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I/O Link Units for CPM2C
Section 5-10
I/O Memory of the CPU Unit in which the CompoBus/S Master Unit is
mounted.
Allocation to CPM2C I/O
Bits
As with other Expansion I/O Units for the CPM2C, both input and output bits
for the I/O Link Unit start with the word following the last word allocated to the
CPM2C CPU Unit or the previous Expansion I/O Unit to which it is connected.
If the last input word allocated to the CPM2C CPU Unit or the previous Expan-
sion Unit is word m, and the last output word allocated to that Unit is word n,
word allocations are as shown in the following figure.
An I/O Link Unit for the CPM2C Series can be connected to the first 20-point I/
O CPM2C CPU Unit as shown in the following figure.
Note
1.
Data transmissions are not synchronized for all 8 I/O points. Eight-point
data simultaneously output from the Master CPU will not always reach the
CPM2C CPU Unit simultaneously. Eight-point data simultaneously output
from the CPM2C CPU Unit will not always reach the CPU Unit of the Mas-
ter simultaneously. If 8-point data needs synchronization, write the ladder
CompoBus/S Master Unit (SRM1
CompoBus/S Master Control Unit
or CPM2C-S Series)
CompoBus/S Communications Cable
(Special flat cable or VCTF cable)
CPM2C CPU Unit
CPM2C-SRT21 I/O
Link Unit for
CPM2C
I/O Link Unit for CPM2C
Input word m+1
Output word n+1
Transmission data to Master
Data from Master
CompoBus/S commu-
nications error
0: Normal
1: Error
CompoBus/S communications
0: Not in communication
1: In communication
---: Not used for AR bits
---: Used for AR bits
Word m+1
Word n+1
Input number
IR 000
Output number
IR 010
Input number
IR 001
Output number
IR 011
CPU Unit
(with 20 I/O
points)
CPM2C-SRT21 I/O
Link Unit for
CPM2C