RS-485 Communication Features
5.2.4 Command Loss Protective Operation
Configure the command loss decision standards and protective operations run when a
communication problem lasts for a specified period of time.
Command Loss Protective Operation Setting Details
Code Description
PRT-12 Lost Cmd
Mode,
PRT-13 Lost Cmd
Time
Select the operation to run when a communication error has occurred and
lasted exceeding the time set at PRT- 13.
The speed command immediately becomes the
operation frequency without any protection
function.
The inverter blocks output. The motor performs in
free-run condition.
The motor decelerates and then stops at the time
set at PRT-07 (Trip Dec Time).
The inverter calculates the average input value for
10 seconds before the loss of the speed command
and uses it as the speed reference.
The inverter calculates the average output value for
10 seconds before the loss of the speed command
and uses it as the speed reference.
The inverter operates at the frequency set at PRT-
14 (Lost Preset F).