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ATR 121 in PID, HyC (dead band), H.o.o parameter meaning

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user10989
Posts: 9
Joined: 16/04/2015, 13:59

ATR 121 in PID, HyC (dead band), H.o.o parameter meaning

Post by user10989 »

Hello,
Could you please explain by a simple example what is parameter HY.C (dead band with ATR 121 in PID) meaning/ purpose? Also what is the difference between rEG = HEA and rEG = H.o.o?
Thx
Pixsys tecnico 6
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Posts: 1184
Joined: 12/09/2016, 14:49

Re: ATR 121 in PID, HyC (dead band), H.o.o parameter meaning

Post by Pixsys tecnico 6 »

Hi,
the Hy.C parameter is the Hysteresis if you use ON/OFF regulation mode. If you use PID regulation mode Hy.C is the Dead Band.
If you set the REG parameterer as HEA, the command output is ON under your setpoint (ON/OFF mode), but if you use PID the Proportional Band is centered on the setpoint. If you set REG as H.o.o. (using PID mode) when the temperature is over the Setpoint the command output is OFF.

Best Regards
user10989
Posts: 9
Joined: 16/04/2015, 13:59

Re: ATR 121 in PID, HyC (dead band), H.o.o parameter meaning

Post by user10989 »

Yes, thanks a lot. Just one more thing. If the process is heating ONLY (no cooling) with oil as heating fluid, do you advise to set parameter 33. (cooling fluid) c.o.F to Oil or leave it Air by default?
Regards
Pixsys tecnico 6
Moderatore
Posts: 1184
Joined: 12/09/2016, 14:49

Re: ATR 121 in PID, HyC (dead band), H.o.o parameter meaning

Post by Pixsys tecnico 6 »

Hi,
leave it by default value.

Best Regards.
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