YSI MIQ-A-MOD User Manual
IQ SENSOR NET
MIQ/(A-)MOD
Operating Manual
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Modbus RTU and RS 485 connection
for the IQ S
ENSOR NET system2020 XT USB
MIQ/(A-)MOD
Note
For the most recent version of the manual, please visit www.ysi.com
.
Contact YSI
1725 Brannum Lane
Yellow Springs, OH 45387 USA
Tel: +1 937-767-7241
800-765-4974
Email: environmental@ysi.com
Internet: www.ysi.com
Copyright © 2012 Xylem Inc.
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MIQ/(A-)MOD Contents
Modbus RTU und RS 485 connection for
the IQ S
ENSOR NET system 2020 XT USB
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 How to use this component operating manual . . . . . . . . . 5
1.2 Modbus and IQ S
ENSOR NET system 2020 XT USB . . . . 6
2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Interface for the Modbus RTU . . . . . . . . . . . . . . . . . . . . . 9
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 The Modbus module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2.1 Terminal connections . . . . . . . . . . . . . . . . . . . . 11
3.2.2 Connecting the Modbus cable . . . . . . . . . . . . . . 12
3.2.3 Setting/changing the address, baud rate and parity
16
3.2.4 Bus and module monitoring . . . . . . . . . . . . . . . 18
3.3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4 Modbus checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.5 Sensor administration under Modbus . . . . . . . . . . . . . . 22
3.5.1 Creating the assignment of sensor numbers . . 22
3.5.2 Creating the identical assignment of sensor
numbers in several systems . . . . . . . . . . . . . . . 22
3.5.3 Changing the assignment of sensor numbers . . 23
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4 Data transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.2 Modbus query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.3 Structure of the information . . . . . . . . . . . . . . . . . . . . . . 29
4.4 Sensor data block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.5 Data formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5 What to do if ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.1 Fault diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.2 Error elimination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.1 IQ SENSOR NET Component MIQ/(A-)MOD . . . . . . . . . . 37
6.2 Modbus module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
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Contents MIQ/(A-)MOD
7.1 Ordering & Technical Support . . . . . . . . . . . . . . . . . . . . 39
7.2 Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
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MIQ/(A-)MOD Overview
IQ Sensor Net Operating Manual
System
Operating
Manual
(Ring Binder)
IQ Sensor
Operating
Manual
MIQ Module
Operating
Manual
MIQ Terminal
Operating
Manual
Component Operating Manuals
1Overview
1.1 How to use this component operating manual
The present operating manual complements the system operating
Structure of the
ENSOR NET
IQ S
operating manual
manual for the IQ S
description of the MIQ/(A-)MOD module.
File this operating manual directly behind the system operating manual.
ENSOR NET system 2020 XT USB. Is contains the
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Fig. 1-1 Structure of the IQ SENSOR NET operating manual
The IQ SENSOR NET operating manual has a modular structure like the
ENSOR NET system itself. It consists of the system operating
IQ S
manual and the operating manuals of all the components used.
The space in the ring binder behind the system operating manual is
intended for filing the component operating manuals. Please file all
component operating manuals here so that all information is quickly
available in one location.
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Overview MIQ/(A-)MOD
1.2 Modbus and IQ SENSOR NET system 2020 XT USB
System communication The functional units of the IQ SENSOR NET are connected with one
another via a common line (Fig. 1-2). The line consists of two wires and
a shield. It transports digital information between the controller and the
other modules. At the same time, the line is used to supply all modules
with electrical voltage from a power supply unit. The power supply unit
is only required for power supply and is not used in the system
communication.
With the -MOD option, the MIQ/(A-)MOD module upgrades the system
communication by a Modbus interface. Via this interface, sensor data
can be queried with the Modbus RTU protocol. The Modbus interface
(RS 485) also enables a direct point-to-point connection from an
IQ S
ENSOR NET system to a Modbus master (e.g. PC or PLC).
Fig. 1-2 Functional units of the IQ SENSOR NET with connection to the Modbus
Note
All other general information on components, functions and operation
of the IQ S
ENSOR NET system 2020 XT USB is given in the system
operating manual.
With the A option, the MIQ/(A-)MOD module extends the
ENSOR NET system by a fully automatic air pressure compensation
IQ S
for D.O. sensors (see system operating manual).
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MIQ/(A-)MOD Safety instructions
2 Safety instructions
This component operating manual contains special instructions that
must be followed during the installation of the Modbus module. Thus, it
is essential to read this component operating manual before carrying
out any work using this sensor. In addition to this manual, the S
chapter of the IQ S
ENSOR NET system operating manual must be
followed.
Always keep this component operating manual together with the
system operating manual and all other component operating manuals
in the vicinity of the IQ S
ENSOR NET system.
Directions The following symbols indicate special features in the individual
chapters of this operating manual:
Note
indicates notes that draw your attention to special features.
AFETY
Note
indicates cross-references to other documents, e.g. operating
manuals.
2.1 Authorized use
Authorized use of the MIQ/(A-)MOD consists of its use as an interface
to a Modbus.
The technical specifications according to chapter 5 W
must be observed. Only operation according to the instructions in this
operating manual is authorized.
Any other use is considered to be unauthorized. Unauthorized use
invalidates any claims with regard to the guarantee.
HAT TO DO IF ...
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Safety instructions MIQ/(A-)MOD
2.2 General safety instructions
The MIQ/(A-)MOD is constructed and inspected in accordance with the
relevant guidelines and norms for electronic instruments (see chapter
5W
HAT TO DO IF ...).
It left the factory in a safe and secure technical condition.
Function and
operational safety
The failure-free function and operational safety of the MIQ/(A-)MOD is
only guaranteed if the generally applicable safety measures and the
special safety instructions in this operating manual are followed during
its use.
The failure-free function and operational safety of the MIQ/(A-)MOD is
only guaranteed under the environmental conditions that are specified
in chapter 5 WHAT TO DO IF ....
Safe operation If safe operation is no longer possible, the MIQ/(A-)MOD must be taken
out of operation and secured against inadvertent operation.
Safe operation is no longer possible if the MIQ/(A-)MOD:
has been damaged in transport
has been stored under adverse conditions for a lengthy period of
time
is visibly damaged
no longer operates as described in this manual.
If you are in any doubt, contact the supplier of your MIQ/(A-)MOD.
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MIQ/(A-)MOD Interface for the Modbus RTU
3 Interface for the Modbus RTU
The MIQ/(A-)MOD Modbus module enables to connect the
ENSOR NET system 2020 XT USB with all the sensors connected to
IQ S
it to the digital connection of a superordinate process control.
In the MIQ/(A-)MOD, the AnyBus-S Modbus RTU Modbus module of
the HMS INDUSTRIAL NETWORKS AB company is mounted for this.
Note
Further instructions for the installation and operation of a Modbus
network are given on the Internet under www.Modbus.org. Especially
recommendable is the "Aufbaurichtlinie PROFIBUS/FMS" (installation
guideline) issued by the PNO PROFIBUS user organization, (PNO
order number 2.111) with many practical installation tips that apply to
Modbus systems as well.
3.1 Scope of delivery
The scope of delivery of the MIQ/(A-)MOD module comprises:
MIQ/MOD or MIQ/A-MOD
Modbus module, AnyBus-S Modbus RTU,
mounted in the MIQ/(A-)MOD module
4 x screwed cable glands with seals and blind plugs
2 x ISO blind nuts (M4)
2 x cheese-head screws (M4x16) with plastic washer
1 x contact base
2 x plastic tapping screws for fixing the contact base
Screw for shielding terminal
2 x washer for shielding terminal
Insulating part of the shielding terminal
Operating manual.
3.2 The Modbus module
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The Modbus module (AnyBus-S Modbus RTU) is mounted on the main
PCB of the MIQ/(A-)MOD module.
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Interface for the Modbus RTU MIQ/(A-)MOD
AnyBus-S
Modbus RTU
2
4
ON
OFF
1
5
3
2
ON
OFF
Fig. 3-1 AnyBus-S Modbus RTU in the MIQ/MC(-A)-MOD
The AnyBus-S Modbus RTU is an interface that can be used to query
sensor data with the Modbus RTU protocol.
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Fig. 3-2 Elements of the AnyBus-S Modbus RTU
1 Modbus RTU terminal strip
2 Modbus terminator switch
3 Dip switches to set the address, baud rate and
parity (see section 3.2.3)
4 LEDs for Modbus diagnosis
5 LED for module diagnosis
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MIQ/(A-)MOD Interface for the Modbus RTU
1
6
2
3
4
5
3.2.1 Terminal connections
Fig. 3-3 Terminal connections
Pin Name Function
1 --
2 --
3 A line Negative RxD/TxD according to RS 485
specification
4 B line Positive RxD/TxD according to RS 485
specification
5 --
6 Shield BUS cable screen, connected with PE
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Interface for the Modbus RTU MIQ/(A-)MOD
(A)
(B)
(A)
instrument connected
at the Modbus,
e.g. MIQ/(A-)MOD
Modbus cable
3.2.2 Connecting the Modbus cable
The MIQ/(A-)MOD component can be connected at the Modbus end
(A) or with a loop-through (B).
An RS 485 point-to-point connection has to be installed as a
component at the end of the Modbus (A).
Fig. 3-4 Connection options of the MIQ/(A-)MOD at the Modbus cable,
(A) at the end or (B) with loop-through
Note
All cables with electrical characteristics according to EN 50170 are
suitable as a Modbus cable (e.g. all Profibus cables).
(A)
Connecting the
MIQ/(A-)MOD
component
at the Modbus end
1 Carefully strip the Modbus cable insulation for approx. 20 mm.
2 Bare the Modbus wires from the shielding braid and strip them
for approx. 5 mm.
3 Twist the shielding braid and cover it with approx. 15 mm
insulating tube.
4 Insert the Modbus cable into the module housing of the MIQ/
MC(-A)-MOD through the screwed cable gland.
5 Additionally insulate the transition between cable sheath and
insulating tube of the shielding braid (e.g. with insulating tape
or shrinkable tubing), so that no shielding braid is uncovered.
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Fig. 3-5 Modbus cable with insulating tape
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MIQ/(A-)MOD Interface for the Modbus RTU
AnyBus-S
Modbus RTU
6 Connect the Modbus wires and shield to the terminal
connections of the Modbus module (connections ALine, BLine
and Shield, see section 3.2.1).
Fig. 3-6 Connection of the MIQ/(A-)MOD as a Modbus end device
7 Fasten the cap nut of the screwed cable gland.
8 Check and if necessary correct the position of the Modbus
terminator switch.
The switch must be in the ON position.
9 Perform the check:
Check whether the wires and cables are screwed on tightly.
Insulate open wires.
Remove any cable remains from the MIQ/(A-)MOD module.
10 Close the MIQ/(A-)MOD module.
Note
Using a shielding terminal, connect the shield of the Modbus cable to
the potential equalization or grounding system of the plant in the vicinity
but outside of the MIQ module housing.
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