Alarm Detection; Alarm Detection; Alarm Codes, Causes, And Possible Solutions - YASKAWA V1000 Series Technical Manual

6.5 Alarm Detection

6.5

Alarm Detection

Alarms are drive protection functions that do not operate the fault contact. The drive will return to original status when the cause of the alarm has been
removed.
During an alarm condition, the Digital Operator display flashes and an alarm output is generated at the multi-function outputs (H2-01 to H2-03), if
programmed.
Investigate the cause of the alarm and refer to
u

Alarm Codes, Causes, and Possible Solutions

LED Operator Display
Cause
External baseblock signal entered via multi-function
input terminal (S1 to S7).
LED Operator Display
Cause
Connection is broken or master controller stopped
communicating.
Option card is damaged.
The option card is not properly connected to the drive.
A data error occurred due to noise.
LED Operator Display
Cause
Communications wiring is faulty, there is a short circuit,
or something is not connected properly.
Programming error on the master side.
Communications circuitry is damaged.
Terminal resistance setting is incorrect.
LED Operator Display
Cause
A data error occurred due to noise.
Communication protocol is incompatible.
The CE detection time (H5-09) is set shorter than the time
required for a communication cycle to take place.
Incompatible PLC software settings or there is a hardware
problem.
Communications cable is disconnected or damaged.
LED Operator Display
238
Table 6.9
for the appropriate action.
Table 6.9 Alarm Codes, Causes, and Possible Solutions
Baseblock
bb
Drive output interrupted as indicated by an external baseblock signal.
Check external sequence and baseblock signal input timing.
Option Communication Error
bUS
• After initial communication was established, the connection was lost.
• Assign a run command frequency reference to the option card.
• Check for faulty wiring.
• Correct the wiring.
• Repair ground wiring or disconnected cables.
If there are no problems with the wiring and the fault continues to occur, replace the option card.
• The connector pins on the option card are not properly lined up with the connector pins on the drive.
• Reinstall the option card.
• Check options available to minimize the effects of noise.
• Take steps to counteract noise in the control circuit wiring, main circuit lines and ground wiring.
• Try to reduce noise on the controller side.
• Use surge absorbers on magnetic contactors or other equipment causing the disturbance.
• Use cables recommended by Yaskawa, or another type of shielded line. The shield should be grounded on the
controller side or on the drive input power side.
• All wiring for communications devices should be separated from drive input power lines. Install a noise filter to
the input side of the drive input power.
Serial Communication Transmission Error
CALL
Communication has not yet been established.
• Check for wiring errors.
• Correct the wiring.
• Remove and ground shorts and reconnect loose wires.
Check communications at start-up and correct programming errors.
• Perform a self-diagnostics check.
• Replace the drive if the fault continues to occurs.
The terminal slave drive must have the internal terminal resistance switch set correctly. Place DIP switch S2 to the
ON position.
MEMOBUS/Modbus Communication Error
CE
Control data was not received correctly for two seconds.
• Check options available to minimize the effects of noise.
• Counteract noise in the control circuit wiring, main circuit lines and ground wiring.
• Reduce noise on the controller side.
• Use surge absorbers on magnetic contactors or other equipment causing the disturbance.
• Use cables recommended by Yaskawa or another type of shielded line. The shield should be grounded on the
controller side or on the drive input power side.
• Separate all wiring for communications devices from drive input power lines. Install a noise filter to the input side
of the drive input power.
• Check the H5 parameter settings as well as the protocol setting in the controller.
• Ensure settings are compatible.
• Check the PLC.
• Change the software settings in the PLC.
• Set a longer CE detection time (H5-09).
• Check the PLC.
• Remove the cause of the error on the controller side.
• Check the connector for a signal through the cable.
• Replace the communications cable.
Speed Deviation (for Simple V/f with PG)
dEv
According to the pulse input (RP), the speed deviation is greater than the setting in F1-10 for a time longer than the setting in F1-11.
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
Minor Fault
(H2-oo = 10)
No output
Minor Fault
(H2-oo = 10)
YES
YES
YES
YES
Minor Fault
(H2-oo = 10)
YES
YES
YES
YES
Minor Fault
(H2-oo = 10)
YES
YES
YES
YES
YES