Omron E5CN-HT Communications Manual page 91

● 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).
• In Manual Mode 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 variable data 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 execution is specified dur ing 100% AT
execution), the AT will not be restarted and the operation will end
in normal completion with no processing.
● Write Mode
Set either "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.
Write mode
Backup mode
RAM write mode
• When you switch from RAM Write Mode to Backup Mode, the param-
eters in the operation, adjustment, program setting, and PID setting
levels (excluding read-only parameters) are written to non-volatile
memory.
4.4 Detailed Description of the Services
Description
The data is written to non-volatile memory when a
parameter in the operation, adjustment, program
setting, or PID setting level (excluding read-only
parameters) is written using communications.
The data is not written to non-volatile memory
when a parameter in the operation, adjustment,
program setting, or PID setting level (excluding
read-only parameters) is written using communica-
tions. Parameters can be changed by using key
operations on the front panel of the Controller.
4-17