Rockwell Automation 1771-PD PID MODULE (+DU) - Manual (Page 189)

Application Example 2, Periodic Block
Transfer
Appendix C
CĆ5
Indicators have been programmed to illuminate if any of the following
conditions should occur:
an alarm condition is detected by the module
the manual control station is in manual mode
the PID module is powered and waiting for a load/enter sequence
the load/enter sequence failed
a read block transfer is delayed or lost
The ladder diagram program for PLC-2 family processors that use block
format instructions is presented on the next three pages.