Mitsubishi Electric MELSEC-Q Series User Manual page 90

3 SPECIFICATIONS
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(3) Control status selection when switching to program control
When the normal control mode is switched to the program control mode or the
manual control mode is switched to the program control mode in the operation
mode (Xn1: on), the control status at switching can be selected.
Set the control status at switching with the intelligent function module switch
setting (Switch 2).
Refer to Section 4.5 for the intelligent function module switch setting.
(a) When Program control run/reset (buffer memory address: 57,
89) is set to 1
Control details
PID control
Alert status
Loop disconnection alert
Approach flag
Cascade control
(b) When Program control run/reset (buffer memory address: 57,
89) is set to 0
The control status become as follows regardless of the setting of the
Intelligent function module switch setting (Switch 2).
Control details
PID control
Alert status
Loop disconnection alert
Approach flag
Cascade control
POINT
Check the following when the mode is switched to the program control mode in the
operation mode (Xn1: on).
1) Set the start mode setting to PV starting 1 (Time fixed) or PV starting 2 (Time
shortened).
2) Check that there is no error in each parameter setting for the program control.
Control status
Set 1 for switch 2
Continue
Continues the processing in
accordance with the set and
measured values.
Suspends cascade control.
Perform PID control while
suspending the control.
Control status
MELSEC-Q
Set other than 1 for switch 2
Suspends PID control.
The manipulated value (MV)
becomes -50 while
suspending the control (for
25ms).
Clear
Suspends PID and cascade
controls. Resume the
cascade control from a
maximum of 25ms after
resuming the PID control.
Stop
Clear
Stop
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