Inverter Parameters
49
Set value
Description
3
Hold Input
The inverter continues operating according to the speed
reference input received before the loss of speed.
4
Hold Output
The inverter continues operating according to the frequency
reference received before the loss of speed.
5
Lost Preset
The inverter operates at the frequency set at "Pr-14 (Lost
Preset F)."
7.4.2 Command Loss Decision Time
–Lost Cmd Time (Pr-13)
Drv
Cmd Source
Frq
Freq Ref Src
Pr-12
Lost Cmd Mode
Pr-13
Lost Cmd Time
The inverter decides that the communication command is lost If the PDO
communication loss lasts longer than the "communication command loss decision
time."
To utilize the lost command operation, the "drv" parameter must be set to "4
(Fieldbus)" or the "Frq"parameter must be set to "8 (Fieldbus)."
The lost command operation will not be performed If the communication is resumed
within the "communication command loss decision time" and the normal inverter
operation is restored (it will not be regarded as an error).
Communication status
Recognition of
command loss
Com
mand
loss
Com
mand
loss
Lost command
decision time
Lost command
decision time
