539
Memory Areas
Appendix C
AR 23
00 to 15
Power-off Counter
(4 digits BCD)
This is the count of the number of times that the power has been turned OFF. To clear the count,
write “0000” from a Programming Device.
AR 24
00
Power-up PC Setup Error Flag
Turns ON when there is an error in DM 6600 to DM 6614 (the part of the PC Setup area that is
read at power-up).
01
Startup PC Setup Error Flag
Turns ON when there is an error in DM 6615 to DM 6644 (the part of the PC Setup area that is
read at the beginning of operation).
02
RUN PC Setup Error Flag
Turns ON when there is an error in DM 6645 to DM 6655 (the part of the PC Setup area that is
always read).
03
CPU Unit Peripheral Port Settings Changing Flag
04
CPU Unit RS-232C Port Settings Changing Flag
05
Long Cycle Time Flag
Turns ON if the actual cycle time is longer than the cycle time set in DM 6619.
06, 07
Not used.
08 to 15
Code (2 digits hexadecimal) showing the word number of a detected I/O bus error
00 to 15 (BCD): Correspond to input words 000 to 015.
80 to 95 (BCD): Correspond to output words 100 to 115.
F0 (hexadecimal): Inner Board mounted in slot 1 cannot be identified.
F1 (hexadecimal): Inner Board mounted in slot 2 cannot be identified.
FF (hexadecimal): End cover cannot be identified.
AR 25
00 to 07
Not used.
08
FPD(––) Teaching Bit
09 to 11
Not used.
12
Trace Completed Flag
13
Tracing Flag
14
Trace Trigger Bit
15
Sampling Start Bit
(Do not overwrite this bit from the program.)
AR 26
00 to 15
Maximum Cycle Time
(4 digits BCD)
The longest cycle time since the beginning of operation is stored. It is cleared at the beginning,
and not at the end, of operation.
The unit can be any of the following, depending on the setting of the 9F monitoring time
(DM 6618). Default: 0.1 ms; “10 ms” setting: 0.1 ms; “100 ms” setting: 1 ms; “1 s” setting: 10 ms
AR 27
00 to 15
Current Cycle Time
(4 digits BCD)
The most recent cycle time during operation is stored. The Current Cycle Time is not cleared
when operation stops.
The unit can be any of the following, depending on the setting of the 9F monitoring time
(DM 6618). Default: 0.1 ms; “10 ms” setting: 0.1 ms; “100 ms” setting: 1 ms; “1 s” setting: 10 ms
Word
Bit(s)
Function
