Omron E5CN-HT Communications Manual page 45

(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/Reset
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.
● 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/Reset parameter is set to Reset (and the reset
operation is set to stop control).
• During standby status (when the reset operation is set to stop
control).
• During manual operation or when executing from 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.
• When 100% AT execute/cancel or 40% AT execute/cancel is
assigned to an event input.
In addition, a parameter error will occur if 40% AT is specified during
heating and cooling control or during position-proportional floating
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 restar ted and the operation will end in normal
completion with no processing.
● Write Mode
Set either the backup mode or RAM write mode with the related infor-
mation setting. The setting can be accepted in both setup area 0 and
setup area 1.
The number of non-volatile memory write operations is limited.
Therefore, use RAM write mode when frequently overwriting data.
2.3 Detailed Description of the Services
2-21