Alarm Detection; Alarm Detection; Alarm Codes, Causes, And Possible Solutions - Omron JZA User Manual

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
output (H2-01), 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 S5). Check external sequence and baseblock signal input timing.
LED Operator Display
CALL
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 communication cycle is longer than 2
seconds.
Incompatible PLC software settings or
there is a hardware problem.
Communications cable is disconnected or
damaged.
LED Operator Display
CrST
Cause
Fault reset was being executed when a run
command was entered.
LED Operator Display
Cause
Sequence error
SIEP C710606 33A OYMC AC Drive – J1000 User Manual
Table 6.8
Table 6.8 Alarm Codes, Causes, and Possible Solutions
Baseblock
bb
Drive output interrupted as indicated by an external baseblock signal.
Serial Communication Transmission Error
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 OYMC 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.
• 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.
Can Not Reset
• Ensure that a run command cannot be entered from the external terminals or option
unit during fault reset.
• Turn off the run command.
Forward/Reverse Run Command Input Error
EF
Both forward run and reverse run closed simultaneously for over 0.5 s.
Check the forward and reverse command sequence and correct the problem.
Note: When minor fault EF detected, motor ramps to stop.
for the appropriate action.
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions

6.5 Alarm Detection

Minor Fault
(H2-01 = 10)
No output
Minor Fault
(H2-01 = 10)
YES
YES
YES
YES
Minor Fault
(H2-01 = 10)
YES
YES
YES
YES
YES
Minor Fault
Output
(H2-01 = 10)
YES
Minor Fault
Output
(H2-01 = 10)
YES
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