Appendix C
Memory Areas
574
Word(s)
Page
Function
Bit(s)
AR 14
00 to 15
Maximum Cycle Time
(4 digits BCD) (See note 1.)
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 units can be any of the following, depending on the setting of in DM 6618.
Default: 0.1 ms; “10 ms” setting: 0.1 ms; “100 ms” setting: 1 ms; “1 s” setting: 10 ms
537
AR 15
00 to 15
Current Cycle Time
(4 digits BCD) (See note 1.)
The most recent cycle time during operation is stored. The Current Cycle Time is not
cleared when operation stops.
The units can be any of the following, depending on the setting of in DM 6618.
Default: 0.1 ms; “10 ms” setting: 0.1 ms; “100 ms” setting: 1 ms; “1 s” setting: 10 ms
Note
1. The units will be as follows, depending on the unit setting for the cycle monitor time (DM 6618):
Initial status:
0.1-ms unit
When 10-ms unit is set:
0.1-ms unit
When 100-ms unit is set:
1-ms unit
When 1-s unit is set:
10-ms unit
2. Areas that cannot be used are cleared when the power is turned on.
3. The contents of AR 10 is backed up by the built-in capacitor. If power is left OFF for longer than the back-
up time, however, the contents may be cleared. For details regarding the backup time, refer to the
CPM1A
or
CPM1 Operation Manual
.
CPM2A/CPM2C Memory Areas
Memory Area Structure
The following memory areas can be used with the CPM2A/CPM2C. Refer to the
CPM2C-S Operation Manual
(W377) for information on CPM2C-S memory areas.
Data area
Words
Bits
Function
IR area
1
Input area
IR 000 to IR 009
(10 words)
IR 00000 to IR 00915
(160 bits)
These bits can be allocated to the external
I/O terminals.
Output area
IR 010 to IR 019
(10 words)
IR 01000 to IR 01915
(160 bits)
/O e
a s
Work area
IR 020 to IR 049
IR 200 to IR 227
(58 words)
IR 02000 to IR 04915
IR 20000 to IR 22715
(928 bits)
Work bits can be freely used within the pro-
gram.
SR area
SR 228 to SR 255
(28 words)
SR 22800 to SR 25515
(448 bits)
These bits serve specific functions such as
flags and control bits.
TR area
---
TR 0 to TR 7
(8 bits)
These bits are used to temporarily store
ON/OFF status at program branches.
HR area
2
HR 00 to HR 19
(20 words)
HR 0000 to HR 1915
(320 bits)
These bits store data and retain their ON/
OFF status when power is turned off.
AR area
2
AR 00 to AR 23
(24 words)
AR 0000 to AR 2315
(384 bits)
These bits serve specific functions such as
flags and control bits.
LR area
1
LR 00 to LR 15
(16 words)
LR 0000 to LR 1515
(256 bits)
Used for a 1:1 data link with another PC.
Timer/Counter area
2
TC 000 to TC 255 (timer/counter numbers)
3
The same numbers are used for both timers
and counters.
DM area
Read/write
2
DM 0000 to DM 1999
DM 2022 to DM 2047
(2,026 words)
---
DM area data can be accessed in word
units only. Word values are retained when
the power is turned off.
Error log
2
DM 2000 to DM 2021
(22 words)
---
Used to store the error code of errors that
occur. These words can be used as ordi-
nary read/write DM when the error log func-
tion isn’t being used.
Read-only
4
DM 6144 to DM 6599
(456 words)
---
Cannot be overwritten from program.
PC Setup
4
DM 6600 to DM 6655
(56 words)
---
Used to store various parameters that con-
trol PC operation.
