarm condition is present, a message is displayed

Display Msg Log Input

Pump-down Lock Params Prevent 'P' prefixed parameters from being edited. Protect totalizer 1 Prevent totalizer 1 from being reset. Reset totalizer 2

(1) See“Set-up alarms” on page 91 for information about alarms and features they affect. (2) See “Fault mode relay” on page 82 for how to indicate fault conditions using a relay output. (3) SETUP / [CONTROLLER /] APPLICATION/ Message. (4) Data logging is available on the Mobrey MCU90F. (5) The pump-down feature available on the Mobrey MCU901 and Mobrey MCU902. See “Pump-down (Mobrey MCU901 and MCU902

(6) Totalizer 2 is available on the Mobrey MCU902 and Mobrey MCU90F.

(3)

(4)

(5)

only)” on page 85 for further information.

Forces an alarm condition, which is indicated if specified in the OUTPUT / ALARM menu. Forces an fault condition, which is indicated if specified in the OUTPUT / FAULT menu.

indicating the alarm is being overridden. The Alarm relay is held on. Displays a user-defined message (P241). When the next data logging interval elapses, flag the data logged as a 'bad sample' if the digital input has been active. Invoke a pump-down operation.

(6)

Reset totalizer 2.

Section 4: Getting started

June 2014

4.5.19 Data logging on the Mobrey MCU90F

The Mobrey MCU90F can record (log) up to 7000 events at regular intervals.

 Each event is a parameter value. The parameter to be recorded (logged) is the one

selected for the middle section of the display (see Figure 2-4 on page 7).

This parameter-to-be-logged is typically the control unit Primary/Process Variable (PV).

 If the MCU90F has been set-up to totalize, the daily value of the totalizer at midnight is

also logged. Up to 60 midnight totalized values are held in memory. This is in addition to the memory for 7000 events.

 The maximum value of the parameter-to-be-logged in each 24-hour period is also

logged.

The MCU90F gives a visual indication that logging of data is underway by flashing “LOG” in the bottom, right-hand corner of the Full PV Display.

Note

 Logged data may be downloaded at any time using the RS232 data download socket,

supplied with a Mobrey MCU90F (see “RS232 connections” on page 22), and Mobrey LOG-VIEW software running on a Windows PC.

Reference Manual

IP2030/RM, Rev AA

 See “Serial communications” on page 104 for RS232 communication parameters.

Menu: SETUP / [CONTROLLER /] LOGGING

P590 Log Interval (Default is 15 minutes)

 The logging interval is the period over which the parameter-to-be-logged is sampled

every five seconds and then averaged at the end. The averaged value is then logged.

An interval value of 15 minutes logs the averaged value at 15-minute intervals, which equates to 50 days elapsed time.

P591 Fast Log (Fast log mode) (Default is 0)

 If the parameter-to-be-logged value is higher than a user-entered value (P591),

the MCU90F automatically moves to a fast log mode.

The parameter-to-be-logged is then logged once every minute until the logged value is less than P591. Fast logged values are tagged for easy identification when examining logged data.

P593 Low Mem Alarm (Default is 0%)

 An alarm can be raised to indicate when the unused memory falls to below a

user-defined percentage (P593). See “Set-up alarms” on page 91 for selecting if this alarm is indicated by a relay output, driving the output current to a set level, or both.

When the memory is full, logged data is either overwritten or the data logging stops, as determined by parameter P592.

 Parameter D846 shows the percentage of free memory remaining for data logging.

P592 Data Overwrite (Default is “On”)

 After the logging memory is full, there is a choice to continue data logging and

overwrite the oldest data (On) or to stop data logging (Off).

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Reference Manual

MAIN MENU

Run App? MONITOR

SETUP

SELECT INSTRUMENT

Tx1: ****

Controller: ****

SETUP

DISPLAY OUTPUT

LOGGING

Log Interval Fast Log

Logging Wizard

ESC=Quit =Start

Note: The SELECT INSTRUMENT menu does not appear unless a HART transmitter is connected.

LOGGING

Log Interval Fast Log

Logging Wizard

LOGGING

Data Overwrite Low Mem Alarm

Fast Log

Log Interval P590 0 min Esc=Quit =Edit

Fast Log P591

0.0000 m Esc=Quit =Edit

Data Overwrite P592 On Esc=Quit =Edit

Low Mem Alarm P593 0 % Esc=Quit =Edit

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Starting, stopping and resetting the logger

To start data logging, change the logging interval (P590) from 0 to the interval required. Logging is now activated.

Changing the logging interval from 0 to a logging interval in minutes will clear all data logged (i.e. clear the 7000 event-memory plus the 60 midnight totals).

Changing the log interval from a non-zero interval (e.g. 15 minutes) to a new non-zero interval (e.g. 5 minutes) will clear the 7000 event-memory).

To stop data logging, change the logging interval (P590) back to 0. Note, when the data logging interval is re-set, all logged data will be cleared from the logging memory.

Figure 4-23. Navigating to the LOGGING Menu

Section 4: Getting started

Figure 4-24. Menu map for LOGGING screens

Section 4: Getting started

Logging Wizard

ESC=Quit =Start

Set Interval 15 min

Set fast LOG trip

000000 m

Overwrite old data

Yes

LOG Digital input(s)

None

Options *

Yes

Options *

None

Both

Note A

(Edits 15 to be 05)

(None)

(Yes)

(1)

Exit to the menu system

June 2014

Using the Logging Wizard to set-up data logging of level measurements

The Logging Wizard is the easiest way to set-up the data logging feature after the main application is set-up.

As an example, consider data logging of the control unit PV value (D800) every 5 minutes; the control unit PV is a level measurement in metres. When that level measurement is at one metre or more, the Fast Log mode is required to activate. When the memory is full, old data is overwritten.

1. Navigate to the Logging Wizard screen in the menu system (Figure 4-23 on page 65).

2. Start the Logging Wizard by pressing the red (ENTER) button once.

3. Work through the wizard prompts (Figure 4-25) until the menu system re-appears.

4. Change the operating mode to Run App (Figure 4-12 on page 38).

Reference Manual

IP2030/RM, Rev AA

Change the operating mode to Program (Figure 4-12 on page 38), if prompted.

Key presses for the wizard example are provided alongside the prompts.

5. Press the Esc button repeatedly until the Full PV Display appears. In the bottom-right of the display is now the word LOG, flashing to indicate that data logging is operating.

Figure 4-25. Logging wizard example with data logging of level measurements

A. Measurement units for this wizard are dependent on control unit PV display units selected using parameter P200.

Section 4: Getting started66

Reference Manual

Logging Wizard

ESC=Quit =Start

Set Interval 15 min

Set fast LOG trip

000000 m

/s1

Overwrite old data

LOG Digital input(s)

None

Memory Alarm Limit

00 %

Memory filling alarm

Relay

Select Relay

Options *

Yes

Options *

None

Relay

Current

Both

Options *

Note A

Exit to the menu system

(15)

(1)

(No)

(Relay)

(4)

(10)

(None)

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Section 4: Getting started

June 2014

Using the Logging Wizard to set-up of flow measurements

The Logging Wizard is the easiest way to set-up the data logging feature after the main application is set-up.

As an example, consider data logging of the control unit PV value (D800) every 15 minutes; the control unit PV is a flow measurement in cubic metres per second. When the flow measurement is at 1 cubic metre per second or more, the Fast Log mode is required to activate. When the memory is at 90% of capacity, a relay is activated instead of overwriting old data.

1. Navigate to the Logging Wizard screen in the menu system (Figure 4-23 on page 65).

2. Start the Logging Wizard by pressing the red (ENTER) button once. Change the operating mode to Program (Figure 4-12 on page 38), if prompted.

3. Work through the wizard prompts (Figure 4-26) until the menu system re-appears. Key presses for the wizard example are provided alongside the prompts.

4. Change the operating mode to Run App (Figure 4-12 on page 38).

5. Press the Esc button repeatedly until the Full PV Display appears. In the bottom-right of the display is now the word LOG, flashing to indicate that data logging is operating.

Section 4: Getting started

Figure 4-26. Logging wizard example with data logging of flow measurements

A. Measurement units for this wizard are dependent on control unit PV display units selected using parameter P200.

Section 4: Getting started

June 2014

4.5.20 Set-up the current output

The Current Output is for transmitting the control unit PV value (D800) as a 4–20 mA signal. The output is calculated by using the range values of parameters P400 and P401.

Example

Consider a control unit PV value of 5 metres and the PV range is 0 to 10 metres:

 0 metres is represented by a 4 mA signal (0%)

 5 metres is represented by a 12 mA signal (50%)

 10 metres is represented by 20 mA signal (100%)

Therefore, the Current Output would output the PV value 5 metres as a 12 mA signal.

Note

The current output is frozen while the control unit is in the Program operating mode.

Menu: SETUP / [CONTROLLER /] OUTPUT / CURRENT OUTPUT

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IP2030/RM, Rev AA

P400 Low Range Val (Factory default is 0.0)

 This is the minimum control unit PV value represented by 4 mA.

P401 Up Range Val (Factory default is 100.0)

 This is the maximum control unit PV value represented by 20 mA.

P402 Alarm Actions (Factory default is 3.6 mA)

 Optional for determining how an alarm, if selected in the ALARM menu, is indicated on

the Current Output. Options for P402 are:

3.6 mA – fix current output to 3.6 mA to force a low current limit alarm.

Hold – freeze the current output at the present value.

21 mA – fix current output to 21 mA to force high current limit alarm.

See also Table 4-8 on page 94 for a summary of reporting methods for Alarms.

Note

 The 3.6 mA and 21 mA options are the Mobrey Standard.

 There is another alarm condition when the current output has reached the linear limit

i.e. saturated. For the Mobrey Standard, this is  3.8 mA or  20.5 mA.

P404 mA Mode (Factory default is “Instantaneous”)

 On the Mobrey MCU90F, this optional parameter is for assigning the Current Output to

follow a rolling average of the calculated control unit PV (typically flow). To do this, select the Rolling option.

The time period for the rolling averaging is defined using P590, which is also for defining the logging interval (see “Data logging on the Mobrey MCU90F” on page 64).

Section 4: Getting started68

Reference Manual

Note: The SELECT INSTRUMENT menu does not appear unless a HART transmitter is connected.

Note: The Mobrey MCU901 screens are shown here.

IP2030/RM, Rev AA

P210 MCU PV Damping (Factory default is 0)

 This is used to apply damping to smooth out big steps in calculated control unit

Primary/Process values (PV).

4.5.21 Set-up the relays

An overview of the relay functions

Relays 1 to 4 are normally On Point / Off Point control relays which may be used to start/stop pumps or open/close valves at different level points. The relay energizes at one level point and then de-energizes at a different level point.

Relays can also be programmed as Out-of-limit Alarm relays which energize between defined points and de-energize outside those points. The relays may also be programmed to perform auto-sequences and auxiliary functions such as pump-down operations, pump rotations to equalize wear, and de-sludge/cleaning. For further details, see “Other relay modes” on page 71.

Relay 5 is normally a Fail-safe Fault relay but may be re-allocated to another duty.

Section 4: Getting started

June 2014

How to start and use the Relay Wizard

Relays can be programmed easily using the Relay Wizard, accessible by navigating to the RELAY menu. The Relay Wizard also forms a part of the Application (App) Wizard.

Figure 4-27. Navigating to the RELAY Screen

SETUP

Run App? MONITOR

MAIN MENU

Controller: ****

Tx1: **** #1

SELECT INSTRUMENT

APPLICATION DISPLAY

OUTPUT

SETUP

CURRENT OUTPUT

RELAY

TOTALIZER

OUTPUT

Relay Wizard

Reset RL Params RELAY 1

RELAY

Section 4: Getting started

June 2014

Understanding the relay status icons on the display

The relay status icons on the Full PV Display have the following meanings:

= Relay is energized

0 = Relay is de-energized

A = Alarm relay (see page 91 about alarms)

S = Sampler relay

T = Totalizing relay

How to reset the relay parameters only to factory defaults

To reset all relay parameters to their factory defaults, do the following:

1. Navigate to: SETUP / [CONTROLLER /] OUTPUT / RELAY / Reset RL param

2. If you wish to proceed, press the red (ENTER) button once.

Reference Manual

IP2030/RM, Rev AA

(Otherwise, use the Esc button to exit to the RELAY menu).

3. Wait until the “Please wait…” message disappears.

4. Press the Esc button to exit to the RELAY menu.

Note

 Setting the relays to their factory default state in this way does NOT reset any other

parameters to their default state.

How to set-up an on/off point control relay

Note

 Relays are frozen while the MCU900 Series control unit is in Program mode, preventing

all relay operations apart from Totalizer and Sampler relays.

Relay outputs 1 to 4 can be programmed to be an On/Off Point control relay.

Menus: SETUP / [CONTROLLER /] OUTPUT / RELAY / RELAY 1, / RELAY 2, etc.

Relay 1 (RL1)

 When relay RL1 mode (P410) is Set Point:

relay RL1 is energized at P411 (on point) and de-energized at P412 (off point)

Relay 2 (RL2)

 When relay RL2 mode (P420) is Set Point:

relay RL2 is energized at P421 (on point) and de-energized at P422 (off point)

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Section 4: Getting started

June 2014

Relay 3 (RL3)

 If relay RL3 mode (P430) is Set Point:

relay RL3 is energized at P431 (on point) and de-energized at P432 (off point)

Relay 4 (RL4)

 If relay RL4 mode (P440) is Set Point:

relay RL4 is energized at P441 (on point) and de-energized at P442 (off point)

In a basic emptying application, the On Point (e.g. P411) is programmed to be greater than the Off Point (e.g. P412). The Set Point relay energizes when the control unit PV value (D800) exceeds the On Point and de-energizes when the PV value drops below the Off Point.

In a basic filling application, the On Point (e.g. P411) is programmed to be less than the Off point (e.g. P412). The Set Point relay energizes when the control unit PV value (D800) falls below the On point and de-energizes when the PV value rises above the Off Point.

There are set point relays modes for the control unit SV value (D801), TV value (D802) and FV value (D803). For details of these D80* parameters, see “Optional change: transmitter input

channel settings (advanced users)” on page 43.

Relay safeguard options

Menus: SETUP / [CONTROLLER /] OUTPUT / RELAY / RELAY 1, / RELAY 2, etc.

P413 RL1 Min On (Factory default: 0:00 m:s)

Defines the minimum time (minutes and seconds) that relay RL1 will stay energized before de-energising. This is an optional override (safeguard) to allow sufficient time for connected equipment to respond.

P414 RL1 Max On Factory default: 0:00 m:s)

Defines the maximum time (minutes and seconds) that relay RL1 will stay energized before de-energising. This is an optional override (safeguard) to prevent overuse of connected equipment.

P415 RL1 Min Off (Factory default: 0:00 m:s)

Defines the minimum time (minutes and seconds) that relay RL1 will stay de-energized before energising. This is an optional override (safeguard) to avoid overuse of connected equipment.

P423 to P425 are the equivalents for relay RL2.

P433 to P435 are the equivalents for relay RL3.

P443 to P445 are the equivalents for relay RL4.

Section 4: Getting started

P453 to P455 are the equivalents for relay RL5.

Other relay modes

Table 4-4 on page 72 is a list of all relay modes. Relay modes automatically enable and disable

special control functions, special alarms and pumped volume totalizing as shown in Table 4-5 on

page 73. Descriptions of relay modes and the auxiliary functions follow Ta bl e 4 - 5 .

Section 4: Getting started

June 2014

Table 4-4. Relay modes

Relay Mode Purpose of Relay Mode

None Relay is not used No Set point SV On/Off Point control using SV (D801)

Set point TV On/Off Point control using TV (D802)

Set point FV On/Off Point control using FV (D803)

Assist Duty Assist, On/Off Point Control and Auto Sequence

Stby com off Duty Standby, Common Off and Auto Sequence

Stdby split off Duty Standby, Split Off and Auto Sequence

Digital Input 1 Relay energizes while Digital Input 1 (IN1) is active. Yes Digital Input 2 Relay energizes while Digital Input 2 (IN2) is active. Yes Sampler Relay outputs sampler pulses

RoC Relay is energized if the rate of change of the control unit PV is out-of-limits

Digital input 1+2 Relay is energized while Digital Input 1 (IN1) and 2 (IN2) are both active Ye s Off Relay is always de-energized No Set Point On/Off Point Control using PV (D800)

Alarm Relay is allocated to alarm indication duty

Hi or Lo Alarm High alarm limit (using On/Off Point Control):

Totalizer Relay outputs totalizer pulses (MCU901 only)

Totalizer 1 Relay outputs totalizer 1 pulses (MCU902/MCU90F only)

Totalizer 2 Relay outputs totalizer 2 pulses (MCU902/MCU90F only)

Fau lt Indicate fault condition by de-energizing relay

Custom To set-up a custom relay operation, see “Custom mode relay” on page 86. No PV limits Relay energizes while control unit PV value (D800) is within on/off point limits.

On Relay is always energized No

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Auxiliary

functions

(Tab le 4- 5)

Yes

– see “How to set-up an on/off point control relay” on page 70.

Yes

– see “How to set-up an on/off point control relay” on page 70.

Yes

– see “How to set-up an on/off point control relay” on page 70.

Yes – see “Duty Assist relay with common off points” on page 74. – see “Duty Assist with split off points” on page 76. – see “Auto-sequence (Mobrey MCU901 and MCU902 only)” on page 84.

Yes – see “Standby, Common Off mode relay” on page 78 – see “Auto-sequence (Mobrey MCU901 and MCU902 only)” on page 84.

Yes – see “Standby, Split Off mode relay” on page 80. – see “Auto-sequence (Mobrey MCU901 and MCU902 only)” on page 84.

No – see “Sampler mode relay” on page 82.

Yes – see “Rate of Change mode relay” on page 83.

Yes – see “How to set-up an on/off point control relay” on page 70.

Yes – see “Set-up alarms” on page 91 for details of alarm handling.

Yes – The On Point must be greater than the Off Point. – Relay energizes when the PV (D800) is greater than the On Point. – Relay de-energizes when the PV (D800) is less than the Off Point. Low alarm limit (using On/Off Point Control): – The On Point must be less than the Off Point. – Relay energizes when the PV (D800) is less than the Off Point. – Relay de-energizes when the PV (D800) is greater than the On Point. An “A” is shown by the RL1 icon status (on the Full PV Display) when there is a high or low alarm. (The section “Set-up alarms” on page 91 is not applicable).

No – see “Totalizer mode relay” on page 82.

No – see “Fault mode relay” on page 82.

Yes – see “PV Limits mode relay” on page 83.

Section 4: Getting started72

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PUMPED

VOLUM E

PUMP

EFFICIENCY

LEVEL

RISING

ACTIVITY

TIME

RELAY RUN

Section 4: Getting started

June 2014

SPECIAL CONTROL FUNCTIONS SPECIAL ALARMS

OPS

RELAY

CUSTOM

(1)

PUMP

DOWN

(1)

SCUM LINE

SAVING

ENERGY

AUTO

(1)

SEQUENCE

SET POINTS

RELAY MODE

None

Table 4-5. Auxiliary functions valid for a given relay mode

Set point (PV) Yes Yes Yes Ye s Ye s Yes Ye s Yes

Section 4: Getting started

page 70 page 84 page 85 page 85 page 85 page 86 page 88 page 88 page 88 page 89 page 89 page 90

Set Point (SV) Yes Yes Ye s Yes Yes Ye s Ye s Ye s

Set Point (TV) Yes Yes Yes Yes Yes Ye s Yes Yes

Set Point (FV) Ye s Ye s Yes Ye s Yes Ye s Ye s Yes

Assist Yes Ye s Yes Ye s Ye s Yes Ye s Yes Ye s Ye s Ye s

Stby Com-off Ye s Ye s Ye s Ye s Yes Yes Ye s Yes Ye s Ye s Ye s

Stby Split-off Ye s Yes Ye s Ye s Yes Yes Ye s Yes Ye s Ye s Ye s

Digital Inputs Yes Yes Ye s

Sampler

Rate change Ye s Yes Yes Ye s

Off

Alarm Yes

Hi / Lo Alarm Yes

Tot al i zer

Fau lt

Custom

PV Limits Ye s Yes Yes Ye s

(1) Option available on the Mobrey MCU901 and MCU902 only.

Section 4: Getting started

5.0 m (P411)

8.0 m (P421)

2.0 m (P412 and P422)

Level in m

Pump 1

Pump 2

June 2014

Duty Assist relay with common off points

This function requires two or more Assist mode relays. Two or more of these relays can be energized at the same time (assisting), and they all de-energize at a common off point.

An Assist relay uses its On Point and Off Point parameters in a similar way to a Set Point mode relay. A typical application would be emptying a wet well / lift station.

The worked example here illustrates how the function works. To keep the example simple, the auto-sequencing options are not considered.

Example wet well / lift station application (emptying operation due to rising level) using assist mode relays and common off points

Consider an application with two relay outputs, RL1 and RL2, connected to individual pumps in a wet well/lift station. The control unit PV value (D800) is a level measurement in metres (m).

 In Figure 4-28, both Pump 1 and Pump 2 are off because the liquid level is at a

 When the level rises above 5 m (On point, P411), the relay RL1 is energized to start

 If the level continues to rise and is above 8 m (On point, P421), relay RL2 is energized to

Reference Manual

IP2030/RM, Rev AA

satisfactory level, below 5 m

Pump 1 (Figure 4-29)

start Pump 2 and assist Pump 1. Relay RL1 stays energized to keep Pump 1 pumping (Figure 4-30)

 Pump 1 and Pump 2 continue to pump down until the level falls to below 2 m (Off Point,

P412 and P422), at which relays RL1 and RL2 de-energize to switch off both pumps (Figure 4-31).

In this emptying application, the common off point is P412 (Off point, relay RL1) and

P422 (Off point, relay RL2), both of which are at the 2 m level.

Note

 If Pump 1 had kept the level below 8 m, it would stay switched on until the level is 2 m.

Safeguards to prevent over-use of a pump are in “Relay safeguard options” on page 71.

Figure 4-28. Both Pump 1 and Pump 2 are off (the level is okay)

Section 4: Getting started74

Reference Manual

5.0 m (P411)

8.0 m (P421)

2.0 m (P412)

Level in m

Pump 1

Pump 2

5.0 m (P411)

8.0 m (P421)

2.0 m (P412)

Level in m

Pump 1

Pump 2

5.0 m (P411)

8.0 m (P421)

2.0 m (P412)

Level in m

Pump 1

Pump 2

IP2030/RM, Rev AA

Section 4: Getting started

June 2014

Figure 4-29. Pump 1 is on (the rising level is above 5 m)

Figure 4-30. Pump 1 and Pump 2 are on (the rising level is above 8 m)

Section 4: Getting started

Figure 4-31. Pump 1 and Pump 2 are off (the falling level is below 2 m)

Section 4: Getting started

5.0 m (P411)

8.0 m (P421)

3.5 m (P422)

2.0 m (P412)

Level in m

Pump 1

Pump 2

June 2014

Duty Assist with split off points

This function requires two or more Assist mode relays. Two or more of these relays can be energized at the same time (assisting), and they all de-energize at a split off points.

An Assist relay uses its On Point and Off Point parameters in a similar way to a Set Point mode relay. A typical application would be emptying a wet well / lift station.

The worked example here illustrates how the function works. To keep the example simple, the auto-sequencing options are not considered.

Example wet well / lift station application (emptying operation due to rising level) using assist mode relays and split (separate) off points

Consider an application with two relays, RL1 and RL2, connected to individual pumps in a wet well. The control unit PV value (D800) is a liquid level measurement in metres.

 In Figure 4-32, both Pump 1 and Pump 2 are off because the liquid level is at a

 When the level exceeds 5 m (On Point, P411), relay RL1 is energized to start Pump 1

 When the level exceeds 8 m (On Point, P421), relay RL2 is energized to start Pump 2 and

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IP2030/RM, Rev AA

satisfactory level, below 5 m

(Figure 4-33)

assist Pump 1. Relay RL1 stays energized to keep Pump 1 pumping (Figure 4-34)

 When the level falls to below 3.5 m (Off point, P422), relay RL2 de-energizes to switch

off Pump 2 (Figure 4-35)

 When the level falls to below 2 m (Off point, P412), relay RL1 de-energizes to switch

off Pump 1

Note

 If Pump 1 keeps the level below 8 m, it would stay switched on until the level is 2 m.

Safeguards to prevent overuse of pumps are in “Relay safeguard options” on page 71

Figure 4-32. Both Pump 1 and Pump 2 are off (the level is okay)

Section 4: Getting started76

Reference Manual

5.0 m (P411)

8.0 m (P421)

3.5 m (P422)

2.0 m (P412)

Level in m

Pump 1

Pump 2

5.0 m (P411)

8.0 m (P421)

3.5 m (P422)

2.0 m (P412)

Level in m

Pump 1

Pump 2

5.0 m (P411)

8.0 m (P421)

3.5 m (P422)

2.0 m (P412)

Level in m

Pump 1

Pump 2

IP2030/RM, Rev AA

Section 4: Getting started

June 2014

Figure 4-33. Pump 1 is on (the rising level is above 5 m)

Figure 4-34. Both Pump 1 and Pump 2 are on (the rising level is above 8 m)

Section 4: Getting started

Figure 4-35. Pump 1 on and Pump 2 is off (the falling level is below 3.5 m)

Section 4: Getting started

5.0 m (P411)

8.0 m (P421)

2.0 m (P412 and P422)

Level in m

Pump 1

Pump 2

June 2014

Standby, Common Off mode relay

This function requires two or more Standby, Common Off mode relays. Only one of these relays is energized at any one time and the others are on standby to take over when needed.

A Standby, Common Off relay uses its On Point and Off Point parameters in a similar way to a Set Point mode relay. A typical application would be emptying a wet well / lift station.

The worked example here illustrates how the function works. To keep the example simple, the auto-sequencing options are not considered.

Example wet well application (emptying operation due to rising level) using standby, common off point relays

Consider an application with two relay outputs, RL1 and RL2, connected to individual pumps in a wet well. The control unit PV value (D800) is a liquid level measurement in metres (m).

 In Figure 4-36, both Pump 1 and Pump 2 are off because the liquid level is at a

 When the level rises above 5 m (On point, P411), the relay RL1 is energized to start

 If the level continues to rise and is above 8 m (On point, P421), the relay RL2 is

Reference Manual

IP2030/RM, Rev AA

satisfactory level, below 5 m

Pump 1 (Figure 4-37)

energized to start Pump 2. Relay RL1 is de-energized to switch off Pump 1 (Figure 4-38)

 Pump 2 continues to pump until the level falls below 2 m (Off Point, P412), at which

relay RL2 will de-energize to switch off Pump 2. (Pump 1 is already switched off).

In this emptying application, the common off point is P412 (Off point, relay RL1) and

P422 (Off point, relay RL2), both of which are at the 2 m level.

Note

 If Pump 1 had kept the level below 8 m, it would stay switched on until the level is 2 m.

Safeguards to prevent over-use of a pump are in “Relay safeguard options” on page 71.

Figure 4-36. Both Pump 1 and Pump 2 are off (the level is okay)

Section 4: Getting started78

Reference Manual

5.0 m (P411)

8.0 m (P421)

2.0 m (P412)

Level in m

Pump 1

Pump 2

5.0 m (P411)

8.0 m (P421)

2.0 m (P412)

Level in m

Pump 1

Pump 2

IP2030/RM, Rev AA

Section 4: Getting started

June 2014

Figure 4-37. Pump 1 is on (the rising level is above 5 m)

Figure 4-38. Pump 1 is off and Pump 2 is on (the rising level is above 8 m)

Section 4: Getting started

5.0 m (P411)

8.0 m (P421)

2.0 m (P412)

Level in m

Pump 1

Pump 2

June 2014

Standby, Split Off mode relay

This function requires two or more Standby, Split Off Point mode relays. Only one of these relays is energized at any one time and the others are on standby to take over when needed.

A Standby, Split Off Point relay uses its On Point and Off Point parameters, just like a Set Point mode relay. A typical application would be emptying a wet well / lift station.

The worked example here illustrates how the function works. To keep the example simple, the auto-sequencing options are not considered.

Example wet well / lift station application (emptying operation due to rising level) using standby, split off point relays

Consider an application with two relays, RL1 and RL2, connected to individual pumps in a wet well. The control unit PV value (D800) is a liquid level measurement in metres.

 In Figure 4-39, both Pump 1 and Pump 2 are off because the liquid level is at a

 When the level exceeds 5 m (On Point, P411), relay RL1 is energized to start Pump 1.

 When the level exceeds 8 m (On Point, P421), relay RL2 is energized to start Pump 2.

Reference Manual

IP2030/RM, Rev AA

satisfactory level, below 5 m

(Figure 4-40)

Relay RL1 is de-energized to switch off Pump 1 (Figure 4-41)

 When the level falls to below 5 m (Off point, P422), relay RL2 de-energizes to switch off

Pump 2. Relay RL1 is energized to switch on Pump 1 (Figure 4-42)

In this emptying application, the switch off point for Pump 2 is 5 m; the On Point for relay 1 P411 (On point, relay RL1) is used. P422 (Off point, relay RL2) is ignored.

 When the level falls below 2 m (Off point, P412), relay RL1 de-energizes to switch off

Pump 1

Note

 If Pump 1 keeps the level below 8 m, it would stay switched on until the level is 2 m.

Safeguards to prevent overuse of pumps are in “Relay safeguard options” on page 71

Figure 4-39. Both Pump 1 and Pump 2 are off (the level is okay)

Section 4: Getting started80

Reference Manual

5.0 m (P411)

8.0 m (P421)

2.0 m (P412)

Level in m

Pump 1

Pump 2

5.0 m (P411)

8.0 m (P421)

2.0 m (P412)

Level in m

Pump 1

Pump 2

5.0 m (P411)

8.0 m (P421)

2.0 m (P412)

Level in m

Pump 1

Pump 2

IP2030/RM, Rev AA

Section 4: Getting started

June 2014

Figure 4-40. Pump 1 is on (the rising level is above 5 m)

Figure 4-41. Pump 1 is off and Pump 2 is on (the rising level is above 8 m)

Section 4: Getting started

Figure 4-42. Pump 1 is on and Pump 2 is off (the falling level is below 5 m)

Section 4: Getting started

June 2014

Totalizer mode relay

Menu: SETUP / [CONTROLLER /] OUTPUT / TOTALIZER

A Totalizer relay can output a pulse for each time that the internal totalizer count (D828) increments. The duration of the pulse may set using parameter P534.

P534 Pulse Width (Factory default is 100)

 The duration controls both the 'On' time and the 'Off' time - i.e. the pulse width - and

Note

 If the totalizer count is running faster than the relay can produce pulses, an internal

Sampler mode relay

Sampler relays output pulses at a slower rate than a Totalizer relay. The Sampler relay can be used as a coarse totalizer or as a trigger to an external event.

Reference Manual

IP2030/RM, Rev AA

may be set to a value between 10 ms and 2.5 seconds in steps of 10ms.

accumulator stores the excess pulses. The stored excess pulses are output by the Totalizer relay after the totalizer count rate reduces.

Menu: SETUP / [CONTROLLER /] OUTPUT / TOTALIZER

P535 Sampler Factor (Factory default is 0)

 This is for defining the frequency of the Sampler pulse. For example, a value of 100

means that the Sampler relay outputs a single pulse for every 100

increment to the

Tot a lizer C ount (D828/D829)

 The pulse width is the same as selected for the Totalizer relay (P534)

Note

 For information on setting up the totalizer, see page 95 onwards.

Fault mode relay

Fault relays de-energize when a particular fault condition exists. Parameter D831 shows a list of active faults. Table 4-8 on page 94 has a summary of reporting methods for faults.

Menu: SETUP / [CONTROLLER /] OUTPUT / FAULT

P560 System Fault (Factory default is Both)

 Fault relay de-energizes while there is a control unit fault and the option is Both or Relay

P561 CU Temp Fault (Factor y default setting is None)

 Fault relay de-energizes while the CPU temperature rises above 65C and the option is

Both or Relay. Read-only parameter D844 shows the live temperature reading

P562 Xmtr Fault (Factory default setting is None)

 Fault relay de-energizes while a HART transmitter signals a fault and the option is

Both or Relay

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Section 4: Getting started

June 2014

P563 Digital Input (Factory default setting is None)

 Fault relay de-energizes while digital input IN1 or IN2 is triggered and the option is

Both or Relay

 See “Digital inputs IN1 and IN2” on page 63 for how to select the Fault action required

for this feature

Note

 Faults can be indicated using the output current if the Current or Both options are

selected (see “Set-up the current output” on page 68)

PV Limits mode relay

Menus: SETUP / [CONTROLLER /] OUTPUT / RELAY / RELAY 1, / RELAY 2, etc.

This relay mode uses the relay On Point and Off Points (e.g. P411 and P412) as high and low limit alarms for the control unit PV value (D800). The points can be in any order of value.

The relay is energized while the PV value exceeds the higher limit point value or while it is below the lower limit point value.

Rate of Change mode relay

Menus: SETUP / [CONTROLLER /] OUTPUT / RELAY / RELAY 1, / RELAY 2, etc. and MONITOR / [CONTROLLER /] READINGS / Rate of Change

A rate of change value for the control unit PV value (D800) is calculated every 5 seconds in units of PV per minute:

D809 = (PV

now

- PV

5 seconds ago

The On and Off points of a Rate of Change (RoC) mode relay are used as high and low limits for read-only parameter D809. Limit values are in units of PV per minute (PV/min) and can be in any order of value. The relay is energized while D809 exceeds the higher limit value or falls below the lower limit value.

Typically, where the PV value is a liquid level measurement, the RoC relay can be used to warn of a quickly rising or falling liquid level. Alternatively, the RoC mode relay can be used for controlling the rate of liquid flow.

For further uses of D809, see “Pump Efficiency alarm (Mobrey MCU901 and MCU902 only)” on

page 89 and “Pumped volume totalizing” on page 90.

) * 12

Section 4: Getting started

June 2014

Pump On Delay

Menu: SETUP / [CONTROLLER /] OUTPUT / RELAY / OVERRIDES

P499 Pump On Delay (Factory default is “3 s”)

 This function is to prevent pumps from all being switched on simultaneously, which

 When multiple relays are used for pump control (or as a set point) and power is lost,

Auto-sequence (Mobrey MCU901 and MCU902 only)

(Special Control Function – see Table 4-5 on page 73 for a full list)

Optional automatic rotation of the leading (most used) relay can be applied to Assist or Standby mode relays. To use these options, two or more relays must have the same mode. The lowest numbered relay is initially the lead relay.

Reference Manual

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could cause a massive surge

this function provides a delay of 0 up to 9 seconds (3 seconds by default) for the second, third, fourth, and fifth relay when power is re-established

Note

 The rotation of relays is performed without the actual swapping of values between

relay parameters.

P270 Auto Seq Enable (Factory default is “Off”)

 Select a rotation auto-sequence. All options are summarized in Tab l e 4 - 6

P271 Auto Seq Qual (Factory default is 0)

 This defines the threshold (e.g. how many starts) before applying an auto-sequence to

rotate the 'lead' to the next relay with the same mode

Table 4-6. Auto-sequence options

Option Rotation basis

Standby Star ts For Standby mode relays only - rotation is based on how many times the 'leading' relay has

been energized compared to parameter P271.

Stdby On Time For Standby mode relays only - rotation is based on the hours that the 'leading' relay has been

energized compared to parameter P271.

Stdby Ratio T

Stdby Ratio S

Assist Starts Rotation of 'leading' Assist mode relay is based on how many times it has been energized

Assist On Time Rotation of 'leading' Assist mode relay is based on the hours that it has been energized

Assist Ratio T

Assist Ratio S

Off No rotation required.

(1) Ratio is based on the first two lowest-numbered relays with the same mode.

(1)

For two Standby mode relays only - rotation is based on the ratio of ON time for two relays compared to P271.

(1)

For two Standby mode relays only - rotation based on the ratio of starts (times energized) compared to P271.

compared to P271.

(1)

For two Assist mode relays only - rotation based on the ratio of ON time for the two relays compared to P271.

(1)

For two Assist mode relays only - rotation based on the ratio of starts (times energized) compared to P271.

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Energy saving

(Special Control Function – see Table 4-5 on page 73)

Menu: SETUP / [CONTROLLER /] OUTPUT / RELAY / OVERRIDES

P275 Engy Save Strt (Factory default is 0:00 h:m)

 Set the time of day at which selected relays (P276) will energize until each relay Off

Point is reached. The energy saving start time is valid for one minute; if missed by the MCU900 Series control unit being in Program mode, no action is taken when subsequently put into Run App mode.

P276 Engy Save RL (Factory default is 00000)

 Select relays for the operation associated with parameter P275

 Each digit represents a relay. Relay RL1 is selected by editing the first digit to be a “1”.

Similarly, relay RL5 is selected with the fifth digit. To de-select a relay, change the appropriate digit back to a “0”

Scum line prevention (Mobrey MCU901 and MCU902 only)

(Special Control Function – see Table 4-5 on page 73 for a full list of auxiliary relay functions)

This special control function is normally used with a pump control application to provide a small variance in the start and stop level for the pump. It will help to prevent a build-up of scum on the side of a wet well or sump.

Menu: SETUP / [CONTROLLER /] OUTPUT / RELAY / OVERRIDES

P277 Scum line var (Factory default is 0.0)

 This parameter defines a maximum variance in the On Points and Off Points of selected

relays (P278). The variance is entered in the units of the On/Off Point, spaced in ten equal increments within the On Point and Off Point limits. Each time the selected relays (P278) de-energize, the variance moves on an increment

P278 Scum line RL (Factory default is 00000)

 Select relays for the operation associated with parameter P277

 Each digit represents a relay. Relay RL1 is selected by editing the first digit to be a “1”.

Similarly, relay RL5 is selected with the fifth digit. To de-select a relay, change the appropriate digit back to a “0”

Pump-down (Mobrey MCU901 and MCU902 only)

(Special Control Function – see Table 4-5 on page 73 for a full list)

Section 4: Getting started

In a pump-down application, the lowest relay Off Point ('pump off' level) is normally a fixed level above the Transmitter Bottom Reference point. However, it is sometimes required to make the pumps continue to run for a period past the Off Point or run down the level to the Transmitter Bottom Reference point. This can clear a sump of sludge that may have collected at the bottom.

Pump-down can be initiated automatically at pre-set intervals. A digital input can also initiate pump-down at any time and this will re-set the interval before the next pump-down.

Section 4: Getting started

June 2014

Pump-down automatically stops when the control unit PV (D800) is zero or after 20 minutes if a duration (P274) has not been programmed, whichever is the shorter period.

Note

 For details on configuring a digital input to initiate a pump-down operation,

Menu: SETUP / [CONTROLLER /] OUTPUT / RELAY / OVERRIDES

The relay mode must be Set point, Assist or, Standby, and parameters P272 to P274 edited to set-up the pump down operation.

P272 Pump down RL (Factory default is 00000)

 This is for selecting relays for a pump-down operation

 Each of the five digits represents a relay. Relay RL1 is selected by editing the first digit to

P273 Pump down Int (Factory default is 000:00 h:m)

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see “Digital inputs IN1 and IN2” on page 63

a “1”. Similarly, relay RL5 is selected by editing the fifth digit. To de-allocated, edit the appropriate digit back to a “0”

 This defines a fixed interval (hours and minutes) between pump-downs

P274 Pump down Dur (Default setting is 00:00)

 This defines the period (hours and minutes) that the relay will remain energized for the

pump-down. Safeguards may extend or reduce this period (see “Relay safeguard

options” on page 71)

D845 Next pump-down h:m (Factory default is 000:00)

 This shows the time remaining before the next pump-down is started. The display

shows 000:00 if a pump-down is in progress or if it is not set-up

Custom mode relay

(Special Control Function – see Table 4-5 on page 73 for a full list)

A custom mode relay is typically used together with a secondary external device to provide a voltage-free contact connected to one of the controller digital inputs (IN1 or IN2).

For example, this function may be used to provide a low flow cut-off for a pump control if the pump is provided with a flow/no-flow switch. A second relay contact assigned to pump control would then be wired in series with the Custom mode relay to provide the low flow cut-off.

Menu: SETUP / [CONTROLLER /] APPLICATION / CUSTOM

P250 Start On (Factory default is “None”)

 Relay energizes when the selected condition is true. See also Table 4-7 on page 87

P251 Stop On (Factory default is “None”)

 Relay de-energizes when the selected condition is true. See also Table 4-7 on page 87

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P252 Stop If (Factory default is “None”)

 Relay de-energizes when the selected condition is true. See also Table 4-7 on page 87.

P252 is a fail-safe for P251

P253 Start Time (Factory default is “7:00” - i.e. 7AM)

 This defines the clock time for when a Custom mode relay operation will begin

(if P250 = Time) or end (if P251 = Time)

P254 Interval (Factory default is “1:00” i.e. 1hr 0min)

 This is for defining the interval for repeating a Custom mode relay operation. P255 and

P256 are for setting up a second starting time and an associated interval

P257 Max Retries (Factory default is 10)

 This defines the maximum number of failed attempts to perform Custom mode relay

operations before it is deemed an alarm condition.

 The alarm condition can happen if the control unit is in Program mode, which prevents

all Custom mode relay operations from starting. Also, it can happen when the maximum time for an energized relay (relay safeguard, page 71) has been reached and is preventing a Custom mode relay operation from completing. For alarm indication options, see “Set-up alarms” on page 91

Table 4-7. P250/P251/P252 options

Start on

Options Purpose of option

None Switched off. Yes Ye s Ye s Time P253 and P254 determine when a Custom mode relay is to

be energized.

PV > Level Energize a Custom mode relay when the control unit PV

value (D800) is greater than the relay On Point.

PV < Level De-energize a Custom mode relay when the control unit PV

(1)(2)

Ext Trig

Ext Trig Xs

(1) This does not require Digital Input IN1 or IN2 to be allocated an ac tion (2) Abbreviations: "Ext Trig" = External Trigger (Digital Input)

value (D800) less than the relay On point. Energize a Custom mode relay when a digital input is active.

(1)(2)

When a Digital Input is active, de-energize a Custom mode relay after X seconds delay.

(P250)

Yes Ye s -

Yes - -

- Yes Ye s

Yes Ye s Ye s

- - Yes

Stop on

(P251)

Stop if (P252)

Note

 For any of the alarms below to be indicated by a relay or current output, an indication

method must be selected. See “Alarm indication selection” on page 91 for details

Section 4: Getting started

June 2014

Relay Operations alarm

(Special alarm – see Table 4-5 on page 73 for a full list of auxiliary relay functions)

Menu: SETUP / [CONTROLLER /] APPLICATION / ALARM

P491 RL operations (Factory default is 0)

 It is an alarm condition when the number of operations done by a selected relay (P492)

 Relay operation counters parameters D811 to D815 are in the MONITOR menu.

 For alarm indication options, see “Set-up alarms” on page 91

P492 RL ops rly sel (Factory default is "Disabled")

 Select the relay for the monitoring operation associated with parameter P491

Relay Run-time alarm

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is higher than the number in P491

See also “Health checking the MCU900 Series control unit” on page 110

(Special alarm – see Table 4-5 on page 73 for a full list of auxiliary relay functions)

Menu: SETUP / [CONTROLLER /] APPLICATION / ALARM

P493 RL runtime (Factory default is 0:00 h:m = OFF)

 It is an alarm condition when a relay, selected by P494, has been energized for longer

than the period (hours and minutes) set by P493

 Run-time counters parameters D821 to D825 are in the MONITOR menu.

See also “Health checking the MCU900 Series control unit” on page 110

 For alarm indication options, see “Set-up alarms” on page 91

P494 RL run rly sel (Factory default is "Disabled")

 Select the relay for the monitoring operation associated with parameter P493

Note

 For any of the alarms below to be indicated by a relay or current output, an indication

method must be selected. See “Alarm indication selection” on page 91 for details

No Activity alarm

(Special alarm - see Table 4-5 on page 73 for a full list of auxiliary relay functions)

Menu: SETUP / [CONTROLLER /] APPLICATION / ALARM

P497 No Activity Del (Factory default is 0:00 h:m)

 It is an alarm condition if there is no relay activity for the period (hours and minutes)

defined by parameter P497. Relays are selected for monitoring using parameter P498. The alarm condition is cleared when any of the monitored relays are energized

 For alarm indication options, see “Set-up alarms” on page 91

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P498 No Activity RL (Factory default is 00000)

 Select relays for the relay inactivity monitoring operation

 Each digit represents a relay. Relay RL1 is selected for monitoring by editing the first

digit to be a “1”. Similarly, relay RL5 is selected with the fifth digit. To de-select a relay, change the appropriate digit back to a “0”

Rising Level alarm

(Special alarm – see Table 4-5 on page 73 for a full list of auxiliary relay functions)

Menu: SETUP / [CONTROLLER /] APPLICATION / ALARM

P490 R Lev alrm del (Factory default is 0:00 m:s)

 The Rising Level alarm requires a minimum of one Assist or Standby mode relay.

If any Standby relay is energized, monitoring of the rising level is activated. For Assist relays, they must all be energized for monitoring of the rising level to be activated.

A timed delay (P490) starts after the monitoring is activated. If the level is still rising after the delay time has expired and the calculated rate of change of the control unit PV (D800) is positive, the result is a Rising Level alarm condition. The alarm condition stops as soon as the rate of change is negative, indicating a falling level.

 For the Rising Level alarm to be indicated by a relay output or the current output, a

method must be selected. See “Set-up alarms” on page 91

 See also “Rate of Change mode relay” on page 83

Pump Efficiency alarm (Mobrey MCU901 and MCU902 only)

(Special alarm – see Table 4-5 on page 73 for a full list of auxiliary relay functions)

The pump efficiency feature allows an alarm to be indicated (P550, P4*1) if the calculated pump efficiency falls below a defined limit (P495).

Menu: SETUP / [CONTROLLER /] APPLICATION / ALARM

P495 Pump effy limit (Factory default is 0% = OFF)

 It is an alarm condition while the calculated pump efficiency is below the limit defined

by P495. The pump efficiency calculation is based on the rate of change of the control unit PV (D800) and is independently monitored for each selected relay (P496)

 Pump efficiency values for relays are saved in D861 to D864, located in the MONITOR

menu. See also “Health checking the MCU900 Series control unit” on page 110.

P496 Pump effy RL (Factory default is 0000)

 Select relays for pump efficiency limit monitoring operation

 Each digit represents a relay. Relay RL1 is selected by editing the first digit to be a “1”.

Similarly, relay RL4 is selected with the fourth digit. (Relay RL5 does not support this feature.) To de-select a relay, change the appropriate digit to a “0”

Section 4: Getting started

Pump efficiency (PE) is calculated using the rate of change (RoC) of the control unit PV while a relay is energized. The PE value is saved in D86*; the “*” is the number of the relay (1 to 4)

Section 4: Getting started

June 2014

The calculation assumes that liquid continues to enter the well or tank at the rate just prior to the relay energizing (pump starting).

The control unit continuously calculates the rate of change, sampling a new control unit PV every 5 seconds (as described in Section “Rate of Change mode relay” on page 83).

Over the next 9 pump starts, a further 9 change of RoC values are stored such that the control unit can then calculate an average value in change of RoC. This average value, “RoC100” is then taken as being equivalent to the pump operating at 100% efficiency. A value of 100% is then stored in D86*.

Each subsequent pump start, and change in RoC thereafter, is used in a rolling average calculation for a new average value in change of RoC, RoCnew, which is then compared to the previous value “RoC100” and a new PE percentage value calculated using:

PE % = (RoCnew / RoC100) * 100

If the resulting PE is greater than 100%, the RoC100 is updated to the new value and the PE is re-stated as 100% based on this new value.

If the resulting PE is less than 100%, then the PE is calculated as above and stored in D86*

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If the PE is below the limit set (P495), the PE alarm condition is true. To indicate an alarm by Relay or Current Output, a method must be selected (see “Set-up alarms” on page 91).

Note

 The alarm condition is automatically cleared if the calculated PE rises above the limit

(P495) by 5% or more

Pumped volume totalizing

(Totalizer Option – see Table 4-5 on page 73 for a full list of auxiliary relay functions)

This function is for calculating the total throughput in a contents volume application.

The control unit monitors the change in volume when no pumps are running i.e. when any Assist or Standby mode relay is de-energized. It calculates the rate of change (RoC) of the control unit PV (D800) every five seconds and then converts it to a rate of change per minute for displaying as parameter D809.

When a pump is turned on, the control unit assumes that the rate of inflow remains the same as it was just before starting the pumps. The RoC value (D809) is frozen while the pumps are on i.e. when any Assist or Standby mode relay is energized.

To totalize pumped volume, the control unit PV (D800) must be in volume units so that the RoC value (D809) is in units of volume per minute. The control unit integrates this volume every second and increments the totalizer for every integer unit.

If the RoC value (D809) is 12 m

1.0 (m

), the Totalizer count (D828) increments every five seconds (1/12th of a minute).

per minute and the Total factor parameter (P530) is set to

Note

 The Totalizer Wizard can be used to set-up pumped volume totalizing.

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Menu: SETUP / [CONTROLLER /] OUTPUT / TOTALIZER

P530 Total factor (Factor default is 0.0)

 One count is added to the Totalizer count (D828) for a quantity defined by P530

P531 Total units (Factory default is "None")

 Pumped volume totalizing is enabled by the totalizer units (P531) being set to PVol.

(This parameter also defines the display units for parameter D828).

Note

 For other associated parameters, see “Set-up totalizing on the Mobrey MCU901 control

unit” on page 95.

4.5.22 Set-up alarms

Alarms

The MCU900 Series control unit can detect the following alarm conditions:

Section 4: Getting started

June 2014

 Control unit Primary / Process Value (PV) is out-of-limits

 Current Output saturated

(Standard:

 Logging memory filling (Mobrey MCU90F)

 Logging memory full (Mobrey MCU90F)

 Digital input is configured to force an alarm when active

 Maximum number of failed Custom relay operation attempts

 Current Input saturated

 Rising liquid level

 Relay operation count limit exceeded

 Relay run time limit exceeded

 Low pump efficiency (on the MCU901 and MCU902 only)

 Relay inactivity

 3.9mA or  20.8mA, NAMUR NE43:  3.8mA or  20.5mA)

Parameter D830 shows a list of active alarms. Alarms are indicated using relay outputs and the current output. Table 4-8 on page 94 has a summary of reporting methods for alarms.

Alarm indication selection

Menu: SETUP / [CONTROLLER /] OUTPUT / ALARM

Section 4: Getting started

For each alarm, there is a dedicated parameter in the ALARM menu for selecting the method of indication for that alarm. Options for parameters P540 to P551 are:

 None – if the alarm is to be indicated (default factory setting)

 Both – alarm is indicated by an Alarm mode relay and output current

 Current – alarm is indicated by the output current only

 Relay – alarm is indicated by an Alarm mode relay only

Section 4: Getting started

June 2014

For information on Alarm mode relays, see “Set-up the relays” on page 69.

Parameter P402 is used to decide how the output current indicates an alarm condition. See “Set-up the current output” on page 68 for alarm action options.

P540 PV Over Limits (Factory default is "None")

 Select the indication method for the alarm condition that happens while the control

P541 mA Out Sat (Factory default is "None")

 Select the indication method for the alarm condition that happens while the

P542 Log mem filling (Factory default is "None")

 Select the indication method for the alarm condition that happens while the available

P543 Digital Input (Factory default is “None”)

 Select the indication method for the alarm condition that happens while a digital input,

 See “Digital inputs IN1 and IN2” on page 63 for how to select the Alarm action required

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unit PV value is outside pre-set limits. See also “PV Limits mode relay” on page 83

output current is

 3.8 mA or 20.5 mA

logging memory is low. See also “P593 Low Mem Alarm (Default is 0%)” on page 64

configured with an action to force this alarm, is energized.

for this feature

P544 Max retries (Factory default is “None”)

 Select the indication method for the alarm condition that happens while a Custom relay

operation is unable to complete, even after a pre-set number of attempts (P257)

 See also “Custom mode relay” on page 86 for information

P545 mA In Sat (Factory default is "None")

 Select the indication method for the alarm condition that happens while the output

current is saturated i.e.

 3.7 mA or  20.75 mA

P547 Rising Level (Factory default is "None")

 Select the indication method for the Rising Level alarm condition

 See “Rising Level alarm” on page 89 for information

P548 RL Operations (Factory default is "None")

 Select the indication method for the alarm condition that happens while a relay

operation counter is higher than a pre-set limit

 See “Relay Operations alarm” on page 88 for information

P549 RL runtime (Factory default is "None")

 Select the indication method for the alarm condition that happens while a relay is

energized for longer than a pre-set period

 See “Relay Run-time alarm” on page 88 for information

Section 4: Getting started92

Emerson MCU900 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Section 1 Introduction

1.1 Safety messages

1.2 Manual overview

1.3 Control unit versions and software releases

1.4 Customer support

1.5 Product recycling/disposal

Section 2 Control Unit Overview

2.1 Safety messages

2.2 About the Mobrey MCU900 Series Control Unit

2.2.1 Wall and panel mounting options

2.2.2 4–20mA HART transmitter input options

2.2.3 Control functionality

2.3 Control unit functions

2.3.1 Standard functions

2.3.2 Difference, sum, and product functions (on MCU902 only)

2.4 Control unit front panel

2.4.1 Keypad

2.4.2 Status LED

2.4.3 Display

Section 3 Installation

3.1 Safety messages

3.2 Considerations before installation

3.2.1 Safety considerations

3.3 Mounting the control unit

3.3.1 Mounting the wall-mount version

3.3.2 Mounting the panel version

3.4 Electrical installation

3.4.1 Making electrical connections on wall-mount units

3.4.2 Making electrical connections on panel-mount units

3.4.3 Power connections

3.4.4 Earthing connections

3.4.5 Transmitter connections and cabling

3.4.6 Connecting HART transmitters to the Mobrey MCU902

3.4.7 Relay connections

3.4.8 Current output connections

3.4.9 Digital control voltage-free contact inputs

3.4.10 RS232 connections

Section 4 Getting started

4.1 Safety messages

4.2.1 Switching on with one new HART transmitter connected

4.2.2 Switching on with one 4–20 mA transmitter connected

4.3 Switching on the MCU902 for the first time

4.4 A quick tour of the menu system

4.5 Programming the control unit

4.5.1 The basics

4.5.2 Step-by-step programming of the control unit

4.5.3 Run App and Program operating modes

4.5.4 Application Wizard

4.5.5 Optional change: system settings

4.5.6 Optional change: transmitter input channel settings (advanced users)

4.5.7 Programming Input Channel 1 for a 4–20 mA input (advanced users)

4.5.8 Programming Channel 1 for a HART input (advanced users)

4.5.9 Programming Channel 2 for a HART input (MCU902 only) (advanced users)

4.5.10 Volumetric contents and flow measurement applications (advanced users)

4.5.11 Set-up the volumetric contents calculations for a popular linear / uniform vessel (advanced users)

4.5.12 Set-up the volumetric contents calculations for a popular non-linear / non-uniform shaped vessel (advanced users)

4.5.13 Set-up flow calculations for non-linear / non-uniform open channel profiles (advanced users)

4.5.14 Set-up open channel flow calculations for pre-programmed flat, parabolic, and Parshall flumes (advanced users)

4.5.15 Set-up Kindsvater Shen (V-notch ISO1438) flow calculations

4.5.16 Set-up exponential flow law calculations

4.5.17 Using a plotted profile for calculating volume or flow

4.5.18 Digital inputs IN1 and IN2

4.5.20 Set-up the current output

4.5.21 Set-up the relays

4.5.22 Set-up alarms