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8.2
Output HOLD/CLEAR Setting Function
When the I/O module is disconnected from data link, or the CPU module operating status is STOP, whether to hold or clear
the last output value can be set by this function.
Output HOLD/CLEAR setting and its operation
When HOLD or CLEAR is set for an output, the output is turned on or off as follows.
Operating status
Data link in operation
CPU module in RUN
CPU module in STOP
CPU module in PAUSE
CPU module in RESET
CPU module suspended by
error
During disconnection/cyclic stop
If a moderate or major error has occurred in the I/O module, output turns off regardless of the output HOLD/CLEAR setting.
Setting method
1.
Set HOLD or CLEAR using the function setting switch 4 of I/O module.
Function setting switch 4
OFF
ON
The setting status of output HOLD/CLEAR setting can be checked by bit3 of detailed module information (upper).
For details, refer to the following.
Page 126 Detailed module information (upper)
Output HOLD/CLEAR setting
HOLD
Last output status
Last output status
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Output HOLD/CLEAR setting
CLEAR (default)
HOLD
Output HOLD/CLEAR setting
CLEAR
Last output status
Last output status
OFF
ON
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
8 FUNCTIONS
8.2 Output HOLD/CLEAR Setting Function
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