Unused Channel Setting Function; Forced Pid Control Stop Function - Mitsubishi Electric MELSEC-Q Series User Manual

3 SPECIFICATIONS

3.2.6 Unused channel setting function

3.2.7 Forced PID control stop function

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(1) Unused channel setting
This function sets the channel status (used/unused).
(a) When a channel of the Q62HLC is set to be unused, an alert will not occur
at the channel where no sensor is connected and the ALM LED does not
flash.
The sampling period remains unchanged even if the unused channel setting
is configured.
(b) To set a channel to be unused, write 1 in Unused channel setting (buffer
memory address: 61, 93).
(2) Channel where no sensor is connected
When no sensor is connected to the channel, The Q62HLC performs the same
processing as that of input disconnection. For details, refer to Section 3.1.2.
(1) Forced PID control stop
This function temporarily stops PID operations of the programmable controller
CPU.
For details of the Q62HLC control status with the forced PID control stop, refer
to Section 3.2.19.
(2) Normal control mode, manual control mode
(a) Executing forced PID control stop
To execute a forced PID control stop, turn on Forced PID control stop
command (YnC, YnD).
When the PID operation is stopped, the operation of the Q62HLC differs
depending on Stop mode setting (buffer memory address: 33, 65).
The value in Manipulated value (MV) (buffer memory address: 13, 14) will
be -50 (-5.0%).
(b) Cancelling forced PID control stop
When Forced PID control stop command (YnC, YnD) is turned off, a forced
PID control stop is cancelled and the PID operation restarts from setting
value of Lower output limiter (buffer memory address: 43, 75).
(3) Program control mode
(a) Executing forced PID control stop
To execute a forced PID control stop, turn on Forced PID control stop
command (YnC, YnD). When the PID operation is stopped during program
control, the operation of the Q62HLC is reset.
(b) Cancelling forced PID control stop.
When Forced PID control stop command (YnC, YnD) is turned off,
the forced PID control stop is cancelled, and program control is executed.
MELSEC-Q
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