Manual

Introduction to the Temperature Control Module
Chapter 1
1-3
The barrel temperature control module communicates with the PLC
processor by both block-transfer and single-transfer. The ladder logic must
include block-transfer write instructions to send the following data blocks
to the module:
a configuration block for each PID loop (8 max)
gains block
dynamic block
calibration block (not required for normal operation)
The ladder logic must include block-transfer read instructions to get the
following data blocks from the module:
system status
gains block
calibration block (not required for normal operation)
The ladder logic must also include instructions for dealing with an input
image byte single-transferred from the module. This byte contains the
control-variable output of each loop as the duty cycle of a bit that is cycled
at a regular period. Each bit represents one of the 8 PID loops.
Configuration Block for Loop 2
23 words
Configuration Block for Loop 1
23 words
Configuration Block for Loop 3
23 words
Configuration Block for Loop 4
23 words
Configuration Block for Loop 5
23 words
Configuration Block for Loop 6
23 words
Configuration Block for Loop 7
23 words
Configuration Block for Loop 8
23 words
Gains Block
57 words
System Status Block
64 words
Calibration Write Block
20 words
Dynamic Block
34 words
1771TCM ModulePLC Data Table
Singletransfer
Input Byte
Blocktransfer
Blocktransfer
Blocktransfer
Blocktransfer
Blocktransfer
Blocktransfer
Blocktransfer
Blocktransfer
Blocktransfer
Blocktransfer
Blocktransfer
Blocktransfer
Calibration Read Block
14 words
Blocktransfer
Output Byte
Singletransfer
How the Temperature
Control Module
Communicates with
Processors