Troubleshooting Alarms Related To The Hwbb Function - YASKAWA SERVOPACK Sigma 7W Series Product Manual

6.1.2

Troubleshooting Alarms Related to the HWBB Function

The following table describes troubleshooting alarms that are related to the HWBB function.
Contact your Yaskawa representative if you cannot solve a problem with the corrections given
in the table.
Alarm Number:
Alarm Name
A.Eb1:
Safety Function
Signal Input Tim-
ing Error
A.EC8:
Gate Drive Error 1
(An error
occurred in the
gate drive circuit.) A failure occurred in
A.EC9:
Gate Drive Error 2
(An error
occurred in the
gate drive circuit.)
Possible Cause
The delay between
activation of the
/HWBB1 and Measure the time delay
/HWBB2 input sig- between the /HWBB1
nals for the HWBB and /HWBB2 signals.
function was ten sec-
ond or longer.
A failure occurred in
–
the SERVOPACK.
–
the SERVOPACK.

6.1.2 Troubleshooting Alarms Related to the HWBB Function

Confirmation
The output signal circuits
or devices for /HWBB1
and /HWBB2 or the SER-
VOPACK input signal cir-
cuits may be faulty.
Alternatively, the input sig-
nal cables may be discon-
nected. Check to see if
any of these items are
faulty or have been dis-
connected.
Replace the SERVO-
PACK.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
6.1 Alarm Displays
Correction Reference
page 5-1
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6
6-3