Yaskawa MP900 Series Ladder Programming Manual - Manual (Page 366)

7.2 Indicator Status
7-3
T
roubleshooting
7
7.2 Indicator Status
The pattern of the indicators on the MP2000-series Machine Controller shows the operating status. The following table
gives the indicator lighting patterns and corresponding corrective actions.
Class
Indicator Status
Meaning Corrective Action
RDY RUN ALM ERR BAT
Normal
Not
lit.
Not
lit.
Lit. Lit.
Not
lit.
Hardware has been reset.
Normally, the CPU Unit will start within
10 seconds. If more than 10 seconds is
required, there is an error in a user pro-
gram or a hardware failure.
Not
lit.
Not
lit.
Not
lit.
Not
lit.
Not
lit.
The Machine Controller is being initial-
ized.
Not
lit.
Lit.
Not
lit.
Not
lit.
Not
lit.
Drawing A is being executed.
Lit.
Not
lit.
Not
lit.
Not
lit.
Not
lit.
The user program is stopped.
(The Machine Controller is in Offline
Stopped Mode.)
This status is entered at the following
times. It does not represent an error.
• The stop operation was performed from
the MPE720.
• The STOP switch was turned ON.
Lit. Lit.
Not
lit.
Not
lit.
Not
lit.
The user programs are being executed
normally.
Normal operation is in progress.
Er
ror
Not
lit.
Not
lit.
Not
lit.
Lit.
Not
lit.
A serious failure, watchdog timer error,
or Module synchronization error has
occurred.
A hardware failure, watchdog timer error,
or Module synchronization error has
occurred.
Refer to 7.3 Problem Classifications.
Not
lit.
Not
lit.
Not
lit.
Flash-
ing.
Not
lit.
A software error occurred.
Number of Flashes
3: Read address error exception
3: Write address error exception
5: FPU exception
6: General illegal instruction exception
7: Slot illegal instruction exception
8: General FPU suppression exception
9: Slot FPU suppression exception
10: TLB multibit exception
11: LTB reading error exception
12: LTB writing error exception
13: LTB read protection violation
exception
14: LTB write protection violation
exception
15: Initial page write exception
A system error occurred.
Refer to 7.4.5 System Errors.
Not
lit.
Not
lit.
Flash
ing.
Flash-
ing.
Not
lit.
A hardware error occurred.
Number of Flashes
2: RAM diagnostic error
3: ROM diagnostic error
4: CPU Function Module diagnostic
error
5: FPU Function Module diagnostic
error
A hardware failure has occurred. Replace
the Module.
Al
arm
− − − − Lit. Battery alarm Replace the Battery.
Lit. Lit. Lit.
Not
lit.
Not
lit.
An operation error occurred.
An I/O error occurred.
• Operation Errors
Refer to 7.4.1 Operation Errors.
• I/O Errors
Refer to 7.4.2 I/O Errors.