Super Systems 20PQ - Manual (Page 139)

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OUTPUT POWER OFF FUNCTION during controller mode
By this mode it is possible to disable the process control.
In this mode, the instrument operate as an indicator and:
- the middle display shows O.P.O.;
- the lower display and the bargraphs are void;
- the time proportional control outputs are set to zero;
- the linear control outputs are set to the initial scale value;
- the servomotor output maintain the same position has prior to
the power output mode.
- all alarms are in “NO alarm condition”;
- all the events not related with the end of program or with the
Output Power OFF mode are in OFF condition;
- all the logic input status are ignored;
- all the analog retransmissions are forced to the initial scale
value.
It is possible to program a digital output (event) in order to signal
when the instrument is in OPO mode.
When the instrument is turned off in OPO mode, at power up it
restarts in the same way.
Exiting from O.P.O. mode, the instrument operates as in
presence of a power on condition and the alarm masking and
the soft start functions will be enabled.
It is possible to activate/deactivate the O.P.O. mode by keyboard
or by serial link .
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