Rockwell Automation 1771-TCM,D17716.5.108 TEMPERATURE CONTROL MOD - Manual (Page 94)

Example Ladder Logic Program
Appendix C
C-2
This program uses the following program files.
Program File Use
2 Main program file
4 TPO bits from I/O
30 Subroutine to execute blockĆtransfer read from TCM
32 Subroutine to service complete blockĆtransfer read from TCM
33 Subroutine to check for required upholds from TCM
35 Subroutine to copy configuration files
40 Subroutine to service TCM blockĆtransfer write functions
42 Subroutine to check for required download to TCM
43 Subroutine to load command block for TCM
44 Subroutine to execute blockĆtransfer write to TCM
45 Subroutine to service complete blockĆtransfer write to TCM
Program File 2
This program file handles the block-transfers to the TCM module.
Program file 30 is called from this program file to execute a BTR from the
TCM module every scan. Program file 40 is called from this program file
to check whether the BTW is required to the TCM module.
Important: The ladder logic constantly checks the dynamic block for
changes, and will automatically send it out if a change is made in the
dynamic block.
Program File 4
This program file is the second main control program file. This file reads
the input status from the TCM module and loads the heat and cool
time-proportioned output (TPO) bits into B20:1.
Program File 35
This program file copies the configuration information from loop 1 into all
7 remaining loops when bit B21:5/15 is on.
This program requires the following data-table layout use in the TCM test
ladder logic.
Program Files
Data Table Layout