Initial Settings And Specifications Of Rs-485 Communication - Mitsubishi Electric FR-E700 Instruction Manual

Communication operation and setting
6.19.2 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, initialization of the
communication specifications must be made to the inverter. Data communication cannot be
made if the initial settings are not made or there is any setting error.
PU connector communication related parameter
Pr. No. Name
PU communication
117
station number
PU communication
118
speed
PU communication stop
119
bit length
PU communication
120
parity check
PU communication
123
waiting time setting
PU communication
124
CR/LF presence/absence
selection
549
Protocol selection
The above parameters can be set when Pr. 160 "User group read selection" = 0.
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.
6 - 226
Initial Setting
Description
Value Range
Specify the inverter station number.
Set the inverter station numbers
0–31
0 when two or more inverters are
(0–247)
connected to one personal compu-
ter.
Set the communication speed.
The setting value × 100 equals the
48/96/ communication speed.
192
192/384 For example, the communication
speed is 19200bps when the set-
ting value is "192".
Stop bit length
0 1bit
1 1 2bit
10 1bit
11 2bit
0 Without parity check
2 1 With odd parity check
2 With even parity check
Set the waiting time between data
0–150 ms transmission to the inverter and
9999
response.
9999 Set with communication data.
0 Without CR/LF
1 1 With CR
2 With CR/LF
Mitsubishi inverter (computer link
0
operation) protocol
0
1 Modbus-RTU protocol
Parameters referred to
Data length
8bit
7bit
Parameter
Refer to
Section
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