Omron SYSMAC CV Series Operation Manual page 588

Data Areas
Dedicated Bits
Some of the bits in the CPU Bus Link Area and most of the bits in the Auxiliary Area and are dedicated for
specific purposes. These are summarized in the following tables. Refer to 3-5 CPU Bus Link Area and 3-6
Auxiliary Area for details.
CPU Bus Link Area
Most CPU Bus Link Area bits are in the Data Link Area, used to transfer information between the CPU and
CPU Bus Units, but G000 contains flags and control bits relating to PC status and G001 to G004 is the Clock/
Calendar Area.
Word(s) Bit(s)
G000 00
01
02
03
04
05
06
07
08 to 10
11
12
13 and 14
15
G 001 00 to 07
08 to 15
G 002 00 to 07
08 to 15
G 003 00 to 07
08 to 15
G 004 00 to 07
578
ON when the PC is in PROGRAM mode.
ON when the PC is in Debug mode.
ON when the PC is in MONITOR mode.
ON when the PC is in RUN mode.
ON when the program is being executed.
Not used.
ON when a non-fatal error has occured. (PC operation continues.)
ON when a fatal error has occured. (PC stops.)
Not used.
UM Protect Bit. Prevents both reading out and writing to Program Memory when turned ON.
Set with the CVSS.
Memory Card Protect Bit. Prevents writing to Memory Card when turned ON. Set with the
Memory Card Protect Switch.
Not used.
UM Protect Bit. Prevents writing to Program Memory when turned ON. Set with the System
Protect Key Switch.
Seconds (00 to 59)
Minutes (00 to 59)
Hours (00 to 23)
Day of month (01 to 31)
Month (1 to 12)
Year (00 to 99)
Day of week (00 to 06, 00 = Sun.)
Function
Appendix D