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CHAPTER 5 SETTINGS AND THE PROCEDURE BEFORE OPERATION
5
5.5 Unused Channel Setting
5.5 Unused Channel Setting
When no temperature sensor is connected to a channel, the Q64TCN performs upscale processing for the channel.
Therefore, when a temperature sensor is not connected to a channel where no temperature control is performed, the
module determines that the temperature process value (PV) has exceeded the temperature measurement range for
the input range, and the ALM LED blinks.
Once the unused channel setting is configured, no alarm will occur for a channel where a temperature sensor is not
connected. To prevent faulty alert detection, configure the unused channel setting.
(1) Setting method
Set a value in CH unused channel setting (Un\G61, Un\G93, Un\G125, Un\G157).
For details on the setting, refer to the following.
Page 126, Section 3.4.2 (35)
The following table shows the relationship between the setting value and control status.
Remark
Even if the unused channel setting is configured, the sampling cycle does not change.
Set value
Control status
PID control Temperature judgment Alert judgment
0: Used
The controls are performed.
(However, it depends on other setting status.)
1: Unused The controls are not performed.