177
Selection of operation mode and operation location
4.16.6 Start command source and speed command source during communication
operation (Pr. 338, Pr. 339, Pr. 551)
(1) Selects the command source of the PU operation mode
(Pr. 551)
Any of the operation panel, PU connector can be specified as the command source in the PU operation mode.
In the PU operation mode, set
Pr. 551
to "2" when executing parameter write, start command or speed command during
the RS-485 communication with PU connector.
PU...PU operation mode, NET...Network operation mode, —...without command source
The MODBUS RTU protocol cannot be used in the PU operation mode. When using the MODBUS RTU protocol, set
Pr. 551
"2".
When
Pr. 551
= "9999", the priorities of the PU control source is parameter unit (FR-PU07)
operation panel.
When the RS-485 communication with the PU connector is used, the external start command and speed command can
be valid. Command source in the PU operation mode can be selected.
From the communication device, parameter unit, etc. which have command source, parameter write or start command
can be executed. Parameter read or monitoring can be performed in any operation mode.
Parameter
Number
Name
Initial
Value
Setting
Range
Description
338
Communication operation
command source
0
0
Start command source communication
1
Start command source external
339
Communication speed
command source
0
0
Speed command source communication
1
Speed command source external
2
Speed command source external (When there is no external input,
the speed command via communication is valid, and the speed
command from terminal 2 is invalid.)
551
PU mode operation
command source
selection
9999
2
PU connector is the command source when PU operation mode.
4
Operation panel is the command source when PU operation mode.
9999
Parameter unit automatic recognition
Normally, operation panel is the command source. When the
parameter unit is connected to the PU connector, PU is the
command source.
The above parameters can be set when
Pr. 160 Extended function display selection
= "0".
*
Pr. 551
is always write-enabled.
Pr. 551
Setting
Command Source
Remarks
Operation
panel
Parameter
unit
RS-485
communication
2
—
PU
PU
Switching to NET operation mode
disabled
4
PU
—
NET
9999
(initial value)
PU
PU
NET
NOTE
When performing the RS-485 communication with the PU connector when
Pr. 551
= "9999", PU mode command
source does not automatically change to the PU connector.
When
Pr. 551
= "2" (PU mode PU connector), the operation mode cannot be switched to the Network operation mode.
Changed setting value is valid when powering ON or resetting the drive unit.
The MODBUS RTU protocol cannot be used in the PU operation mode. Select Network operation mode (NET mode
command source).
All of the operation mode indicators (
) on the operation panel turn OFF when the command source is
not operation panel.
Содержание FR-D720-0.2K-G
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