Operations In Case Of Errors - Fuji Electric FRENIC-AQUA series User Manual

3.3.2

Operations in case of errors

The action when a transmission or communications disconnection error occurs can be selected
with function code y02, y12. (For further information, see Section 2.4 "Making RS-485-related
settings.")
This section shows specific examples of action by different settings of function code y02. (The
same operation is performed for y12 as well. In this case, the y02 and y03 in the figure are
replaced with y12 and y13, and the error indication becomes ErP.
When y02 = 0 (mode in which the inverter is forced to immediately stop in case of
communications error)
Communications status
Display
FWD
Command
from RS485 RS-485
Set
frequency
Operation
command
Inverter's Set
internal
frequency
operation
Output
frequency
When y02 = 1 and y03 = 5.0 (seconds) (mode in which the inverter is forced to stop five
seconds after a communications error occurred)
Communications status
Display
FWD
Command
from RS485 RS-485
Set
frequency
Operation
command
Inverter's
Set
internal
frequency
operation
Output
frequency
*1 For the period until communications is recovered, the command (command data, operation data)
executed just before the communications error had occurred is retained.
Error
Normal Normal
Regular
Transmission failed
ON
ON
Operation
Free run
Error
Normal
Normal
Regular
5.0s
*1
ON
Operation
The inverter accelerates to the set frequency even if
a transmission error occurs during acceleration.
3-17
3.3 Communications Errors
Alarm reset
Er8
Er8
Stop Operation
Alarm reset
Er8
Er8
OFF ON
Stop Operation
Free run