Troubleshooting; Checking Communication Status Based On Led Display; Checking Installation; Checking Sequence Program - Mitsubishi MELSEC iQ-F FX5 User Manual

Parameter No. Name
903 Speed setting No. 2 gain
904 Torque command No. 3 bias
905 Torque command No. 3 gain
917 No.1 terminal bias (speed)
918 No.1 terminal gain (speed)
919 No.1 terminal bias (torque/magnetic flux)
920 No.1 terminal gain (torque/magnetic
flux)
Specify inverter parameter number in (s2) ((s3) in IVBWR instruction) as show below.
• In the case of parameter number 0 to 999, write the parameter number as is.
• In the case of parameter number 1000 to 9999, write parameter number + 10000. (Example: When
parameter number is 1234, specify K11234)
5.9

Troubleshooting

This chapter explains troubleshooting and error codes.

Checking communication status based on LED display

Check the status of the LED display of [RD] and [SD] on the CPU module or the communication board/communication
adapter.
LED display status
RD
On
On
Off
Off
If signals are being sent and received normally for inverter communication, both LEDs flash brightly.
If they do not flash, check the wiring and the communication settings.

Checking installation

• Connection status
The communication cannot be operated if the PLC and the communication board/communication adapter are not connected
correctly.
For the connection procedure, refer to the following.
MELSEC iQ-F FX5U User's Manual (Hardware)
MELSEC iQ-F FX5UC User's Manual (Hardware)
• Wiring
Verify that all communication equipment is correctly wired. (Page 100 Wiring)

Checking sequence program

A serial port using any other communication (such as RS2 instruction) cannot use an inverter communication instruction.
(Page 236 Combined Use of Serial Communication)
Second parameter specification code
Offset/Gain (H00)
903
904
905
917
918
919
920
SD
On
Off
On
Off
Analog (H01)
1903
1904
1905
1917
1918
1919
1920
Operation status
Data is being transmitted and received.
Data is being received but not being transmitted.
Data is being transmitted but not being received.
Data is neither being transmitted nor being received.
5 INVERTER COMMUNICATION
Analog value of
terminal (H02)
2903
2904
2905
2917
2918
2919
2920
143
5.9 Troubleshooting
5