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On/off controller within APL

11/4/2022 10:40 AM	Rate (0)
DDo84 Advanced Member Joined: 12/9/2019 Last visit: 6/30/2023 Posts: 12 Rating: (0)	Hi experts, Is there a standard block/template available in the APL (V9.1) for an on/off controller? By on/off controller, I mean a controller that compares a PV with a SP + dead band and switches a digital output (see https://automationforum.co/basics-off-controller/ for a detailed explanation). Output ON: PV > (SP + dead band) Output OFF: PV < (SP - dead band). Offcourse I can create this type of controller by myself with various blocks within the APL, but then I miss a clear and all-encompassing faceplate on SCADA (like the one of a PID controller - PidConL). Anyone who can assist me with this? Thank you in advance!
	Last edited by: DDo84 at: 11/04/2022 12:48:47
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11/5/2022 10:10 PM	Rate (0)
cristian021091 Experienced Member Joined: 2/22/2021 Last visit: 3/24/2024 Posts: 114 Rating: (13)	I was searching the manual for basic library and advanced process library and found nothing. Why don't you use comparators and create a basic faceplate in WinCC? Do you need many of these controls?

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This contribution was helpful to 2 thankful Users DDo84 Heisenberg2

11/8/2022 12:35 PM	Rate (1)
Heisenberg2 Gold Member Joined: 5/3/2017 Last visit: 2/6/2025 Posts: 673 Rating: (219)	Hi DDo84, without any additional blocks it is possible to use the APL block "PIDConL". Set the input "Gain" to 99999999, "IntSel" = 0 and "DiffSel" = 0. With this setup the MV value will jump between the high and low value. And use the outputs "MV_HiAct" and "MV_LoAct" as On/Off-signals. And you have already the faceplates. With regards Heisenberg

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This contribution was helpful to 1 thankful Users DDo84