13 Troubleshooting
13.1.3 Indicator Errors
13-4
(2) Indicator Details
The following describes details and remedies for indicators showing operating status and errors in the MP2100/
MP2100M.
Classific
ation
Indicator
Indicator Details
Remedy
S1
(green)
S2
(green)
S2
(red)
S1
(red)
BAT
Normal
Not lit Not lit
Lit
Lit
Not lit Hardware reset status
Normally the CPU activates within
10 seconds from power ON. If this
status continues for longer than this,
the problem is a user program error
or hardware failure.
Troubleshoot system errors.
Not lit Not lit
Not lit
Not lit Not lit Initializing
Not lit
Lit
Not lit
Not lit Not lit Drawing A executing
Lit Not
lit Not
lit Not
lit Not
lit User program stopped
(Offline Stop Mode)
This status will occur for either of the
following.
• The program was stopped from the
MPE720.
• The RUN switch was turned OFF.
Lit Lit Not
lit
Not
lit
Not
lit
User program executing normally
This status will occur during normal
operation.
Error
Not lit Not lit
Not lit
Lit
Not lit Serious failure
Refer to
13.2.3 Processing Flow for
a Ladder Program Error.
Not lit Not lit
Not lit Blinking Not lit Number of blinks for software error:
3: Address error (read)
4: Address error (write)
5: FPU error
6: Illegal general command
7: Illegal slot command
8: General FPU inhibited error
9: Slot FPU inhibited error
10: TLB serious error bit
11: LTB mistake (read)
12: LTB mistake (write)
13: LTB protection violation (read)
14: LTB protection violation (write)
15: Initial page write error
Not lit Not lit Blinking Blinking Not lit Hardware errors
No. of flashes
2: RAM diagnosis error
3: ROM diagnosis error
4: CPU function diagnosis error
5: FPU function diagnosis error
A hardware error has occurred.
Replace the Module.
Alarm
-
-
-
-
Lit
Battery alarm
Replace the battery.
(Refer to
Chapter 12 Maintenance
and Inspection
.)
Lit Not
lit Lit Not
lit Not
lit Operation error
Refer to
13.2.4 System Register
Configuration.
Lit Not
lit Lit Not
lit Not
lit I/O error
Refer to
13.2.4 System Register
Configuration.