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Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION
Others
C72
[mode key function]: 7 (COM DI1 selection)
SP ramp-up/ramp-down: Desired value
Setting points
The internal EV1 is substituted for the guarantee soak.
Therefore, “9999” is set to the hysteresis of Event 1 so that Event 1 is not turned
OFF after it has been turned ON even though the PV fluctuates.
DI Assignment (Internal Contact 1): Input/Output port setup
Logical AND of COM DI1 (A-contact)
and timer (B-contact)
Mode (RUN/READY) selection
contact
Reversed at this point since the
mode is the READY mode when
turned ON.
DI Assignment (Internal Contact 2): Input/Output port setup
The timer start is self-retained at time-up so that
the timer is not restarted due to change in PV.
Timer start-up contact
Conditions for guarantee soak (ramp is completed and operation enters
within the deviation of the nal SP.)
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