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MELSEC-Q
3 SPECIFICATIONS
3.2.6 Unused channel setting function
(1) Unused channel setting
(a) When Q62HLC made unused channel setting, an alert will not occur at the
channel without connecting a sensor, and the ALM LED will not be flicker.
The sampling period remains unchanged if the unused channel setting is
performed.
(b) To make unused channel setting, write "1" to the unused channel setting.
(buffer memory address: 61, 93)
(2) Channels where temperature sensors are not connected
In Q62HLC, if a sensor is not connected, the same operation as when the input
disconnection is performed. For details, refer to Section 3.1.2.
3.2.7 Forced PID control stop function
(1) Forced PID control stop
Forced PID control stop is a function to stop PID operations temporarily from
the programmable controller CPU.
For details of the Q62HLC control status with the forced PID control stop, refer
to Section 3.2.16.
(2) Normal control mode, manual control mode
(a) Executing forced PID control stop
To execute a forced PID control stop, turn on the forced PID control stop
command (YnC, YnD).
When the PID operation is stopped, the operation of the Q62HLC differs
depending on the stop mode setting (buffer memory address: 33, 65).
And the manipulated value storage (MV) (buffer memory address: 13, 14) is
-50 (-5.0%).
(b) Cancelling forced PID control stop
When the 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 the lower output limiter (buffer memory address: 43, 75).
(3) Program control mode
To execute a forced PID control stop, turn on the forced PID control stop
command (YnC, YnD).
(a) Executing forced PID control stop
When PID operation is forced to stop during program control,
the Q62HLC operation is to be RESET.
(b) Cancelling forced PID control stop.
When the forced PID control stop command (YnC, YnD) turns off,
the forced PID control stop is cancelled, and program control is executed.
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