Mitsubishi MELSEC iQ-R series, User Manual

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6 INSTALLATION AND WIRING
6.5 Unused Channel Setting
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6.5
Unused Channel Setting
When no temperature sensor is connected to a channel, the temperature control module performs upscale processing for the
channel. Therefore, when no temperature sensor has not been connected to a channel where no temperature control is to be
performed, the module determines that the temperature process value (PV) has exceeded the temperature measuring range
for the input range, and the ALM LED blinks.
Setting unused channels can prevent faulty alert detection because the PID control, temperature judgment, and alert
judgment are not executed on the set channels.
Setting method
Set a value in "Unused channel setting" of "Control basic parameters" of "Application Setting". The following table shows the
relation between each setting value and control status.
Setting unused channels does not change the sampling cycle.
Setting value Control status
PID control Temperature judgment Alert judgment
Used (0) Performed (However, it depends on other setting status.)
Unused (1) Not performed