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PARAMETERS
Description of parameters
3.4.22 Initial settings and specifications of RS-485 communication (Pr. 117 to Pr. 124)
[Parameters related to PU connector communication]
This function is used to perform required settings for RS-485 communication between the converter and personal
computer.
Use PU connector of the converter for communication.
You can perform parameter setting, monitoring, etc. using Mitsubishi inverter protocol.
To make communication between a personal computer and a converter, initialization of the communication
specifications must be made to the converter.
Data communication cannot be made if the initial settings are not made or there is any setting error.
Parameter
Number
Name
Initial
Value
Setting Range Description
117 PU communication station number 0 0 to 31
Converter station number specification
Set the converter station numbers when two or more
converters 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, if 192 is set, the communication speed is
19200bps.
119 PU communication stop bit length 1
Stop bit length Data length
01bit
8 bits
12 bits
10 1bit
7 bits
11 2 bits
120 PU communication parity check 2
0 Without parity check
1 With parity check at odd numbers
2 With parity check at even numbers
121
Number of PU communication
retries
1
0 to 10
Set the permissible number of retries for unsuccessful
data reception. If it is still unsuccessful after the
permissible number of retries, the converter stops
retrying communication.
9999
The converter does not retry communication even when
the communication is unsuccessful.
123
PU communication waiting time
setting
9999
0 to 150ms
Set the waiting time between data transmission to the
converter and the response.
9999 Set with communication data.
124 PU communication CR/LF selection 1
0 Without CR/LF
1With CR
2With CR/LF
NOTE
Always reset the converter after making the initial settings of the parameters. After you change the communication-
related parameters, communication cannot be made until the converter is reset.
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