5.5 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 MA-MB-MC if H2-01 = 10 (H2-01 = E).
Investigate the cause of the alarm and refer to Table 5.7 for the appropriate action.
u
Alarm Codes, Causes, and Possible Solutions
Table 5.7 Alarm Codes, Causes, and Possible Solutions
LED Operator Display Minor Fault Name
bb
Baseblock
Drive output interrupted as indicated by an external baseblock signal.
Cause Possible Solutions
Minor Fault
(H2-01 = 10)
External baseblock signal
entered via multi-function input
terminal (S1 to S5).
Check external sequence and baseblock signal input timing. No output
LED Operator Display Minor Fault Name
CALL
Serial Communication Transmission Error
Communication has not yet been established.
Cause Possible Solutions
Minor Fault
(H2-01 = 10)
Communications wiring is
faulty, there is a short circuit, or
something is not connected
properly.
• Check for wiring errors.
• Correct the wiring.
• Remove and ground shorts and reconnect loose wires.
YES
Programming error on the
master side.
Check communications at start-up and correct programming
errors.
YES
Communications circuitry is
damaged.
• Perform a self-diagnostics check.
• Replace the drive if the fault continues to occurs.
YES
Terminal resistance setting is
incorrect.
The terminal slave drive must have the internal terminal resistance
switch set correctly. Place DIP switch S2 to the ON position.
YES
LED Operator Display Minor Fault Name
CE
MEMOBUS/Modbus Communication Error
Control data was not received correctly for two seconds.
5.5 Alarm Detection
134
YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
2/6/2008-14:44
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