(N) Operation via communication and its settings
Parameters
5 - 630
5.15.6
MODBUS RTU communication specification
Operation by MODBUS RTU communication or parameter setting is possible by using the MODBUS
RTU communication protocol from the RS-485 terminals of the inverter.
Pr.
Name
Initial
value
Setting
range
Description
331
N030
RS-485 communication
station number
0
0
Broadcast communication
1 to 247
Inverter station number specification
Set the inverter station numbers when two or more
inverters are connected to one personal computer.
332
N031
RS-485 communication
speed
96
3, 6, 12, 24,
48, 96, 192,
384, 576,
768, 1152
Set the communication speed.
The setting value × 100 equals the communication
speed.
For example, if 96 is set, the communication speed is
9600 bps.
334
N034
RS-485 communication
parity check selection
2
0
Without parity check
Stop bit length 2 bits
1
With parity check at odd numbers
Stop bit length 1 bit
2
With parity check at even numbers
Stop bit length 1 bit
343
N080
Communication error
count
0
⎯
Displays the communication error count during
MODBUS RTU communication. Read-only.
539
N002
MODBUS RTU
communication check
time interval
9999
0
MODBUS RTU communication, but the inverter trips
in the NET operation mode.
0.1 to 999.8 s
Set the interval of the communication check (signal
loss detection) time. (same specifications as Pr. 122)
9999
No communication check (signal loss detection)
549
N000
Protocol selection
0
0
Mitsubishi inverter protocol (computer link)
1
MODBUS RTU protocol
NOTES
To use the MODBUS RTU protocol, set "1" to Pr. 549 "Protocol selection".
If MODBUS RTU communication is performed from the master to the address 0 (station number 0),
the data is broadcasted, and the inverter does not send any reply to the master. To obtain replies
from the inverter, set Pr. 331 "RS-485 communication station number"
≠
"0 (initial value)". Some
functions are disabled in broadcast communication. (Refer to page 5-633.)
If a communication option is mounted with Pr. 550 "NET mode operation command source selec-
tion" = "9999 (initial value)", commands (operation commands) transmitted via RS-485 terminals
become invalid. (Refer to page 5-274.)
Summary of Contents for FR-A800
Page 2: ......
Page 4: ......
Page 22: ...Contents XVIII ...
Page 30: ...Related manuals Introduction 1 8 ...
Page 122: ...Connection of stand alone option units Installation and wiring 2 92 ...
Page 180: ...Basic operation procedure JOG operation Basic operation 4 32 ...
Page 934: ...Check first when you have a trouble Protective functions 6 46 ...
Page 1031: ...Appendix EC Declarations of Conformity FR A800 A 47 ...
Page 1032: ...EC Declarations of Conformity Appendix A 48 ...
Page 1033: ...Appendix EC Declarations of Conformity FR A800 A 49 ...
Page 1034: ...EC Declarations of Conformity Appendix A 50 ...
Page 1035: ...Appendix EC Declarations of Conformity FR A800 A 51 A 5 2 EMC Directive ...
Page 1036: ...EC Declarations of Conformity Appendix A 52 ...
Page 1037: ...Appendix EC Declarations of Conformity FR A800 A 53 ...
Page 1038: ...EC Declarations of Conformity Appendix A 54 ...
Page 1039: ...Appendix EC Declarations of Conformity FR A800 A 55 ...
Page 1040: ...EC Declarations of Conformity Appendix A 56 ...
Page 1041: ......