Omron CPM1 Programming Manual

149
Using Memory Cassettes (CQM1 Only) Section 3-5
3-5 Using Memory Cassettes (CQM1 Only)
When the optional Memory Cassette is used, the PC Setup, user’s program,
fixed DM, and the instructions tabled can be placed in ROM. This prevents
unwanted changes from being accidentally written. In addition, when chang-
ing control processes, the settings and the program can be easily changed by
simply replacing the Memory Cassette.
This section explains how to read, write, and compare information to and from
the Memory Cassette.
3-5-1 Memory Cassettes and Contents
Memory Cassettes There are six types of Memory Cassette, as shown in the following table.
The following EEPROM chips (sold separately) are required for EPROM-type
Memory Cassettes.
For the CQM1 CPU Units, 8K words max. of information can be written to the
Memory Cassette. Therefore, any of the EPROM chips listed above would
have sufficient capacity, and the choice can be made strictly on the basis of
ease of purchase.
For instructions on using Memory Cassettes, refer to CQM1 Operation Man-
ual.
Contents The information that can be written to a Memory Cassette is shown in the fol-
lowing table.
The above information is cannot be read, written, or compared individually,
and must be treated as a single unit.
3-5-2 Memory Cassette Capacity and UM Area Size
A non-fatal error will occur if an attempt is made to transfer a program that is
too large. There are two cases in which this can occur.
1,2,3... 1. When a 4-KW EEPROM Memory Cassette is installed in a CQM1-CPU4@-
EV1 CPU Unit with a 7.2-KW UM area, programs up to 3.2 KW long can
Model Remarks
CQM1-ME04K EEPROM type (without clock) 4K words
CQM1-ME04R EEPROM type (with clock) 4K words
CQM1-MP08K EPROM type (without clock) 8K words
CQM1-MP08R EPROM type (with clock) 8K words
CQM1-ME08K EEPROM type (without clock) 8K words
CQM1-ME08R EEPROM type (with clock) 8K words
Model ROM version Capacity Access speed
ROM-ID-B 27128 or equivalent 8K words 150 ns
ROM-JD-B 27256 or equivalent 16K words 150 ns
ROM-KD-B 27512 or equivalent 32K words 150 ns
Information Contents
Fixed DM Fixed Data Memory cannot be written from the pro-
gram. The range is DM 6144 to DM 6568. These
words are available for the user.
PC Setup The PC Setup sets the operating parameters of the
CQM1 and it stored in DM 6600 to DM 6655.
Instructions Table The instructions table assigns expansion instruction to
function codes to enable using them in programming.
User Program Memory (UM) The UM area holds the user’s program.

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)