174
EM Area
Section 3-10
PC Setup
(DM 6600 to DM 6655)
The PC Setup contains all of the PC Setup settings except for the Serial
COmmunications Board settings (stored in DM 6550 to DM 6559). Make the
PC Setup settings from a Programming Device.
3-10 EM Area
The EM area can be used in CQM1H-CPU61 CPU Units only. EM data is
accessed in word units. Since only one bank of EM is available, bank specifi-
cation is not necessary.
EM area addresses range from EM 0000 to EM 6143. The area has no partic-
ular functions assigned to it and can be used freely. It can be read and written
from the program or Programming Devices.
3-11 Using Memory Cassettes
This section provides general information on Memory Cassette specifications
and explains how to read, write, and compare information in a Memory Cas-
sette. Refer to the
CQM1H Operation Manual
for details on installing the
Memory Cassette, write-protecting flash-memory or EEPROM Memory Cas-
settes, replacing EPROM chips, and changing the EPROM version switch set-
tings.
An optional Memory Cassette can be used to record the program, read-only
DM (DM 6144 to DM 6568), PC Setup (DM 6600 to DM 6655), and expansion
instruction assignments. Recording this data on a Memory Cassette prevents
the program and vital settings from being changed accidentally. In addition,
the settings and the program required for different control processes can be
easily changed by simply replacing the Memory Cassette.
The program can be written to the CPU Unit’s internal RAM to operate the
CQM1H without a Memory Cassette, but the CQM1H can operate even if the
CPU Unit’s battery fails when a Memory Cassette is used and it’s contents are
transferred at startup.
Clock Function
The CQM1H PCs can be equipped with a clock by installing a Memory Cas-
sette with a clock. There is an “R” at the end of the model number of Memory
Cassettes with a built-in clock. See
3-6-4 Using the Clock
for more details.
Compatibility Between
Different CPU Units
Data written to a Memory Cassette by a CQM1H CPU Unit cannot be read by
a CQM1 CPU Unit, but data written by a CQM1 CPU Unit can be read by a
CQM1H CPU Unit.
Data written to a Memory Cassette by a CQM1H-CPU61 can be read by
CQM1H-CPU51, CQM1H-CPU21, and CQM1H-CPU11 CPU Units, but the
program will not operate properly if EM area addresses have been used.
3-11-1 Memory Cassettes and Contents
Available Memory
Cassettes
The following Memory Cassettes are available.
Access from instructions
Access from Programming Devices
Read
Write
Read
Write
YES
No
YES
YES
Memory
Model
Specifications
EEPROM
(see note
2)
CQM1-ME04K
4 Kwords without clock
CQM1-ME04R
4 Kwords with clock
CQM1-ME08K
8 Kwords without clock
CQM1-ME08R
8 Kwords with clock
