Omron CPM1 Programming Manual

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CPM1/CPM1A Memory Area Functions Section 3-2
3-2-3 SR Area
These bits mainly serve as flags related to CPM1/CPM1A operation or con-
tain present and set values for various functions. For details on the various bit
functions, refer to relevant sections in this manual or to Appendix C Memory
Areas.
SR 244 to SR 247 can also be used as work bits, when input interrupts are
not used in Counter Mode.
3-2-4 TR Area
When a complex ladder diagram cannot be programmed in mnemonic code
just as it is, these bits are used to temporarily store ON/OFF execution condi-
tions at program branches. They are used only for mnemonic code. When
programming directly with ladder diagrams using the Ladder Support Soft-
ware (LSS) or the SYSMAC Support Software (SSS), TR bits are automati-
cally processed for you.
The same TR bits cannot be used more than once within the same instruction
block, but can be used again in different instruction blocks. The ON/OFF sta-
tus of TR bits cannot be monitored from a Peripheral Device.
Examples showing the use of TR bits in programming are provided on
page 173.
3-2-5 HR Area
These bits retain their ON/OFF status even after the CPM1/CPM1A power
supply has been turned off or when operation begins or stops. They are used
in the same way as work bits.
3-2-6 AR Area
These bits mainly serve as flags related to CPM1/CPM1A operation. These
bits retain their status even after the CPM1/CPM1A power supply has been
turned off or when operation begins or stops. For details on the various bit
functions, refer to relevant sections in this manual or to Appendix C Memory
Areas.
3-2-7 LR Area
When the CPM1/CPM1A is linked one-to-one with another CPM1/CPM1A, a
CQM1, an SRM1 or a C200HS PC, these bits are used to share data. For
details, refer to page 104.
LR bits can be used as work bits when not used for data links.
3-2-8 Timer/Counter Area
This area is used to manage timers and counters created with TIM, TIMH(15),
CNT, and CNTR(12). The same numbers are used for both timers and
counters and each number can be used only once in the user program. Do not
use the same TC number twice even for different instructions.
TC numbers are used to create timers and counters, as well as to access
Completion Flags and present values (PVs). If a TC number is designated for
word data, it will access the present value (PV); if it is used for bit data, it will
access the Completion Flag for the timer/counter.
Refer to instructions beginning on page 212 for details on timers and
counters.

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)