Partlow MIC 1400 Operator's Manual

MIC 1400

1/4 DIN MICROBASED CONTROLLER

OPERATORS
MANUAL

FORM 3665
EDITION 1
© OCT. 1995
PRICE $10.00

Brand

Information in this installation, wiring, and operation manual is subject to change
without notice. One manual is provided with each instrument at the time of ship­ment. Extra copies are available at the price published on the front cover.

Copyright © Oct. 1995, The Partlow Corporation, all rights reserved. No part of
this publication may be reproduced, transmitted, transcribed or stored in a retrieval
system, or translated into any language in any form by any means without the
written permission of the Partlow Corporation.

This is the First Edition of the MIC 1400 manual. It was written and produced
entirely on a desk-top-publishing system. Disk versions are available by written
request to the Partlow Publications Department.

We are glad you decided to open this manual. It is written so that you can take full
advantage of the features of your new MIC 1400 process controller.

NOTE:
It is strongly recommended that Partlow equipped
applications incorporate a high or low limit protective device
which will shut down the equipment at a preset process
condition in order to preclude possible damage to property
or products.

MIC 1400 Manual Edition 1

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Table of Contents

Section 1 - General Page

1.1 Product Description 5

Section 2 - Installation & Wiring

2.1 Installation & Wiring 7

2.2 Preparations for Wiring 9

2.3 Input Connections 14

2.4 Output Connections 16

Section 3 - Configuration & Operation

3.1 Operation 19

3.2 Configuration 24

3.3 Pre-Tune Mode 31

3.4 Auto-T une Mode 31

3.5 Manual T uning Method 32

Section 4 - Control Capability

4.1 Control Capability 34

4.2 Control Responses 34

4.3 Direct/Reverse Operation of Control Outputs 35

4.4 On-Off Control 35

4.5 Time Proportioning Control 36

4.6 Current Proportioning Control 37

4.7 Setpoint Adjustments 38

Appendices

A - Glossary of Terms 39

Figure A-1 Proportional Band & Deadband/Overlap 49

B - Board Layout - Jumper positioning 50

Figure B-1 PCB Positions 50
Figure B-2 Output 2/Output 3 Removal 51
Figure B-3 CPU PWA 52
Figure B-4 PSU PWA with Relay or SSR Out.1 53
Figure B-5 PSU PWA with DC Output 1 54
Figure B-6 Option PWA 55

(Continued on next page)

MIC 1400 ManualEdition 1 3

Appendices cont.

C - Hardware Definition Code 56
D - Input Range Codes 58
E - Specifications 60
F - Model Number Hardware Matrix 66
G - Software Reference Sheet 67

Figures & Tables

Figure 1-1 Controller Display Illustration 6
Figure 2-1 Panel Cut-Out Dimensions 7
Figure 2-2 Main Dimensions 8
Figure 2-3 Panel Mounting the controller 8
Figure 2-4 Noise Suppression 1 1
Figure 2-5 Noise Suppression 12
Figure 2-6 Wiring Label 13
Figure 2-7 AC Power 14
Figure 2-8 Thermocouple Input 14
Figure 2-9 RTD Input 14
Figure 2-10 Volt, mV mADC Input 15
Figure 2-11 Remote Digital Connections 15
Figure 2-12 Relay Output 1 16
Figure 2-13 SSR Driver Output 1 16
Figure 2-14 mADC Output 1 16
Figure 2-15 Relay Output 2 17
Figure 2-16 SSR Driver Output 2 17
Figure 2-17 mADC Output 2 17
Figure 2-18 Relay Output 3 18
Figure 2-19 SSR Driver Output 3 18
Figure 2-20 mADC Output 3 18

Figure 4-1 Proportional Bandwidth Effect on Output 37
Table 3-1 Enable Mode Configuration Procedures 24

Table 3-2 Program Mode Configuration Procedures 25
Table 3-3 Tune Mode Configuration Procedures 27

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Product Description 1.1

1.1.1 GENERAL

This instrument is a microprocessor based single loop controller capable of
measuring, displaying and controlling temperature, pressure, flow, and level
from a variety of inputs. Most outputs are easily tuned using the instrument
Pre-Tune and Auto-Tune functions.

Control functions, alarm settings and other parameters are easily entered
through the front keypad. E
data loss during AC power outages.

The input is user configurable to directly connect to either thermocouple,
RTD, mVDC, VDC or mADC inputs. The instrument can operate from a
90-264 VAC, 50/60 HZ power supply, or optional 24V AC/DC power supply.

1.1.2 DISPLAYS

Each instrument is provided with dual displays and status indicators as
shown in Figure 1-1. The upper display displays the value of the process
variable. The lower display displays the setpoint value. Status indication is
as shown, see Figure 1-1, page 6.

2

Technology (100 year life) protects against

1.1.3 CONTROL

The instrument can be programmed for on-off, time proportioning, or cur­rent proportioning control implementations depending on the model num­ber. A second control output is an available option. Proportional control
implementations are provided with fully programmable PID parameters.

1.1.4 ALARMS

Alarm indication is standard on all instruments. Up to two alarm outputs
are possible. Alarm type may be set as Process Direct or Reverse (high or
low), Deviation Direct or Reverse (above or below setpoint), Deviation
Band Type (closed or open within band), or Loop Reverse or Direct. Alarm
status is indicated by LED.

MIC 1400 ManualEdition 1 5

FIGURE 1-1

Keys and Indicators

AUTO

1.1.5 PROCESS VARIABLE/SETPOINT VALUE
RE-TRANSMISSION OUTPUT

If the instrument is specified with this option, this output may be scaled over
any desired range and re-transmitted.

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Installation and Wiring 2.1

Electrical code requirements and safety standards should be observed and
installation performed by qualified personnel.

The electronic components of the instrument may be removed from the
housing during installation. To remove the components, grip the side
edges of the front panel and pull the instrument forward. During re-installa­tion, the vertically mounted circuit boards should be properly aligned in the
housing.

Ensure that the instrument is correctly orientated. A stop will operate if an
attempt is made to insert the instrument incorrectly.

Recommended panel opening sizes are illustrated in Figure 2-1. After the
opening is properly cut, insert the instrument into the panel opening. En­sure that the panel gasket is not distorted and that the instrument is posi­tioned squarely against the panel. Slide the mounting clamp into place on
the instrument (see Figure 2-3, page 8) and push it forward until it is firmly
in contact with the rear face of the mounting panel.

Note: The mounting clamp tongues may engage either on the
sides or the top/bottom of the instrument housing. Therefore, when
installing several instruments side-by-side in one cut out, use the
ratchets on the top/bottom faces.

92 mm ± 0.8

FIGURE 2-1

Panel Cut-Out Dimensions

(3.62”± .031)

PANEL
CUTOUT

92 mm ± 0.8

(3.62”± .031)

SIZE

MIC 1400 ManualEdition 1 7

FIGURE 2-2

Main Dimensions

100 mm (3.94 in.)

96 mm
(3.78 in)

Side View

96 mm
(3.78 in.)

FIGURE 2-3

Panel Mounting the Controller

Mounting Clamp

10 mm (0.39 in.)

Controller Housing

Tongues on mounting clamp engage in
ratchet slots on controller housing

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Preparation for Wiring 2.2

2.2.1 WIRING GUIDELINES

Electrical noise is a phenomenon typical of industrial environments. The
following are guidelines that must be followed to minimize the effect of
noise upon any instrumentation.

2.2.1.1 INSTALLATION CONSIDERATIONS

Listed below are some of the common sources of electrical noise in the
industrial environment:

• Ignition Transformers

• Arc Welders

• Mechanical contact relay(s)

• Solenoids
Before using any instrument near the device listed, the instructions below

should be followed:

1. If the instrument is to be mounted in the same panel as any of the
listed devices, separate them by the largest distance possible. For
maximum electrical noise reduction, the noise generating devices
should be mounted in a separate enclosure.

2. If possible, eliminate mechanical contact relay(s) and replace with
solid state relays. If a mechanical relay being powered by an
instrument output device cannot be replaced, a solid state relay can
be used to isolate the instrument.

3. A separate isolation transformer to feed only instrumentation should
be considered. The transformer can isolate the instrument from noise
found on the AC power input.

4. If the instrument is being installed on existing equipment, the wiring in
the area should be checked to insure that good wiring practices have
been followed.

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2.2.1.2 AC POWER WIRING

Neutral (For 115 VAC)
It is good practice to assure that the AC neutral is at or near ground poten­tial. To verify this, a voltmeter check between neutral and ground should be
done. On the AC range, the reading should not be more than 50 millivolts.
If it is greater than this amount, the secondary of this AC transformer sup­plying the instrument should be checked by an electrician. A proper neutral
will help ensure maximum performance from the instrument.

2.2.1.3 WIRE ISOLATION

Four voltage levels of input and output wiring may be used with the unit:

• Analog input or output (i.e. thermocouple, RTD, VDC, mVDC, or mADC)

• SPDT Relays

• SSR driver outputs

• AC power

The only wires that should run together are those of the same category. If
they need to be run parallel with any of the other lines, maintain a minimum
6 inch space between the wires. If wires must cross each other, do so at
90 degrees. This will minimize the contact with each other and reduces
“cross talk”. “Cross Talk” is due to the EMF (Electro Magnetic Flux) emitted
by a wire as current passes through it. This EMF can be picked up by
other wires running in the same bundle or conduit.

In applications where a High Voltage Transformer is used (i.e. ignition sys­tems) the secondary of the transformer should be isolated from all other
cables.

This instrument has been designed to operate in noisy environments, how­ever, in some cases even with proper wiring it may be necessary to sup­press the noise at its source.

2.2.1.4 USE OF SHIELDED CABLE

Shielded cable helps eliminate electrical noise being induced on the wires.
All analog signals should be run with shielded cable. Connection lead
length should be kept as short as possible, keeping the wires protected by
the shielding. The shield should be grounded at one end only. The pre­ferred grounding location is the sensor, transmitter or transducer.

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2.2.1.5 NOISE SUPPRESSION AT THE SOURCE

Usually when good wiring practices are followed no further noise protection
is necessary. Sometimes in severe electrical environments, the amount of
noise is so great that it has to be suppressed at the source. Many manu­facturers of relays, contactors, etc. supply “surge suppressors” which
mount on the noise source.

For those devices that do not have surge suppressors supplied, RC (resis­tance-capacitance) networks and/or MOV (metal oxide varistors) may be
added.

Inductive Coils - MOV’s are recommended for transient suppression in
inductive coils connected in parallel and as close as possible to the coil.
See Figure 2-4. Additional protection may be provided by adding an RC
network across the MOV.

FIGURE 2-4

0.5
mfd
1000V

220

Coil

ohms

115V 1/4W
230V 1W

Contacts - Arcing may occur across contacts when the contact opens and
closes. This results in electrical noise as well as damage to the contacts.
Connecting a RC network properly sized can eliminate this arc.

For circuits up to 3 amps, a combination of a 47 ohm resistor and 0.1
microfarad capacitor (1000 volts) is recommended. For circuits from 3 to 5
amps, connect 2 of these in parallel. See Figure 2-5, page 12.

MIC 1400 ManualEdition 1 11

FIGURE 2-5

MOV

R C

Inductive
Coil

2.2.2 SENSOR PLACEMENT (Thermocouple or RTD)

Two wire RTD’s should be used only with lead lengths less than 10 feet.
If the temperature probe is to be subjected to corrosive or abrasive condi-

tions, it should be protected by the appropriate thermowell. The probe
should be positioned to reflect true process temperature:

In liquid media - the most agitated area
In air - the best circulated area

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FIGURE 2-6

Wiring Label

OUTPUT 3

Relay

+

INPUT

Linear (mA)

-

No external
connections
to be made
to these
terminals

-

­+

+

RTD

Linear (V/mV)

Thermocouple

N/C

SSR/DC

-

9
8
7
6
5
4
3

2
1

24

N/OC

+

11

1210

23 22

13
14
15
16

17
18
19

20
21

MAINS (LINE)
SUPPLY

24V 24V

L

AC DC

N

B

RS485

A

COM

-

+

SERIAL
COMMS.

N/C

C

SSR/DC

N/O

-

+

Relay

OUTPUT 1

+

SSR/DC

N/O

C

Relay

OUTPUT 2

-

N/C

MIC 1400 ManualEdition 1 13

Input Connections 2.3

In general, all wiring connections are made to the instrument after it is
installed. Avoid Electrical Shock. AC power wiring must not be connected
to the source distribution panel until all wiring connection procedures are
completed.

FIGURE 2-7

Main Supply
Connect the AC line voltage, hot and neutral, to terminals 13 and 14 re­spectively as illustrated below. Connect the positive to terminal 14 and
negative to terminal 13 for 24 V DC supply.

-

13

14

L

N

+

FIGURE 2-8

Thermocouple (T/C) Input
Make thermocouple connections as illustrated below. Connect the positive
leg of the thermocouple to terminal 2 and the negative leg to terminal 3.

-

+

Thermocouple

FIGURE 2-9

RTD Input
Make RTD connections as illustrated below . For a three wire RTD, connect
the resistive leg of the RTD to terminal 1 and the common legs to terminals
2 and 3. For a two wire RTD, connect one leg to terminal 2 and the other
leg to terminal 3 as shown below. A jumper wire supplied by the customer
must be installed between terminals 2 and 3. Input conditioning jumper
must be positioned correctly (see Appendix B) and Hardware Definition
Code must be correct (see Appendix C).

3

2

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3

2

RTD

1

FIGURE 2-10

V olt, mV Input
Make volt and millivolt connections as shown below . Terminal 2 is positive
and terminal 3 is negative. Input conditioning jumper must be positioned
correctly (see Appendix B) and Hardware Definition Code must be correct
(see Appendix C).

mADC Input
Make mADC connections as shown below. Terminal 4 is positive and ter­minal 1 is negative. Input conditioning jumper must be positioned correctly
(see Appendix B) and Hardware Definition Code must be correct (see Ap­pendix C).

+

-

+

Linear (mA)

-

Linear (V/mV)

FIGURE 2-11

Remote Digital Communications - RS485
Make digital communication connections as illustrated below .

4

3

2

1

16

17

B

A

18

COM

MIC 1400 ManualEdition 1 15

Output Connections 2.4

FIGURE 2-12

Relay Output 1
Connections are made to Output 1 relay as illustrated below. The contacts
are rated at 2 amp resistive, 120/240 V AC.

19

20

N/C

C

Relay

21

N/O

FIGURE 2-13

SSR Driver Output 1
Connections are made to Output 1 SSR Driver as illustrated below. The
solid state relay driver is a non-isolated 0-4 VDC nominal signal. Output
impedance is 250 ohms.

19

-

20

SSR

21

+

FIGURE 2-14

mADC Output 1
Make connections for DC Output 1 as illustrated below.

19

-

20

DC

21

MIC 1400 Manual Edition 1

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+

FIGURE 2-15

Relay Output 2
Connections are made to Output 2 relay as illustrated below. The contacts
are rated at 2 amp resistive, 120/240 V AC.

24 23 22

N/O

FIGURE 2-16

SSR Driver Output 2
Connections are made to Output 2 SSR Driver as illustrated below. The
solid state relay driver is a non-isolated 0-4 VDC nominal signal. Output
impedance is 250 ohms.

24 23 22

+

FIGURE 2-17

mADC Output 2
Make connections for DC Output 2 as illustrated below.

C

Relay

SSR

N/C

-

24 23 22

+

DC

-

MIC 1400 ManualEdition 1 17

FIGURE 2-18

Relay Output 3
Connections are made to Output 3 relay as illustrated below. The contacts
are rated at 2 amp resistive, 120/240 VAC.

Relay

N/OCN/C

10 11 12

FIGURE 2-19

SSR Driver Output 3
Connections are made to Output 3 SSR Driver as illustrated below. The
solid state relay driver is a non-isolated 0-4 VDC nominal signal. Output
impedance is 250 ohms.

SSR

-

10 11 12

FIGURE 2-20

mADC Output 3 (Recorder Output Only)
Make connections for DC output 3 as illustrated below.

DC

-

10 11 12

+

+

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Operation 3.1

3.1.1 POWER UP PROCEDURE

Verify all electrical connections have been properly made before applying
power to the instrument.

If the instrument is being powered for the first time, it may be desirable to
disconnect the controller output connections. The instrument will be into
control following the power up sequence and the output(s) may turn ON.
During power up, a self-test procedure is initiated during which all LED
segments in the two front panel displays appear and all LED indicators are
ON. When the self-test procedure is complete, the instrument reverts to
normal operation.

Note: A delay of about 3 seconds, when power is first applied, will be
seen before the displays light up.

3.1.2 KEYPAD OPERATION

AUTO/MANUAL KEY
This key is used to:

1. Enter the Auto/Manual mode and vice versa.

2. Used to activate the Auto Tune mode.

3. Used to confirm a change in the Program mode.
SCROLL KEY

This key is used to:

1. Select adjustment of the ramping setpoint, if enabled.

2. Select a parameter to be viewed or adjusted.

3. Display enabled modes of operation.

4. Display a mode parameter value.

5. Advance display from a parameter value to the next parameter code.

6. Activate the Pre-tune mode.

7. With the DOWN key to view the current Hardware Definition Code
setting.

MIC 1400 ManualEdition 1 19

UP KEY
This key is used to:

1. Increase the displayed parameter value.

2. Increase setpoint.

3. With the DOWN key to enter Pre and Auto Tune mode.

DOWN KEY
This key is used to:

1. Decrease the displayed parameter value.

2. Decrease setpoint.

3. With the UP key to enter the Pre and Auto Tune mode.

4. With the SCROLL key to view the current Hardware Definition Code
setting.

3.1.3 DISPLAYS

During configuration the upper display shows the parameter setting. The
lower display shows the parameter code for the currently selected param­eter. During operation, the upper display shows the value of the process
variable. The lower display shows the setpoint value.

3.1.3.1 ALARM STATUS DISPLAY*

The user may view the status of the instrument's alarm(s) by depressing
the SCROLL key until the lower display shows the legend "ALSt" and the
upper display shows the alarm status in the following format:

Loop Alarm Status
L = Energized
Blank = De-energized

Alarm 1 Status
1 = Energized
Blank = De-energized

Alarm 2 Status
2 = Energized
Blank = De-energized

*This display is available only if one or more of the alarms is/are energized.
When "ALSt" is seen in the lower display, to enter the Program or T une

modes, press the UP key with "ALSt" displayed, then the SCROLL key to
Program or T une.

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3.1.3.2 OVER-RANGE/UNDER-RANGE DISPLA Y

If the process variable attains a value higher than the input scale maximum
limit, the upper display will show:

If the process variable attains a value lower than the input scale minimum,
the upper display will show:

If a break is detected in the sensor circuit, the upper display will show:

3.1.4 FRONT PANEL INDICATORS

OP1 Indicates the state of the Output 1 relay or SSR driver. When the

indicator is ON the relay is energized or the SSR driver is ON.

OP2 Indicates the state of the Output 2 relay or SSR driver. When the

indicator is ON the relay is energized or the SSR driver is ON.

ALM When flashing, indicates an Alarm condition.
MAN Flashes when the Manual mode has been entered
AT Indicates when the Pre-Tune mode or Auto-Tune mode has been

selected; flashing for Pre-Tune and continuously ON for Auto-Tune.

3.1.5 SETPOINT ADJUSTMENT

3.1.5.1 LOCAL SETPOINT

To adjust the instrument setpoint, proceed as follows:

MIC 1400 ManualEdition 1 21

To adjust the Setpoint, press the UP or DOWN key as applicable.
Momentary depression will increment or decrement (as appropriate) the
setpoint by one unit in the least significant digit. If the key is held for longer
than 1 second, the least significant digit will change at the rate of 25 units
per second. If the key is held for longer than 10 seconds, the second least
significant digit will change at the rate of 25 units per second. If the key is
held for more than 10 seconds, the third least significant digit will change at
the rate of 25 units per second.

3.1.5.2 RAMPING SETPOINT

A selectable Ramp Rate function in the range of 1 to 9999 units per hour
can be used to limit the rate at which the setpoint used by the control algo­rithm will change. This feature will also establish a soft start up. Upon
power up, the instrument will take the initial process value as the setpoint.
A setpoint ramp rate will be calculated to increase the setpoint from the
initial process value to the setpoint selected. The setpoint ramp feature
disables the Pre-Tune facility. The Auto-Tune facility, if selected, will com­mence only after the setpoint has completed the ramp.

Sudden changes in the setpoint value entered via the keypad can be inhib­ited from effecting the control outputs by use of this feature. The internal
setpoint used to control the process will ramp to the setpoint value entered
at the rate of change selected.

To view the Ramping Setpoint value while in the Control mode and "ESPr"
in the Tune mode is disabled, press the SCROLL key until "SPrP" is dis­played in the lower display. This is the code for the ramping setpoint value.
Press the SCROLL key one more time and the lower display shows "SPrP"
and the upper display will show the current ramping setpoint.

SPRr not OFF and ESPr equal to 0

PV BLANK Ramping SP PV
*SP SPrP SPrP *SP

If ESPr is enabled, the display sequence changes to:

PV BLANK Ramping SP BLANK *Ramp Rate PV
*SP SPrP SPrP SPrr SPrr *SP

*Adjustable

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