Chap. 6 Analog I/O Module (XBF-AH04A)
6.6.5 Channel Output Status Setting Function
This function sets up the output in response to PLC shutdown or failure.
(1) Function
This function is used to obtain preset output value of the analog I/O module when the PLC
system is transferred from run to stop.
(2) Type
Channel output can be one of the followings;
(a) Previous value: maintains the last output from normal operation.
(b) Minimum: outputs the least values of the respective output ranges.
(c) Median: outputs the median values of the respective output ranges.
(d) Maximum: outputs the largest values of the respective output ranges.
(3) Example
Assume that the output channel range is set to 4 ~ 20mA and the output level is 10mA. If the
PLC system is switched from run to stop status, the output will be one of followings according to
the setting;
(a) Previous value: maintains 10mA which is the previous normal operation value.
(b) Minimum: outputs 4mA which is the minimum of the output range setting.
(c) Median: outputs 12mA which is the median of the output range setting.
(d) Maximum: outputs 20mA which is the maximum of the output range setting.
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