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Error Handling Section 8-2
4. The timeout time has elapsed for the master.
If no error did occur the HLM_STATUS will have value 0. In case of a non-
zero value, any appropriate action such as a re-try or emergency stop needs
to be programmed in the user BASIC program.
8-2-2 Servo Driver Alarms
The Servo Driver Front Panel Display Area will display if an alarm is gener-
ated in the Servo Driver. The display will display an A.❏❏ number on screen.
Alarm Table The Servo Driver alarms related to the option boards such as the MCW151
are given in the following table. Refer to the OMNUC W-series user’s manual
(I531) for specific details on other alarms and how to resolve them.
Alarm Description
■ A.E0
A.E0: No MC Unit
Display and Outputs
Note OFF: Output transistor is OFF (alarm state). ON: Output transistor is ON.
Status and Remedy for Alarm
■ A.E1
A.E1: MC Unit Timeout
HLM_STATUS status bits
987 0
Endcode(case1orcase3)
Timeout error (case 4)
Command not recognized (case 2)
Display Error Description
A.
❏❏
See Servo Driver manual. -
A.E0 MC Unit Initiation Error No MC unit has been mounted.
A.E1 MC Unit Timeout Error No response from the MC Unit.
A.E2 WDC Error of MC Unit There is an error in the MC Unit
watchdog counter.
A.E7 MC Unit Detection Error No MC Unit has been mounted.
Alarm Outputs
Alarm Code Outputs ALM Output
ALO1 ALO2 ALO3
OFF ON ON OFF
Cause Remedy
A The MC Unit is defective. Replace the MC Unit
A
At power on
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