About the 8020-SCP-521
8020-SCP-521 is a Model 500, 2K Processor with RAM. This unit is manufactured by Square D.
There are 55 error codes on this processor.
Error code 34 means that there is a parity error, a security jumper error, or a Read after Write error.
Error code 35 indicates that the tape cartridge is missing or is not seated properly.
Error code 36 means that on the current rung, replace rung operations are not allowed.
Error code 37 means that the user has attempted to Skip or Read a file when already past the last file on the tape. Error code 38 is unused.
Error code 39 means that an alarm has already been set within the D-LOG module. Error code 40 is unused.
Error code 41 means that there is an illegal register Write. Error code 42 is unused.
Error code 43 means that an illegal operation has been attempted. Error code 44 is unused.
Error code 45 means that the user has requested an operation that is not allowed because the D-LOG module tape operation is in progress. Error code 46 is unused.
Error code 47 indicates that, due to the key switch position, an operation is not allowed.
Error code 48 means that programming of an MCR in a subroutine area is not allowed.
Error code 49 means that an I/O, Register, or Channel is safeguarded.
Error code 50 means that forcing is active, so rack addressing is not alterable.
Error code 51 means that a module is improperly seated or missing, or that no rack address is assigned to the module, or that the address exceeds the capability of the processor. Error code 52 is unused.
Error code 53 means that the tape format is illegal.
Error code 54 means that the MARK number is illegal.
Error code 55 means that the tape operation has been aborted and the operation must be retried.
