Yaskawa MP940 - Manual (Page 349)

Troubleshooting
9.1.3 Indicator Errors
9-4
„ LED Indicator Details
The following describes details and remedies for indicators showing operating status and
errors in the MP940.
Classifi-
cation
Indicator Name
Indicator Details Remedy
RDY RUN ALM BAT
Normal Unlit Unlit Lit Unlit Hardware reset status Normally the CPU activates within a second. If this sta-
tus continues for more than a second, the problem is a
user program error or hardware failure.
Troubleshoot system errors.
Unlit Unlit Unlit Unlit Initializing
Lit Unlit Unlit Unlit User program stopped (Offline
Stop Mode) This status will occur if a program is stopped from the
CP-717 or by turning OFF the RUN switch.
Lit Lit Unlit Unlit User program executing nor-
mally This status will occur during normal operation.
Error Unlit Lit Lit Unlit Serious failure has occurred See 9.2.2 Processing Flow When a System Error
Occurs.
Lit Unlit Lit Unlit • Program memory initialization
incomplete
• Improper scan time setting
• Clear program memory from the System Definition
Screen on the CP-717.
• If this does not restore the system, then hardware has
probably failed.
Unlit Unlit Flashing Unlit Hardware errors
No. of flashes
2: RAM diagnosis error
3: ROM diagnosis error
4: CPU function diagnosis error
5: FPU function diagnosis error Troubleshoot system errors.
Warning - - - Lit Battery alarm Replace the battery.
Lit Lit Lit Unlit Operation error Refer to User Operating Error Status.
I/O error Refer to System I/O Error Status.
Wrong interrupt occurs
System register warning
(no indicator display) CP-717 connection data See System Status in 9.2.4 System Register Configura-
tion.
Hardware status (power interrup-
tion, RUN/STOP, Test Mode,
etc.) See System Status in 9.2.4 System Register Configura-
tion.