Maintenance
and Troubleshooting
9–5
Maintenance and Troubleshooting
The following table lists program syntax and runtime error codes. Error detection
occurs during a Program-to-Run mode transition, or when you use AUX 21 – Check
Program. The CPU will also turn on SP52 and store the error code in V7755.
Appendix B provides a more complete description of the error codes.
Error Code Description
E4** No Program in CPU
E401 Missing END statement
E402 Missing LBL
E403 HP Peripheral port time-out
E404 HP Peripheral port time-out
E405 HP Peripheral port time-out
E406 Missing IRT
E412 SBR / LBL >64
E421 Duplicate stage reference
E422 Duplicate SBR/LBL reference
E423 HP Peripheral port time-out
E431 Invalid ISG/SG address
E433 Invalid ISG / SG address
E434 Invalid RTC
E435 Invalid RT
E436 Invalid INT address
E437 Invalid IRTC
Error Code Description
E438 Invalid IRT address
E440 Invalid Data Address
E441 ACON/NCON
E451 Bad MLS/MLR
E453 Missing T/C
E454 Bad TMRA
E455 Bad CNT
E456 Bad SR
E461 Stack Overflow
E462 Stack Underflow
E463 Logic Error
E464 Missing Circuit
E471 Duplicate coil reference
E472 Duplicate TMR reference
E473 Duplicate CNT reference
E499 Print instruction
Program Error
Codes
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