Yaskawa BACnet MS/TP - Manual (Page 28)

Digital Operator Display Fault Name
oFC02
Option Card Fault at Option Port CN5-C
Same type of option card is currently connected
Cause Possible Solution
An option card of the same type is
already installed in option port
CN5-A or CN5-B.
Except for PG options, only one of each option card type can only be installed
simultaneously. Make sure only one type of option card is connected.
An input option card is already
installed in option port CN5-A or
CN5-B.
Install a communication option, a digital input option, or an analog input option.
More than one of the same type of card cannot be installed simultaneously.
Three PG option boards are
installed.
A maximum of two PG option boards can be used simultaneously. Remove the
PG option board installed into option port CN5-A.
n Minor Faults and Alarms
Digital Operator Display Minor Fault Name
CALL
Serial Communication Transmission Error
Communication has not yet been established.
Cause Possible Solutions
Communications wiring is
faulty, there is a short circuit, the
wiring is incorrect , or the
connections are poor.
• Check for wiring errors.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
Programming error on the master
side.
Check communications at start-up and correct programming errors.
Communications circuitry is
damaged.
• Perform a self-diagnostics check.
• If the problem continues, replace either the control board or the entire drive. For
instructions on replacing the control board, contact Yaskawa or your nearest sales
representative.
Termination resistor setting is
incorrect.
Install a termination resistor at both ends of a communication line. Set the internal
termination resistor switch correctly on slave drives. Place DIP switch S1 to the ON
position.
7 Troubleshooting
28 YASKAWA TOEP YEACOM 08A A1000 Option BACnet MS/TP SI-B3 Installation & Technical Manual