Chapter 5: CPU Operation and Memory
59
Address
Function
Detail
SR017
System error information Gives result of self-check by CPU. Indicates error content when
F0.0 turns On.
Watchdog time error
Undefined instruction
during run state
Peripheral device fault
Misc. faults
Logic circuit fault
Microcomputer fault
SR018
Location of undefined
instruction
Indicates the location of the instruction (the step number) that
caused an undefined instruction error during program execution.
SR019
Reserved
System use.
SR020
Multiplication
Stores high order 8 bit values upon executing 16 bit multiplication
instructions.
SR022
Remainder
Stores the remainder after a division instruction has been
executed (high order 16 bits).
SR024 to 27 Reserved
System use.
SR028 to 29 Error I/O module
Sets bit position at error in I/O module.
SR030 to
047
Reserved
System use.
SR048 to
111
Slot information
Stores slot information for I/O modules.
SR112 to
SR239
Remote
Contains remote I/O configuration data.
SR289 to
SR297
RTC
Contains real time clock information.
SR298 to
SR373
User defined comm.
protocol
User defined communication protocol information for COM2.
SR374 to
SR379
Link error
Link error information data.
SR380 to
SR511
Reserved
System use.
MSB
7
6
5
4
3
2
1
0
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