Rockwell Automation 1771-TCM TEMPERATURE CONTROL - Manual (Page 10)

1–3 Interfacing with the Temperature Control Module
Publication 1771Ć6.4.5 - January 1997
The following graphic illustrates how the individual data blocks are
sent to and returned from the TCM module.
Configuration Block for Loop 2
26 words
Configuration Block for Loop 1
26 words
Configuration Block for Loop 3
26 words
Configuration Block for Loop 4
26 words
Configuration Block for Loop 5
26 words
Configuration Block for Loop 6
26 words
Configuration Block for Loop 7
26 words
Configuration Block for Loop 8
26 words
Gains Block
57 words
System Status Block
64 words
Calibration Write Block
20 words
AutoĆTune Block
57 words
1771ĆTCM Module PLC Data Table
Input Byte
BlockĆTransfer
BlockĆTransfer
BlockĆTransfer
BlockĆTransfer
BlockĆTransfer
BlockĆTransfer
BlockĆTransfer
BlockĆTransfer
BlockĆTransfer
BlockĆTransfer
BlockĆTransfer
BlockĆTransfer
Calibration Read Block
14 words
BlockĆTransfer
Output Byte
Dynamic Block
34 words
BlockĆTransfer
SingleĆTransfer
SingleĆTransfer
The computer with the Temperature Control software communicates
with the PLC processor across a local DH+ link or a DF1 serial link.
Important: For configuring temperature control loops, you can not
have the computer on one DH+ link and have the PLC
processor on another (remote) DH+ link even if they are
in the same DH+ network.
As shown in the following graphic, after entering configuration
selections at the computer, you can download them to disk files
and/or the PLC processor’s data-table interface area for use by the
module. Later, you can upload configuration selections from either
the disk files or the PLC processor’s data-table interface area for
making changes.
How the Temperature
Control Software
Interfaces with PLC
Processors