Yaskawa MP920 User's Manual Design - Manual (Page 515)

12.3 Motion Errors
12-25
12
„ Alarm Indicator Displays
When an error or alarm occurs, refer to the following table.
Table 12.13 Alarm Indicator Displays
Display Meaning Remedy
or ,
followed by
error code
Serious fault (operation stop) A Motion Module hardware error has occurred. Replace
the Module.
1. A watchdog timeout error may occur when the user
program processing time exceeds the scan time setting.
Check the user program and the scan time setting.
2. A synchronization error indicates a problem with syn-
chronization between the PLC (CPU1/CPU2) and a
Servo Module. Check other Modules. If they are nor-
mal, replace racks and Modules one at a time to isolate
the cause of the problem.
Note:The alarm displays shown here are applicable to
SVA-01A Modules, SVA-02A Modules, and PO-01
Modules
Axis 1 Alarm (SVRDY “ON”)
• Error fault
• Servo parameter setting error
Error (SVRDY “OFF”)
• Fixed servo parameter setting error
• Absolute Encoder interface error
Check the contents of IW††00 + the axis offset to deter-
mine which of the items shown on the left is the cause of
the problem.
• A Servo parameter setting error indicates that any of the
values specified in the Servo parameters are outside the
allowable range. Check the Servo parameter settings,
and correct them as necessary.
• A fixed servo parameter setting error indicates that any
of the values specified in the fixed servo parameters are
outside the allowable range. Check the fixed servo
parameter settings, and correct them as necessary.
• For an Absolute Encoder interface error, initialize the
Absolute Encoder.
Axis 2
Axis 3
Axis 4
Other CPU operation stop Some other Module is stopped. Check other Modules. For
example, check whether the PLC (CPU1/CPU2) is
stopped.
Absolute position read retry status A retry has occurred for absolute positioning read process-
ing during initialization because the power has been turned
ON or the Module has been reset while the fixed parameter
encoder selection is set for an absolute value encoder.
: Watchdog timeout
: Synchronization error
: ROM diagnostic error
: RAM diagnostic error
: Shared memory diagnostic error
: Built-in CPU timer diagnostic error
: Timer diagnostic error
: NVRAM read error
: NVRAM write error
: Illegal general instruction interrupt
: Illegal slot instruction interrupt
: CPU address error interrupt
: DMA address error interrupt
: User break interrupt
: Trap instruction interrupt