5-2
Section
I/O Allocation for CPM1/CPM1A/CPM2A PCs
313
5-1-3 CPM1/CPM1A/SRM1(-V2) Flash Memory
The following settings must be made to use the flash memory area for
CPM1/CPM1A/SRM1(-V2) PCs.
Writing Data
In order to write the contents of the UM area, the DM read-only area (DM 6144 to
DM 6599, and the PC Setup area (DM 6600 to DM 6655) to the flash memory,
either one of the following operations must be performed.
•
Switch the PC to either the MONITOR or PROGRAM mode.
•
Turn the power to the PC OFF and ON again.
Note SRM1-CO01/02 Capacitor Backup
If changes are made to the above memory areas, they are not written to the flash
memory, and the power is switched off for 20 days or more (at 25
°
C), the
changes (in RAM) will be lost. If this occurs, the unchanged contents will be read
from the flash memory when the PC is started again.
Changing Memory Areas
When operating the SRM1 for the first time after changes have been made to the
UM area, the DM read only area (DM 6144 to DM 6599, and the PC Setup area
(DM 6600 to DM 6655), beware of the effect resulting from the SRM1’s delay in
the operation on other devices.
The first operation for the SRM1 after the above memory areas have been
changed will be a maximum of 850 ms later than the normal first operation with-
out changes.
SRM1 Cycle Times
A cycle time overflow warning will not be issued when any of the following opera-
tions are performed in either MONITOR or OPERATION modes. Be careful of
the effect of using online editing on SRM1 I/O response time.
•
Changes to the program using online editing.
•
Changes to the read-only DM area (DM 6144 to DM 6599.)
•
Changes to the PC Setup area (DM 6600 to DM 6655.)
When any of the above operations are performed, the SRM1 cycle time will be
increased by a maximum of 850 ms. During this tiny interrupts will be disabled
while the program or memory contents is written.
5-2
I/O Allocation for CPM1/CPM1A/CPM2A PCs
5-2-1 CPU Units
CPM1
No. of I/O
(on CPU Unit)
Model number
I/O
Allocated bits
Max. No. of
Expansion I/O
Units
Max. No. of I/O
(see note 1)
10
CPM1-10CDR-
Input
6 inputs: 00000 to 00005
1 (see note 1)
30
Output
4 outputs: 01000 to 01003
(
)
20
CPM1-20CDR-
Input
12 inputs: 00000 to 00011
1 (see note 1)
40
Output
8 outputs: 01000 to 01007
(
)
30
CPM1-30CDR-
Input
18 inputs:
00000 to 00011
00100 to 00105
1 (see note 1)
50
Output
12 outputs:
01000 to 01007
01100 to 01103
30
CPM1-30CDR-
-V1
Input
18 inputs:
00000 to 00011
00100 to 00105
3 (see note 2)
90
Output
12 outputs:
01000 to 01007
01100 to 01103
