205
Selection of operation mode and operation location
4.19.3 Start command source and frequency command source during communication
operation (Pr. 338, Pr. 339, Pr. 550, Pr. 551)
(1) Select the command source of the Network operation mode
(Pr. 550)
Either the RS-485 communication with the PU connector or communication option can be specified as the command
source in the Network operation mode.
For example, set
Pr. 550
to "2" when executing parameter write, start command or frequency command from the unit RS-
485 terminals in the Network operation mode independently of whether the communication option is connected or not.
When the RS-485 communication with the PU connector or communication option is used, the external start command
and frequency 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 executed 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
Frequency command source communication
1
Frequency command source external
2
Frequency command source external (Frequency command from
communication is valid, frequency command from terminal 2 is
invalid)
550
∗
NET mode operation
command source
selection
9999
0
The communication option is the command source when NET
operation mode.
2
PU connector is the command source when NET operation mode.
9999
Automatic communication option recognition
Normally, PU connector is the command source. When a
communication option is mounted, the communication option is the
command source.
551
∗
PU mode operation
command source
selection
9999
2
PU connector is the command source when PU operation mode.
3
USB connector is the command source when PU operation mode.
4
Operation panel is the command source when PU operation mode.
9999
USB automatic recognition
Normally, operation panel is the command source. When the
parameter unit is connected to the PU connector, PU is the
command source. When USB is connected, USB connector is the
command source.
The above parameters can be set when
Pr. 160 User group read selection
= "0". However, the parameters can be set whenever the communication option is
connected.
∗
This parameter can be changed during a stop in any operation mode.
NOTE
Since
Pr. 550
= "9999" (automatic communication option recognition) in the initial setting, parameter write, start
command and frequency command cannot be executed by communication using the unit RS-485 terminals when the
communication option is fitted.
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