YASKAWA Varispeed f7, Инструкция по эксплуатации

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7
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PID Feedback Reference Lost
A PID feedback reference loss was
detected (b5-12 = 2) and the PID feed-
back input was less than b5-13 (PID
feedback loss detection level) for
longer than the time set in b5-14 (PID
feedback loss detection time).
The settings in b5-13 and b5-14 aren’t
appropriate. Check the settings in b5-13 and
b5-14.
The wiring of the PID feedback circuit
is incorrect.
Fix the wiring.
External Fault input from Commu-
nications Option Board
-
Check the Communications
Option Board and communica-
tions signals.
External Fault (Input Terminal S3)
An "external fault" was input from a
multi-function input terminal (S3 to
S8).
• Reset external fault inputs to the
multi-function inputs.
• Remove the cause of the exter-
nal fault.
External Fault (Input Terminal S4)
External Fault (Input Terminal S5)
External Fault (Input Terminal S6)
External Fault (Input Terminal S7)
External Fault (Input Terminal S8)
Zero-Servo Fault
The rotation position moved during
zero-servo operation.
The torque limit is too small. Increase the limit.
The load torque is too large. Reduce the load torque.
- Check for signal noise.
Exceeded Allowable Number of
Speed Search Retrials
The speed search has been retried
more than the number of times set in
b3-19 (Number of speed search retri-
als). The settings in b3-17 and b3-18 aren’t
appropriate. Make sure that the settings in b3-
17 and b3-18 are appropriate.
Digital Operator Connection Fault
The connection to the Digital Operator
was broken during operation for a Run
Command from the Digital Operator.
-
Check the connection to the Digi-
tal Operator.
MEMOBUS Communications Error
A normal reception was not possible
for 2 s or longer after control data was
received once.
-
Check the communications
devices and communications sig-
nals.
Option Communications Error
A communications error was detected
during a Run Command or while set-
ting a frequency reference from a
Communications Option Board.
-
Check the communications
devices and communications sig-
nals.
SI-T Watchdog Error
Consistency error of received control
data
Synchronization error between master
controller and Inverter for control
data.
Check the communications tim-
ing such as communications cycle.
Refer to the instruction manual for
SI-T option board for details.
SI-F/G Option Board CPU Failure
SI-F/G Option Board operation failed.
Digital Operator connection is faulty.
Disconnect and then reconnect the
Digital Operator.
Inverter control circuit is faulty. Replace the Inverter.
Table 7.1 Fault Displays and Processing (Continued)
Display Meaning Probable Causes Corrective Actions