YASKAWA PROFIBUS-DP SI-P3 Technical Manual page 48

9 Troubleshooting

Minor Faults and Alarms
Keypad Display
Cause
The drive output is disabled.
"bb" is displayed on the keypad when the
drive is set for control by PROFIBUS-DP,
and a conventional data format is used,
and the operation command bit F is set to 1,
or a PPO type data format is used,
and the control word (STW) bit 3 is set to 0.
External baseblock signal was entered via one
of the multi-function input terminals (S1 to
S8).
Keypad Display
Cause
Communication wiring is faulty.
An existing short circuit or communications
disconnection
Programming error on the master side.
Communication circuitry is damaged.
Termination resistor of the MEMOBUS/
Modbus communications is not enabled.
Keypad Display
Cause
Although F6-15 = 1 [Comm. Option
Parameters Reload = Reload Now], the drive
did not update the communication option
parameters.
48
Baseblock
bb
Data format and setting contents do not match.
Set either of the bits depending on the data format used.
Check external sequence and baseblock signal input timing.
Serial communication transmission error
CALL
Communication is not established.
• Check for wiring errors.
• Correct the wiring.
Check disconnected cables and short circuits and repair as needed.
Check communications at start-up and correct programming errors.
• 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 a Yaskawa representative.
Set DIP switch S2 to the ON position to enable the termination
resistor on a drive located at the end of a network line.
Cycle Power to Active Parameters
CyPo
Comm. Option Parameter Not Upgraded
Re-energize the drive to update the communication option
parameters.
Note: If the option software version is not compatible or if you install
an incorrect option to the drive, it will trigger an alarm.
YASKAWA ELECTRIC SIEP C730600 82D YASKAWA AC Drive Option SI-P3 Technical Manual
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
Minor Fault
(H2- = 10)
No output
Minor Fault
(H2- = 10)
YES
Minor Fault
(H2- = 10)
YES