Maintenance
and
Tr
oubleshooting
Maintenance
and
Tr
oubleshooting
8--3
Maintenance and Troubleshooting
DL105 PLC User Manual, 3rd Edition
The following table names the specific memory locations that correspond to certain
types of error messages.
Error Class
Error Category
Diagnostic
V-memory
User-Defined
Error code used with FAULT instruc-
tion
V7751
System Error
Fatal Error code
V7755
Major Error code
V7756
Minor Error code
V7757
Grammatical
Address where syntax error occurs
V7763
Error Code found during syntax check V7764
CPU Scan
Number of scans since last Program
to Run Mode transition
V7765
Current scan time (ms)
V7775
Minimum scan time (ms)
V7776
Maximum scan time (ms)
V7777
The special relay table also includes status indicators which can indicate errors. For
a more detailed description of each of these special relays refer to Appendix D.
CPU Status Relays
SP12
Terminal Run mode
SP16
Terminal Program mode
SP20
STOP instruction was executed
SP22
Interrupt enabled
System Monitoring Relays
SP40
Critical error
SP41
Non-critical error
SP44
Program memory error
SP50
Fault instruction was executed
SP51
Watchdog timeout
SP52
Syntax error
SP53
Cannot solve the logic
Accumulator Status Relays
SP60
Acc. is less than value
SP61
Acc. is equal to value
SP62
Acc. is greater than value
SP63
Acc. result is zero
SP64
Half borrow occurred
SP65
Borrow occurred
SP66
Half carry occurred
SP67
Carry occurred
SP70
Result is negative (sign)
SP71
Pointer reference error
SP73
Overflow
SP75
Data is not in BCD
SP76
Load zero
V-memory Error
Code Locations
Special Relays (SP)
Corresponding to
Error Codes
Содержание DL105
Страница 2: ...DL105 PLC User Manual Manual Number D1 USER M...
Страница 308: ...1B DL105 Error Codes In This Appendix Error Code Table...
Страница 314: ...1C Instruction Execution Times In This Appendix Introduction Instruction Execution Times...
Страница 324: ...1D Special Relays In This Appendix DL105 PLC Special Relays...
Страница 327: ...1E PLC Memory In This Appendix DL105 PLC Memory...
Страница 329: ...1F European Union Directives CE In This Appendix European Union EU Directives Basic EMC Installation Guidelines...