Honeywell 2MLF-RD4A User manual

Honeywell Process Solutions
Resistance Temperature Detector
2MLF-RD4A
User's Guide
ML200-RTD
R200
September 2010
Release 200
Honeywell

ii Resistance Temperature Detector 2MLF-RD4A User's Guide R200
Honeywell September 2010
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Release 200 September 2010
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R200 Resistance Temperature Detector 2MLF-RD4A User's Guide iii
September 2010 Honeywell
About This Document
This document describes the specifications, handling, and programming methods for
2MLF-RD4A type Resistance Temperature Detector (RTD) module used in association
with CPU module of MasterLogic-200 PLC series (here after referred to as 2MLF-
RD4A).
Release Information
Document Name Document
ID
Release
Number
Publication
Date
2MLF-RD4A User's Guide - ML200 ML200-
RTD
200 September
2010
References
The following list identifies all documents that may be source of reference for material discussed
in this publication.
Document Title
SoftMaster User’s Gudie

Support and Other Contacts
iv Resistance Temperature Detector 2MLF-RD4A User's Guide R200
Honeywell September 2010
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R200 Resistance Temperature Detector 2MLF-RD4A User's Guide v
September 2010 Honeywell
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vi Resistance Temperature Detector 2MLF-RD4A User's Guide R200
Honeywell September 2010
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Symbol Definitions
R200 Resistance Temperature Detector 2MLF-RD4A User's Guide vii
September 2010 Honeywell
Symbol Definitions
The following table lists the symbols used in this document to denote certain conditions.
Symbol Definition
ATTENTION: Identifies information that requires special
consideration.
TIP: Identifies advice or hints for the user, often in terms of
performing a task.
REFERENCE -EXTERNAL: Identifies an additional source of
information outside of the bookset.
REFERENCE - INTERNAL: Identifies an additional source of
information within the bookset.
CAUTION
Indicates a situation which, if not avoided, may result in equipment
or work (data) on the system being damaged or lost, or may result in
the inability to properly operate the process.
CAUTION: Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury. It may also be used
to alert against unsafe practices.
CAUTION symbol on the equipment refers the user to the product
manual for additional information. The symbol appears next to
required information in the manual.
WARNING: Indicates a potentially hazardous situation, which, if not
avoided, could result in serious injury or death.
WARNING symbol on the equipment refers the user to the product
manual for additional information. The symbol appears next to
required information in the manual.

Symbol Definitions
viii Resistance Temperature Detector 2MLF-RD4A User's Guide R200
Honeywell September 2010
Symbol Definition
WARNING, Risk of electrical shock: Potential shock hazard where
HAZARDOUS LIVE voltages greater than 30 Vrms, 42.4 Vpeak, or
60 VDC may be accessible.
ESD HAZARD: Danger of an electro-static discharge to which
equipment may be sensitive. Observe precautions for handling
electrostatically sensitive devices.
Protective Earth (PE) terminal: Provided for connection of the
protective earth (green or green/yellow) supply system conductor.
Functional earth terminal: Used for non-safety purposes such as
noise immunity improvement.
NOTE: This connection shall be bonded to Protective Earth at the
source of supply in accordance with national local electrical code
requirements.
Earth Ground: Functional earth connection.
NOTE: This connection shall be bonded to Protective Earth at the
source of supply in accordance with national and local electrical
code requirements.
Chassis Ground: Identifies a connection to the chassis or frame of
the equipment shall be bonded to Protective Earth at the source of
supply in accordance with national and local electrical code
requirements.

R200 Resistance Temperature Detector 2MLF-RD4A User's Guide ix
September 2010 Honeywell
Contents
1. INTRODUCTION ..........................................................................17
1.1 Introduction to Resistance Temperature Detector .................................... 17
1.2 Features ......................................................................................................... 17
1.3 Terminology................................................................................................... 19
Analog value – A ..................................................................................................................19
Digital value - D....................................................................................................................19
Platinum resistance temperature detector (RTD) .................................................................20
2. SPECIFICATIONS........................................................................21
2.1 Performance specifications ......................................................................... 21
2.2 Part names and functions ............................................................................ 23
2.3 RTD input module characteristics............................................................... 25
Temperature conversion ......................................................................................................25
Conversion speed ................................................................................................................26
Accuracy ..............................................................................................................................26
Temperature display ............................................................................................................27
Scaling function....................................................................................................................28
Disconnection detecting function..........................................................................................29
Sensor connection ...............................................................................................................30
2.4 RTD module functions.................................................................................. 34
Averaging function ...............................................................................................................34
Filtering function...................................................................................................................36
Alarm function ......................................................................................................................37
Maximum/minimum display function ....................................................................................40
3. INSTALLATION AND WIRING ....................................................41
3.1 Installation ..................................................................................................... 41
Installation environment .......................................................................................................41
Handling precautions ...........................................................................................................41
3.2 Wiring ............................................................................................................. 42
Wiring precautions ...............................................................................................................42
Wiring examples...................................................................................................................42

Contents
Symbol Definitions
x Resistance Temperature Detector 2MLF-RD4A User's Guide R200
Honeywell September 2010
4. OPERATION SETTING AND MONITORING .............................. 45
4.1 Operation procedure .....................................................................................45
4.2 Operation parameters setting ......................................................................46
Setting items........................................................................................................................ 46
How to use I/O parameters? ............................................................................................... 48
4.3 Functions of Special Module Monitoring ....................................................56
4.4 Precautions ....................................................................................................57
4.5 Special Module Monitoring...........................................................................58
Running Special Module Monitoring.................................................................................... 58
How to use Special Module Monitoring? ............................................................................. 58
4.6 Automatic registration of Special Module Variables .................................64
Automatic registration of special module variables.............................................................. 64
Save variables..................................................................................................................... 65
View variables in the program ............................................................................................. 66
5. INTERNAL MEMORY CONFIGURATION AND FUNCTIONS .... 69
5.1 Internal memory configuration.....................................................................69
Input/output area of conversion data (%U Address)............................................................ 69
Operation parameter setting area (PUT/PUTP)................................................................... 76
Other data monitoring area (GET/GETP) ............................................................................ 79
5.2 Internal memory functions............................................................................82
Read module READY/ERROR flags (internal memory address %UXa.b.14~15) ............... 82
Run channel flag (internal memory address %UXa.b.16~27).............................................. 82
Process alarm flag (internal memory address: %UXa.b.32~47).......................................... 83
Rate of change alarm flag (internal memory address %UXa.b.48~61) ............................... 83
Temperature value (internal memory address %UWa.b.4 ~7) ............................................ 84
Scaled temperature output value (internal memory address %UWa.b.8~11)...................... 85
Temp maximum/minimum value (internal memory address %UWa.b.12 ~19).................... 85
Data upload time (internal memory address %UDa.b.10~13) ............................................. 86
Alarm (PVA/RCA) enable/disable (internal memory address %UXa.b.464~471) ................ 86
5.3 Operation parameters setting area ..............................................................88
Channel enable/disable (address No.0) .............................................................................. 88
Sensor type setting (addresses 1–4)................................................................................... 89
Temperature conversion unit (address 5)............................................................................ 90
Filter value (addresses 6 – 9) .............................................................................................. 92
Averaging method setting (addresses 10–13)..................................................................... 93
Average value setting (addresses 14–17) ........................................................................... 94
Scaling type (address 18).................................................................................................... 96
Scaling range (addresses 19–26)........................................................................................ 98
Process alarm limit setting (addresses 27–42).................................................................... 99

Contents
Symbol Definitions
R200 Resistance Temperature Detector 2MLF-RD4A User's Guide xi
September 2010 Honeywell
Process alarm hysteresis setting (addresses 43–46).........................................................101
Input variation alarm type (address 47)..............................................................................102
Input variation alarm upper/lower limit value (addresses 48–55) .......................................104
Detection cycle of input variation alarm (addresses 56–59) ...............................................106
Setting error information (addresses 60–63) ......................................................................107
Input variation value/rate output (addresses 64–67) ..........................................................108
Sensor disconnection information (addresses 68–71) .......................................................111
6. PROGRAMMING........................................................................113
6.1 Read/write operation of operation parameters setting area................... 113
Read data from the operation parameters setting area (GET, GETP instruction) ..............113
Difference between GET instruction and GETP instruction................................................113
Write data to the operation parameters setting area (PUT, PUTP instruction) ...................114
Difference between PUT instruction and PUTP instruction ................................................114
6.2 Basic program ............................................................................................. 116
6.3 Application program ................................................................................... 119
Monitoring program of °C temperature-converted and scaled value (‘assign fixed points to I/O
slot (64)’ option used).........................................................................................................119
Program with °F temperature-converted value and highest/lowest process alarm (I/O slot
fixed-points assigned: based on changeable type) ............................................................123
7. TROUBLESHOOTING ...............................................................129
7.1 Introduction ................................................................................................. 129
7.2 Error codes .................................................................................................. 129
7.3 Troubleshooting procedures ..................................................................... 131
RUN LED flickering ............................................................................................................131
RUN LED OFF ...................................................................................................................132
CPU cannot read temperature conversion value................................................................133
RTD input value is not consistent with the detected value .................................................134
RTD module hardware error...............................................................................................135
RTD module status check through SoftMaster system monitoring.....................................135
Execution sequence...........................................................................................................135
Module information.............................................................................................................135
8. APPENDIX .................................................................................137
8.1 Appendix 1: Standard resistance values of Pt100/JPt100 sensors ....... 137
8.2 Appendix 2: Dimensions ............................................................................ 139
2MLF-RD4A .......................................................................................................................139

Contents
Tables
xii Resistance Temperature Detector 2MLF-RD4A User's Guide R200
Honeywell September 2010
Tables
Table 1 – Performance specifications............................................................................21
Table 2 – Parts of 2MLF-RD4A......................................................................................24
Table 3 – Disconnection detection .................................................................................30
Table 4 – Function of I/O parameters ............................................................................47
Table 5 – Functions of Special Module Monitoring ........................................................56
Table 6 – Conversion data input/output area 1..............................................................69
Table 7 – Conversion data input/output area 2..............................................................74
Table 8 – Operation parameter setting area ..................................................................76
Table 9 – The other data monitoring area......................................................................79
Table 10 – Error information address ..........................................................................107
Table 11 – Details of initial setting ...............................................................................119
Table 12 – Hardware error code list.............................................................................129
Table 13 – Disconnection error code list......................................................................130

Contents
Figures
R200 Resistance Temperature Detector 2MLF-RD4A User's Guide xiii
September 2010 Honeywell
Figures
Figure 1 – Analog value is continuous in time and value .............................................. 19
Figure 2 – Processing in the PLC.................................................................................. 20
Figure 3 – Processing in the PLC.................................................................................. 20
Figure 4 – Parts of 2MLF-RD4A .................................................................................... 23
Figure 5 – Input range of Pt100..................................................................................... 25
Figure 6 – Input range of JPt100 ................................................................................... 26
Figure 7 – Scaled output range of Pt100....................................................................... 28
Figure 8 – 3-Wire RTD................................................................................................... 29
Figure 9 – 2-Wire sensor ............................................................................................... 31
Figure 10 – 3-Wire sensor ............................................................................................. 32
Figure 11 – 4-Wire sensor ............................................................................................. 33
Figure 12 – Time averaging function ............................................................................. 34
Figure 13 – Frequency averaging function.................................................................... 35
Figure 14 – Movement averaging function .................................................................... 36
Figure 15 – Filtering function ......................................................................................... 37
Figure 16 – Process alarm function............................................................................... 38
Figure 17 – Input changing rate alarm function............................................................. 39
Figure 18 – Maximum/minimum display function .......................................................... 40
Figure 19 – 2-Wire sensor ............................................................................................. 42
Figure 20 – 3-Wire sensor ............................................................................................. 43
Figure 21 – 4-Wire sensor ............................................................................................. 44
Figure 22 – Operation procedures................................................................................. 45
Figure 23 – Special Module Monitor.............................................................................. 57
Figure 24 – Monitor menu.............................................................................................. 58
Figure 25– Memory address of CH0 ............................................................................. 75
Figure 26 – Memory address of CH3 ............................................................................ 75
Figure 27 – READY/ERROR flag .................................................................................. 82
Figure 28 – Run channel flag ........................................................................................ 83
Figure 29 – Run channel flag ........................................................................................ 83
Figure 30 – Rate of change alarm flag .......................................................................... 84
Figure 31 – Temperature-converted value .................................................................... 84
Figure 32 – Scaling value .............................................................................................. 85
Figure 33 – Scaling value .............................................................................................. 86
Figure 34 – Data upload time ........................................................................................ 86
Figure 35 – Alarm (PVA/RCA) enable/disable .............................................................. 87
Figure 36 – Channel enable/disable.............................................................................. 88
Figure 37 – I/O Parameter window 1 (channel status) .................................................. 89
Figure 38 – Sensor type setting..................................................................................... 89
Figure 39 – I/O Parameter window 2 (sensor type)....................................................... 90
Figure 40 – Temperature conversion unit...................................................................... 91
Figure 41 – I/O Parameter window 3 (temperature unit) ............................................... 91

Contents
Figures
xiv Resistance Temperature Detector 2MLF-RD4A User's Guide R200
Honeywell September 2010
Figure 42 – Filter value ..................................................................................................92
Figure 43 – I/O Parameter window 4 (filter constant) ....................................................93
Figure 44 – Averaging method.......................................................................................93
Figure 45 – I/O Parameter window 5 (average processing) ..........................................94
Figure 46 – Averaging value ..........................................................................................95
Figure 47 – I/O Parameter window 6 (average value) ...................................................96
Figure 48 – Scaling type ................................................................................................96
Figure 49 – I/O Parameter window 7 (scaling data type)...............................................97
Figure 50 – Scaling range ..............................................................................................98
Figure 51 – I/O Parameter window 8 (scaling range) ....................................................99
Figure 52 – Process alarm limit......................................................................................99
Figure 53 – I/O Parameter window 9 (process alarm limit)..........................................101
Figure 54 – Process alarm hysteresis..........................................................................101
Figure 55 – I/O Parameter window 10 (process alarm HYS).......................................102
Figure 56 – Input variation alarm type .........................................................................103
Figure 57 – I/O parameter window 11 (RCA type).......................................................104
Figure 58 – Input variation alarm maximum/minimum value .......................................104
Figure 59 – I/O Parameter window 12 (RCA value).....................................................105
Figure 60 – Detection cycle of input variation alarm ....................................................106
Figure 61 – I/O Parameter window 13 .........................................................................106
Figure 62 – Setting error information ...........................................................................108
Figure 63 – Input variation value/rate output ...............................................................108
Figure 64 – Special Module Monitoring window ..........................................................109
Figure 65 – Flag monitoring window ............................................................................110
Figure 66 – Sensor disconnection information.............................................................111
Figure 67 – Read execution .........................................................................................113
Figure 68 – Example of read execution .......................................................................114
Figure 69 – Example of write execution.......................................................................114
Figure 70 – Example of write execution.......................................................................115
Figure 71 – I/O parameter setting window 1 ................................................................116
Figure 72 – Parameters settings for RTD module .......................................................117
Figure 73 – Basic program example post I/O parameter setting .................................117
Figure 74 – Basic program example using PUT/GET instruction ................................118
Figure 75 – System configuration ................................................................................119
Figure 76 – I/O Parameter Setting window 2 ...............................................................120
Figure 77 – Parameters settings for RTD module .......................................................121
Figure 78 – Application program example post I/O parameters setting.......................121
Figure 79 – Application program example with PUT/GET instruction used.................122
Figure 80 – System configuration ................................................................................123
Figure 81 – I/O Parameter Setting window 3 ...............................................................124
Figure 82 – Parameters settings for RTD module .......................................................124
Figure 83 – Special Module Monitoring window (flag monitor) ....................................125
Figure 84 – Temperature measuring module command window.................................126

Contents
Figures
R200 Resistance Temperature Detector 2MLF-RD4A User's Guide xv
September 2010 Honeywell
Figure 85 – Program example post I/O parameters setting ........................................ 126
Figure 86 – Program example with PUT/GET instruction used................................... 127
Figure 87 – Troubleshooting when RUN LED is flickering .......................................... 131
Figure 88 – Troubleshooting when RUN LED is OFF ................................................. 132
Figure 89 – Troubleshooting when CPU cannot read temperature conversion value 133
Figure 90 – Troubleshooting when RTD input is not consistent with detected value.. 134
Figure 91 – Special Module Information window......................................................... 136

Contents
Figures
xvi Resistance Temperature Detector 2MLF-RD4A User's Guide R200
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R200 Resistance Temperature Detector 2MLF-RD4A User's Guide 17
September 2010 Honeywell
1. Introduction
1.1 Introduction to Resistance Temperature Detector
This user’s guide describes the specifications, handling, and programming methods of
Resistance Temperature Detector (RTD), 2MLF-RD4A module.
The RTD input module converts the input temperature data (analog value) measured by
platinum RTD sensor (Pt100 or JPt100), to signed 16-bit binary data (digital value).
This module is used in association with CPU module of MasterLogic-200 PLC series
(hereafter referred to as 2MLF-RD4A).
1.2 Features
2MLF-RD4A has following features:
1. Module Selection: You can select an appropriate input module based on the
application requirement.
2MLF-RD4A: 4-channel input
2. Choice of RTD Sensors: Two types of RTD sensors are available:
a) Pt100
b) JPt100
3. Disconnection Detection: A function to display the connection status of each wire
of the RTD sensor and channel. The internal disconnection detecting circuit detects
and displays disconnection of RTD sensor wire or extended lead wire from the RTD
module. This results in an ‘Out-of-range’ error in the output voltage.
4. Temperature Conversion:
a) Temperature can be converted to Celsius or Fahrenheit scale as desired.
b) It can also be converted to numeric value accurate up to the first decimal
place.
5. Temperature Scaling:
a) Temperature-converted input value can be scaled to specified 16-bit binary
data.

1. Introduction
1.2. Features
18 Resistance Temperature Detector 2MLF-RD4A User's Guide R200
Honeywell September 2010
b) Temperature-converted value can be within the range of -32768–32767 or 0–
65535 after scaling.
6. Supplementary functions:
a) Filtering
b) Averaging (time/frequency/movement)
c) Alarm (for process/input change)
d) Maximum/Minimum detection, and so on.
7. Parameter setting and data monitoring using Graphical User Interface (GUI):
The need of sequence programming is significantly reduced due to the availability of
the GUI.
It helps in setting the necessary parameters as well as monitoring the RTD module
through the ‘Special Module Monitor’ function.
The RTD module configuration parameters can be entered in the I/O parameter
setting option in SoftMaster, this feature reduces the need of programming for
configuring the module. In addition, temperature-converted value can be monitored
using Special Module Monitor function.

1. Introduction
1.3. Terminology
R200 Resistance Temperature Detector 2MLF-RD4A User's Guide 19
September 2010 Honeywell
1.3 Terminology
The terminology used in this document is as follows:
Analog value – A
A physical quantity like temperature, pressure, speed, current, and so on, which changes
continuously with time, is called an analog value. The PLC cannot process an analog
quantity. The RTD input module converts analog input temperature value to
corresponding digital value which then can be processed by the PLC.
Figure 1 – Analog value is continuous in time and value
For example, temperature changes continuously with time, as shown in Figure 1.
Digital value - D
In a digital electronic circuit, data is processed and saved in the form of numbers 0 and 1.
The data is processed as a string of 0s and 1s. For example, ON and OFF signals displays
as 1 and 0, respectively, in a digital system. This is called as the binary numbering
system. Decimals stored in binary format are called Binary Coded Decimals (BCD).
BCD is thus a digital value. Figure 2 displays the digital value of the physical parameter
(temperature).

1. Introduction
1.3. Terminology
20 Resistance Temperature Detector 2MLF-RD4A User's Guide R200
Honeywell September 2010
Figure 2 – Processing in the PLC
Analog values cannot be given as input to the CPU module, as the PLC processes only
binary numbers (digital values). The conversion from analog to digital value (as shown in
Figure 3) is required. This is done using analog to digital converter (A/D conversion
module). Similarly, to get an analog output from a digital value, a digital to analog (D/A)
conversion module is used.
Figure 3 – Processing in the PLC
Platinum resistance temperature detector (RTD)
RTD is a sensor that detects temperature. The change in the resistance value of this
device is directly proportional to the temperature. The resistance of these devices
increases with temperature. At 0°C temperature, Pt100/JPt100 has the resistance value of
100.00Ω