Content
# CCSD WWTP RAS/WAS
WAS - provide an interval (60min) and a duration (3.25min), and alternation, HOA in Auto allowing it to be called in the alternation
RAS - Flow control, GPM setpoint, PID in PLC,
IO:
RAS1
DO - Start Cmd
AO - Speed Cmd
AI - Speed Feedback
DI - Fault?
RAS2
DI - Start Cmd
AO - Speed Cmd
AI - Speed Feedback
DI - Fault?
WAS1
DO - Start Cmd
DI - Running
WAS2
DO - Start Cmd
DI - Running
Flow Meter1
AI - Flow Signal
Flow Meter2
AI - Flow Signal
Are there any HOA signals from the switches to the PLC?
Other items to Discuss:
* Connection to designer
* Model of PLC (new or existing)
* If existing, can i get a copy of the program to add the new logic to?
* IO modules installed in PLC? (if new)