
APPENDIX
B–62075E/04
C. ERROR CODE TABLE
394
(4)PMC–NB
Message STATUS LED Contents and solution
RAM ERROR <a> bbcc xxxx: yyyyyyyy: PC010
STATUS LED LJ or jL
The parity error occurs on the debugging RAM of PMC.
a : RAM which generates RAM parity.
B BASIC RAM
O OPTION RAM
S STATIC RAM
bb, cc : RAM PARITY information.
xxxx : Segment selector where system error occurred.
yyyyyyyy : Offset address where system error occurred.
ROM ERROR aaaaaaaa: PC020
STATUS LED lL
The parity error occurs in PMC system ROM.
aaaaaaaa : ROM parity information
DIVIDE ERROR xxxx: yyyyyyyy: PC040
STATUS LED lL
Division error occurs such as a divisor is 0 in the division instruction.
xxxx : Segment selector where system error occurred.
yyyyyyyy : Offset address where system error occurred.
BUS ERROR xxxx: yyyyyyyy: PC040
STATUS LED lL
The BUS error (access on illegal address).
xxxx : Segment selector where system error occurred.
yyyyyyyy : Offset address where system error occurred.
STACK FAULT xxxx: yyyyyyyy: PC040
STATUS LED lL
The stack exception such as the violation of the limit of the stack.
xxxx : Segment selector where system error occurred.
yyyyyyyy : Offset address where system error occurred.
GENERAL PROTECTION xxxx: yyyyyyyy:
PC040
STATUS LED lL
The general protection exception such as segment limit over was
generated.
xxxx : Segment selector where system error occurred.
yyyyyyyy : Offset address where system error occurred.
SLC ERROR aa (cc) : PC050
STATUS LED JL
The communication error occurred in the I/O Link.
aa, cc : I/O Link error information.
This error may occur by the following causes.
1. When I/O Unit–MODEL A is used, base1, 2 or 3 is not connected
though allocated.
2. The connection of cable is insufficient.
3. Defects of cable.
4. Defects of DI/DO units (I/O unit, Power Mate etc.)
5. Defects of PMC board (printed circuit board on host side where I/O
Link cable is connected.)
(solution)Investigate the cause of error.
1. Please confirm the allocation data (by “EDIT”→“MODULE” screen)
and compare with the actual connection.
2. Please confirm whether the cable is correctly connected.
If you cannot find the cause with the ways above, it may be the defect
of hardware.
Please investigate a defective place by the following methods.
3. Please confirm the specification of the cable referring to “FANUC I/O
Unit–MODEL B connecting manuals(B–62163E)”.
4. Exchange the interface module of I/O Unit, the cable and the PMC
board, etc. one by one and, confirm whether this error occurs again.
The communication may fail by the noise etc. when this error still oc-
curs after replacing all DI/DO units.
Please investigate the cause of noise.
STATUS LED (green) are LED1, LED2 on PMC–NB.
j : Off J : On lL : Blinking