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Configuration of Instrumentation System
Section
1-2
33
Input and Output of Contacts
(1) When exchanging data without specifying the address on I/O
memory (on Field Terminal block)
The Loop Control Unit can exchange contacts (bit data) with the Basic I/O
Unit or the Contact I/O Unit of the Special I/O Unit. In data exchange with
these units, use the DI Terminal and DO Terminal blocks on the Field
Terminal block having the corresponding number of contact I/O points.
On the DI Terminal and DO Terminal blocks, set the leading allocated
address of the Contact I/O Unit for performing contact I/O operations.
Unit
I/O
Number of
points
Function block
Contact Input Unit
I
8
DI 8-point Terminal (Block Model 501)
16
DI 16-point Terminal (Block Model 502)
I
32
DI 32-point Terminal (Block Model 503)
64
DI 64-point Terminal (Block Model 504)
Contact Output Unit O
5
DO 5-point Terminal (Block Model 511)
8
DO 8-point Terminal (Block Model 512)
12
DO 12-point Terminal (Block Model 513)
16
DO 16-point Terminal (Block Model 514)
32
DO 32-point Terminal (Block Model 515)
64
DO 64-point Terminal (Block Model 516)
Contact I/O Unit
I/O
16/16
DI 16-point/DO 16-point Terminal (Block
Model 518)
Note
In the case of a contact I/O Field Terminal block, select the function block not
according to Unit model but according to the number of contact I/O points.
(2) When exchanging data with a specified address on I/O memory (on
CPU Unit Terminal block or the Expanded CPU Unit Terminal block)
When the Loop Control Unit exchanges contacts (bit data) with a specified
I/O memory address, use the DI Terminal from CPU Unit and DO Terminal to
CPU Unit blocks on the CPU Unit Terminal block or the Expanded AI
Terminal from CPU Unit or Expanded AO Terminal from CPU Unit in the
Expanded CPU Unit block.
In this instance, the Loop Control Unit can exchange data with any type of
unit as long as the data is allocated to the I/O memory addresses indicated in
the following table. (For example, data on analog terminals allocated to the
CompoBus/D Area can also be exchanged.)
The following table shows I/O memory that can be specified on CPU Unit
Terminals or the Expanded CPU Unit Terminal:
Area type
I/O memory address of
CS1 CPU Unit
Remarks
CIO (channel I/O) Area
0000 to 6143 words
Including I/O Area,
CompoBus/D Area, Data
Link Area, and Special I/O
Unit Area, (
1)
Work Area (W)
W000 to 511 words
Holding Area (H)
H000 to 511 words
Data Memory (D)
D00000 to 32767 (words)
Including Special I/O Unit
Area in Data Memory Area
Extended Data
Memory (E) bank No.0
E0_00000 to E0_32767