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MELSEC-Q
3 SPECIFICATIONS
3.5.12 Stop mode setting (buffer memory address 33, 65: Un\G33, Un\G65)
(1) Set the mode when the PID operation is stopped
by the forced PID control stop command (YnC, YnD).
The default value is set to "monitor".
(2) Operation varies with the mode setting made as indicated below.
Operation
Setting mode Set value
PID
operation
Temperature
judgment
Alert
judgment
Stop 0
Monitor 1
Alert 2
: Executed
: Not executed
Operation is governed by the unused channel setting, setting/operation mode
status setting, PID continuation flag, PID control forced stop command and
CPU error stop-time control output setting. (Refer to Section 3.2.16.)
(a) Measured value judgment: Measured value checks whether it is within the
input range setting.
(b) Alert judgment: Alert checks 1 to 4 are made.
POINT
The default value (initial value) of the stop mode is set to "monitor".
Hence, the channel without a temperature sensor connected results in a sensor
input disconnection and the "ALM" LED is flicker.
For the channel to which a temperature sensor is not connected, set "1 (unused)"
to the unused channel setting (buffer memory address: 61, 93).
3.5.13 Set value (SV) setting (buffer memory address 34, 66: Un\G34, Un\G66)
(1) Sets the set value of PID operation.
(2) The setting range is within the input range specified in the input range setting
(refer to Section 3.1.1 (1), 3.5.11).
(3) Setting a value outside the setting range will result in a write error, turn on the
error flag (Xn2), and store the error code (4) to address 0 of the buffer memory.