540
Temperature Sensor Units
Section 9-5
Connecting Temperature
Sensors
Thermocouples
Either K or J thermocouples can be connected, but all twelve of the thermo-
couples must be of the same type and the same input range must be used for
each.
Note
When connecting a thermocouple input, observe the following precautions:
• Do not remove the cold junction compensator attached at the time of
delivery. If the cold junction compensator is removed, the Unit will not be
able to measure temperatures correctly.
• Each of the input circuits is calibrated with the cold junction compensator
attached to the Unit. If the Unit is used with the cold junction compensator
from other Units, the Unit will not be able to measure temperatures cor-
rectly.
• Do not touch the cold junction compensator. Doing so may result in incor-
rect temperature measurement.
• Use the thermocouple with metallic shield and connect the shield to
ground.
Open-circuit Detection
Function for Temperature
If the circuit is disconnected, the open-circuit detection function will operate
and the converted temperature data will be set to 7FFF.
Creating a Ladder
Program
Word Allocations
Temperature Sensor Units are allocated words in the same way as other CP-
series Expansion Units or Expansion I/O Units, in order of connection. A Tem-
perature Sensor Unit is allocated the next input words following the input
words of the CPU Unit or previous Expansion Unit or Expansion I/O Unit. Two
input words and one output word are allocated to CP1W-TS004.
Example
Temperature Data Read Operation
There are 12 temperature input data to be read, but only two input words are
allocated to CP1W-TS004. The operation is shown as the following.
Temperature input 0
Temperature input 1
Temperature input 11
Cold junction
compensator
CIO 102
CP1L-EM CPU Unit
with 40 I/O points
Input word
addresses
Output word
addresses
CIO 0
CIO 1
CIO 100
CIO 101
CIO 2
CIO 3
CP1W-TS004
Temperature Sensor Unit
Summary of Contents for CP1L-EL20DR-D
Page 3: ...CP1L EL20D CP1L EM30D CP1L EM40D CP1L EL EM CPU Unit Operation Manual Produced July 2017...
Page 4: ...iv...
Page 10: ...x...
Page 22: ...xxii...
Page 34: ...xxxiv Software Licenses and Copyrights 7...
Page 192: ...158 Trial Operation and Debugging Section 5 3...
Page 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Page 666: ...632 Trouble Shooting Section 11 7...
Page 696: ...662 Standard Models Appendix A...
Page 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Page 836: ...802 PLC Setup Appendix G...
Page 838: ...804 TCP Status Transitions Appendix H...
Page 840: ...806 Ethernet Network Parameters Appendix I...
Page 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Page 844: ...810 Ethernet Specifications Appendix K...
Page 851: ...Index 817 work words 118 write protection 447...
Page 852: ...818 Index...
Page 854: ...820 Revision History...
Page 855: ......