Diagnostics; Common Items - Mitsubishi Electric MELSEC FX Series User Manual

FX communication

12. Diagnostics

12.1 Common Items

1 ) Check the connection with the communication unit of the programmable controller and the
optional equipment. When the connection is unstable, communication cannot be corrected.
For the installation and connection method, refer to the manual of the communication unit of
the optional equipment.
2 ) Check whether the VRRD or VRSC instruction is the program.
If it is used, delete it, turn off the power of the programmable controller, then turn it on again.
3 ) Each setting of communication format (D8120), parameter of programmable controller by
FX-PCS/WIN-E, N:N network (D8173 to D8180) and parallel link (M8070,M8071) is suitable
for the usage or it checks. The communication is not correctly done if setting is not suitable
for the usage.
When each setting is changed, please turn off the power supply of the programmable
controller, and turn it on again.
4 ) When using FX -485ADP and FX-485ADP , the power supply must be supplied correctly.
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