C7-1
IM 34M06H62-02E 2nd Edition : June 2008-00
C7. Operation Control
C7.1 Run/Stop Switch
Setting the Run/Stop Selection (RUN/STP) parameter to “0: Stop” stops PID
computation, and outputs the preset output. The preset output is output as is,
unconstrained by the upper and lower output limits. The output rate-of-change limit is
also disabled in Stop mode.
The output value in Stop mode depends on the Control Type Selection (OT) as shown in
the table below.
Table C7.1 Control Output in Stop Mode
OT Control Output (HOUT)
Cooling Control Output (COUT)
0 Preset output (POUT) 0%
1 0% if preset output (POUT) ≤ 0.0%;
100.0% if POUT ≥ 0.1%
0%
2 Preset output (POUT) Cooling preset output (POUT.C)
3 0% if preset output (POUT) ≤ 0.0%;
100.0% if POUT ≥ 0.1%
0% if cooling preset output (POUT.C) ≤ 0.0%;
100.0% if POUT.C ≥ 0.1%
Switching from “Run” to “Stop” bumps the output value to the preset output.
For details on the operation after switching from “Stop” to “Run,” see Section C7.1.1,
“Operation after Switching from Stop Mode to Run Mode”
POUT
Stop Run
Output limiter
STP/RUN
HOUT
Result of PID
computation
Switching between
Run and Stop
Figure C7.1 Block Diagram for RUN/STP Parameter
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