Minor Faults And Alarms; Explicit Message Communications Errors - YASKAWA SI-N3 Technical Manual

12 Troubleshooting
• Is the option properly installed?
• Is the communication line properly connected to the option? Is it loose?
• Is the PLC program working? Is the controller/PLC CPU stopped?
• Did a momentary power loss interrupt communications?
Code Name
bUS Option Communication Error
EF0 Option Card External Fault
oFA00 Option Not Compatible with Port
oFA01 Option Card Fault (CN5-A)
oFA03, oFA04 Option Card Error (CN5-A)
oFA30 to Option Card Connection Error
oFA43 (CN5-A)
oFb00 Option Not Compatible with Port
oFb02 Option Fault
oFC00 Option Fault (CN5-B)
oFC02 Option Fault
■

Minor Faults and Alarms

Code Name
CyPo Cycle Power to Active Parameters
◆

Explicit Message Communications Errors

When there is a problem with a request message sent from the master in explicit communications, the drive will
return a response message with a service code of "94" and an error code from the following table as the data.
94
Causes
The drive did not receive a signal from the
controller.
The communications cable wiring is incorrect.
An existing short circuit or communications
disconnection
A data error occurred due to electric interference
Option is damaged
Connection Time-out
Duplicate MAC ID
The option received an external fault from the
controller.
A programming error occurred on the controller
side.
The option connected to connector CN5-A is not
compatible.
The option connected to option port CN5-A was
changed during run.
A fault occurred in the option.
A fault occurred in the option.
The option connected to connector CN5-B is not
compatible.
An option of the same type is already installed in
option port CN5-A, CN5-B, or CN5-C.
The option connected to connector CN5-C is not
compatible.
An option of the same type is already installed in
option port CN5-A, CN5-B, or CN5-C.
Causes
Comm. Option Parameter Not Upgraded
Possible Solutions
• Check for wiring errors.
• Correct the wiring.
Check disconnected cables and short circuits and repair as needed
• Prevent noise in the control circuit, main circuit, and ground
wiring.
• If you identify a magnetic contactor as a source of noise,
install a surge absorber to the contactor coil.
• Use only recommended cables or other shielded line. Ground
the shield on the controller side or the drive input power side.
• Separate all communication wiring from drive power lines.
Install an EMC noise filter to the drive power supply input.
• Counteract noise in the master controller (PLC).
If there are no problems with the wiring and the error continues to
occur, replace the option.
• The option Requested Packet Interval (RPI) timer timed out •
Make sure that RPI time is set properly
The option MAC ID and at least one other node have the same
MAC ID. Check the setting values of F6-50 [DeviceNet MAC
Address].
1. Find the device that caused the external fault and remove the
caus.
2. Clear the external fault input from the controller.
Examine the operation of the controller program.
Connect the option to the correct connector.
• Use connector CN5-A when you connect the option.
To use other options, refer to those option manuals.
1. De-energize the drive.
2. Connect the option to the correct option port.
1. De-energize the drive.
2. Make sure that the option is correctly connected to the
connector.
3. If the problem continues, replace the option.
1. De-energize the drive.
2. Make sure that the option is correctly connected to the
connector.
3. If the problem continues, replace the option.
Connect the option to the correct connector.
• Use connector CN5-A when you connect the option.
To use other options, refer to those option manuals.
Connect the option to the correct option port.
Connect the option to the correct connector.
• Use connector CN5-A when you connect the option.
To use other options, refer to those option manuals.
Connect the option to the correct option port.
Possible Solutions
Re-energize the drive to update the communication option
parameters.
YASKAWA SIEP C730600 84F DeviceNet Technical Manual