Led Indicator Details - YASKAWA MP2200 User Manual

5.1.4 LED Indicator Details

The MP2200 performs a variety of diagnostics at startup. If an error is found, the ERR LED indicator blinks red. The
number of times the indicators blink differs depending on the error details, so error details can be determined from
counting the number of blinks.The following table shows details of MP2200 LED indicator.
Note: 1. MPE720 cannot be operated when the indicators are blinking.
2. For information on errors and countermeasures, refer to Chapter 8 Maintenance, Inspection, and
Troubleshooting.
LED Indicator Name
Type
RDY RUN ALM
Not lit Not lit Lit
Not lit Not lit Not lit
Not lit Lit Not lit
Lit Not lit Not lit
Lit Lit Not lit
Not lit Not lit Not lit
Not lit Not lit Not lit Blinking
Not lit Not lit Blinking Blinking
− − −
Lit Not lit Lit
ERR BAT
Lit Not lit
Hardware reset status
Not lit Not lit
Initializing
Not lit Not lit
Executing DWG.A
User program stopped
Not lit Not lit
(Offline stop mode)
User program executing normally
Not lit Not lit
(Online operation mode)
Lit Not lit
Major damage has occurred
(Software error)
No. of blinks
3: Address error (read) exception
4: Address error (write) exception
5: FPU exception
6: Illegal general command error
7: Illegal slot command error
Not lit
8: General FPU inhibited error
9: Slot FPU inhibited error
10: TLB duplicated bit error
11: TLB mistake error (read)
12: TLB mistake error (write)
13: TLB protection violation error (read)
14: TLB protection violation error (write)
15: Initial page write error
(Hardware errors)
No. of blinks
2: RAM diagnosis error
Not lit
3: ROM diagnosis error
4: CPU function diagnosis error
5: FPU function diagnosis error
−
Lit
Battery alarm
Operation error
Not lit Not lit
I/O error
5.1 Startup Sequence and Basic Operation
Indicator Details
5.1.4 LED Indicator Details
Remarks
−
User program stops when the DIP
switch or MPE720 is used to exe-
cute the STOP operation.
−
The ERR LED indicator is lit red
when the CPU is down.
The ERR LED indicator will blink
red when an exception error has
occurred.
The ALM and ERR LED indicators
will blink red if there is a self-diag-
nosis failure.
The BAT LED indicator will be lit
when the battery voltage drops.
The ALM LED indicator will be lit
red when an operation or I/O error is
detected.
5
5-5