Omron CPM1 Programming Manual

469
Memory Areas Appendix C
CPM1/CPM1A Memory Areas
Memory Area Structure
The following memory areas can be used with the CPM1/CPM1A.
Note 1. IR and LR bits that are not used for their allocated functions can be used as work bits.
2. The contents of the HR area, Counter area, and read/write DM area are backed up by a capacitor. At
25
°C, the capacitor will back up memory for 20 days. Refer to 2-1-2 Characteristics in the CPM1 or
CPM1A Operation Manual for a graph showing the backup time vs. temperature.
3. When accessing a PV, TC numbers are used as word data; when accessing Completion Flags, they
are used as bit data.
4. Data in DM 6144 to DM 6655 cannot be overwritten from the program, but they can be changed from
a Peripheral Device.
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
21
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
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)
Work area IR 200 to IR 231
(32 words)
IR 20000 to IR 23115
(512 bits)
Work bits can be freely used within the pro-
gram.
SR area SR 232 to SR 255
(24 words)
SR 23200 to SR 25515
(384 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 15
(16 words)
AR 0000 to AR 1515
(256 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 127 (timer/counter numbers)
3
The same numbers are used for both timers
and counters.
DM area Read/write
2
DM 0000 to DM 0999
DM 1022 to DM 1023
(1,002 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 1000 to DM 1021
(22 words)
--- Used to store the error code of errors that
occur. These words can be used as ordinary
read/write DM when the error log function
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.
Word Bit(s) Function Page

Omron CPM1 Specifications

General

Model	CPM1
Manufacturer	Omron
Instruction Set	Basic and advanced instructions
Power Supply	100 to 240 VAC or 24 VDC
Communication	RS-232C
I/O Points	10, 20, 30, or 40 points depending on the model
Timers	Yes, multiple timers available
Counters	Yes, multiple counters available
Input Voltage	24V DC
Output Type	Relay or transistor
Number of I/O Points	10, 20, 30, 40
Communication Ports	RS-232C (optional)
Operating Temperature	0°C to 55°C
Storage Temperature	-20°C
Humidity	10% to 90% (non-condensing)
Dimensions	Varies depending on the model
Weight	Varies depending on the model
Program Memory	2048 steps (2K steps)