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2 CompoWay/F Communications Procedures
(3) Operation Commands and Precautions
• Communications Writing
Set the Communications Writing parameter to "ON: enabled" or "OFF: disabled" with the related
information setting. The setting can be accepted in both setup area 0 and setup area 1. An
operation error will occur, however, if enabling or disabling communications writing is set for an
event input.
• RUN/STOP
Set control to "run" or "stop" with the related information setting. The setting can be accepted in
both setup area 0 and setup area 1.
• Multi-SP
Set eight set points beforehand in the adjustment level so that you can switch to a desired set
point. The setting can be accepted in both setup area 0 and setup area 1. An operation error will
occur in the following situations.
• When the Number of Multi-SP Points parameter is set to OFF.
• When a set point that exceeds the value that is set for the Number of Multi-SP Points
parameter is specified.
Example: If the Number of Multi-SP Points is set to 2, you can change set point 0 or set point
1. An operation error will occur for an operation command for which set point 2 or higher is
specified in the related information.
An operation error will occur in the following situations.
• When AT is being executed.
• AT Execute/Cancel
Set AT (auto-tuning) to "execute" or "cancel" with the related information setting. This command
can be accepted in setup area 0 only. An "operation error" will be generated in the following
instances:
• When the RUN/STOP parameter is set to "stop"
• When the command is executed in "setup area 1"
• When ON/OFF control is being used
• When 40% AT is specified during 100% AT execution.
• When 100% AT is specified during 40% AT execution.
A parameter error will occur if 40% AT is specified during heating and cooling control.
Note: If the same type of AT execution is specified during AT execution (e.g., if 100% AT is specified during
100% AT execution), the AT will not be restarted and the operation will end in normal completion with
no processing.
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E5@D Digital Temperature Controllers Communications Manual (H225)
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