Справочник Пользователя для Mitsubishi Electronics FR-D740-012
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Communication operation and setting
4.19.2 Initial settings and specifications of RS-485 communication
(Pr. 117 to Pr. 120, Pr. 123, Pr. 124, Pr. 549)
Used to perform required settings for RS-485 communication between the inverter and personal computer.
Use PU connector of the inverter for communication.
You can perform parameter setting, monitoring, etc. using Mitsubishi inverter protocol or Modbus-RTU protocol.
To make communication between the personal computer and inverter, setting of the communication specifications
must be made to the inverter in advance.
Data communication cannot be made if the initial settings are not made or there is any setting error.
You can perform parameter setting, monitoring, etc. using Mitsubishi inverter protocol or Modbus-RTU protocol.
To make communication between the personal computer and inverter, setting of the communication specifications
must be made to the inverter in advance.
Data communication cannot be made if the initial settings are not made or there is any setting error.
Parameter
Number
Name
Initial
Value
Value
Setting Range
Description
117
PU communication
station number
station number
0
0 to 31 (0 to 247)
Inverter station number specification
Set the inverter station numbers when two or more
inverters are connected to one personal computer.
Set the inverter station numbers when two or more
inverters are connected to one personal computer.
118
PU communication speed
192
48, 96, 192, 384
Communication speed
The setting value X 100 equals to the
communication speed.
Example)19200bps if 192
The setting value X 100 equals to the
communication speed.
Example)19200bps if 192
119
PU communication stop
bit length
bit length
1
Stop bit length
Data length
0
1bit
8bit
1
2bit
10
1bit
7bit
11
2bit
120
PU communication parity
check
check
2
0
Without parity check
1
With odd parity check
2
With even parity check
123
PU communication
waiting time setting
waiting time setting
9999
0 to 150ms
Set the waiting time between data transmission to
the inverter and response.
the inverter and response.
9999
Set with communication data.
124
PU communication CR/LF
selection
selection
1
0
Without CR/LF
1
With CR
2
With CR/LF
549
Protocol selection
0
0
Mitsubishi inverter (computer link operation) protocol
1
Modbus-RTU protocol
The above parameters can be set when Pr. 160 Extended function display selection = "0". (Refer to page 162)
∗1
When "1" (Modbus-RTU protocol) is set in Pr. 549, the setting range within parenthesis is applied.
NOTE
Always reset the inverter after making the initial settings of the parameters. After you have changed the
communication-related parameters, communication cannot be made until the inverter is reset.
communication-related parameters, communication cannot be made until the inverter is reset.