Operation Command Source And Speed Command Source During Communication Operation (Pr. 338, Pr. 339, Pr. 550, Pr. 551) - Mitsubishi Electric F700 Instruction Manual

3.17.3 Operation command source and speed command source during
communication operation (Pr. 338, Pr. 339, Pr. 550, Pr. 551)
When the inverter RS-485 terminals or communication option is used, the external operation command and
speed command can be made valid. Also, the control command source in the PU operation mode can be
selected.
Parameter
Name
Number
Communication operation
338
command source
Communication speed
339
command source
NET mode operation
command source
550 *
selection
PU mode operation
command source
551 *
selection
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. (Refer to page 140.)
* Pr 550 and Pr. 551 are always write-enabled.
(1) Select the control source of the network operation mode (Pr. 550)
⋅ Either the inverter RS-485 terminals or communication option can be specified as the source of control in
network operation mode.
⋅ For example, set Pr. 550 to "1" when executing parameter write, start command or frequency setting from the inverter RS-
485 terminals in the network operation mode independently of whether the communication option is connected or not.
CAUTION
⋅ Since Pr. 550 = "9999" (Automatic recognition of the communication option) in the initial setting, parameter write, start
command and frequency setting cannot be executed by communication using the inverter RS-485 terminals when the
communication option is fitted. (Monitor and parameter read can be performed.)
(2) Select the control source of the PU operation mode (Pr. 551)
⋅ Either the PU connector or inverter RS-485 terminals can be specified as the source of control in the PU
operation mode.
⋅ In the PU operation mode, set Pr. 551 to "1" when executing parameter write, start command or frequency
setting through communication from the inverter RS-485 terminals.
CAUTION
⋅ The PU operation mode has a higher priority when Pr. 550 = "1" (NET mode RS-485 terminals) and Pr. 551 = "1" (PU mode RS-485
terminals). When the communication option is not fitted, therefore, the operation mode cannot be switched to network operation mode.
Pr. 550 Pr. 551
Setting Setting
1
0
2
(initial value)
1
1
2
(initial value)
1
9999
(initial value) 2
(initial value)
*1 The Modbs-RTU protocol cannot be used in the PU operation mode. When using the Modbus-RTU protocol, set Pr. 551 to "2".
*2 When the communication option is not fitted, the operation mode cannot be switched to network operation mode.
Initial Setting
Value Range
0
0
9999
9999
2
Operation Mode of Control Source
Inverter RS-485
PU connector
terminals
×
PU operation mode
PU operation mode
×
PU operation mode
PU operation mode NET operation mode
×
PU operation mode
PU operation mode
NET operation mode
Selection of operation mode and
0 Operation command source communication
1 Operation command source external
0 Speed command source communication
Speed command source external (Frequency setting from
1 communication is invalid, terminal 2 and 1 setting from
external is valid)
Speed command source external (Frequency setting from
2 communication is valid, terminal 2 and 1 setting from
external is invalid)
0 Communication option valid
1 Inverter RS-485 terminal valid
Automatic recognition of the communication option
Normally, the RS-485 terminals are valid. When the
communication option is fitted, the communication option is valid.
Select the inverter RS-485 terminals as the PU operation
1
mode control source.
Select the PU connector as the PU operation mode control
2
source.
Communication
option
NET operation mode
*1
×
NET operation mode
×
*1
×
NET operation mode
*1
×
NET operation mode
×
operation location
Description
Remarks
*2
*2
Switching to NET
operation mode disabled
*2
Communication option fitted
Communication option not fitted
Pr. 337
page 161
Pr. 340
page 150
Pr. 549
page 173
Pr. 555
page 214
3
151