Mitsubishi Electric FR-F800 Series Instruction Manual page 506

5.12.4 Initial settings and specifications of RS-485
Use the following parameters to perform required settings for RS-485 communication between the inverter and a personal
computer.
• Use the PU connector on the inverter or RS-485 terminals as communication interface.
• The Mitsubishi inverter protocol, MODBUS-RTU protocol, or BACnet protocol is used. Parameter setting, monitoring, etc.
can be performed through communication.
• 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 if there is any setting error.
 Parameters related to PU connector communication
Pr.
117 PU communication
N020 station number
118 PU communication
N021 speed
PU communication
N022
data length
PU communication
N023
stop bit length
PU communication
119 stop bit length / data
length
120 PU communication
N024 parity check
121 PU communication
N025 retry count
122 PU communication
N026 check time interval
123 PU communication
N027 waiting time setting
124 PU communication CR/
N028 LF selection
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communication
Name Initial value
0
192
0
1
1
2
1
9999
9999
1
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Setting
range
Use this parameter to specify the inverter station number.
0 to 31 Enter the inverter station numbers when two or more inverters are
connected to one personal computer.
48, 96, 192, Select the communication speed.
384, 576, The setting value × 100 equals the communication speed.
768, 1152 For example, enter 192 to set the communication speed of 19200 bps.
0 Data length 8 bits
1 Data length 7 bits
0 Stop bit length 1 bit
1 Stop bit length 2 bits
0 Stop bit length 1 bit
1 Stop bit length 2 bits
10 Stop bit length 1 bit
11 Stop bit length 2 bits
0 Parity check disabled.
1 Parity check (odd parity) enabled.
2 Parity check (even parity) enabled.
Set the permissible number of retries for unsuccessful data reception.
0 to 10 If the number of consecutive errors exceeds the permissible value, the
inverter output will be stopped.
The inverter output will not be shut off even when a communication
9999
error occurs.
0 PU connector communication is disabled.
Set the interval of the communication check (Signal loss detection)
time.
0.1 to 999.8 s
If a no-communication state persists for longer than the permissible
time, the inverter output will be shut off.
9999 No communication check (Signal loss detection)
Set the time delay between data transmission to the converter and the
0 to 150 ms
response.
The time delay is not set in this parameter but in communication data.
9999
Delay time: Number set in the data × 10 ms
0 Without CR/LF
1 With CR
2 With CR/LF
Description
Data length 8 bits
Data length 7 bits
5. PARAMETERS
5.12 (N) Communication operation parameters
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2
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5
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7
8
9
10
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