Mitsubishi Electric FR-D720S SC EC, Инструкция по эксплуатации

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Communication operation and settings Parameter
6 - 198
6.18.2 Initial settings and specifications of RS485 communication
(Pr. 117 to Pr. 120, Pr. 123, Pr. 124, Pr. 549)
Used to perform required settings for RS485 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
The above parameters can be set when Pr. 160 = 0.
When "1" (Modbus-RTU protocol) is set in Pr. 549, the setting range within parantheses is
applied.
Pr. No. Name
Initial
Value
Setting
Range
Description Parameters referred to
Refer to
Section
117
PU communication
station number
0
0–31
(0–247)
Specify the inverter station number.
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
Set the communication speed.
The setting value × 100 equals the
communication speed.
For example, the communication
speed is 19200bps when the set-
ting value is "192".
119
PU communication stop
bit length
1
Stop bit length Data length
0 1bit
8bit
1 2bit
10 1bit
7bit
11 2bit
120
PU communication
parity check
2
0 Without parity check
1 With odd parity check
2 With even parity check
123
PU communication
waiting time setting
9999
0–150 ms
Set the waiting time between data
transmission to the inverter and
response.
9999 Set with communication data.
124
PU communication
CR/LF presence/absence
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
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.