Table of Contents
Advertisement
Chapter 4 Basic functions and System configuration
4.1
Selection of CPU module for compact remote system
There are three methods to use compact remote system by I/O assignment and compression mode selecting.
(1) Normal remote method
(2) Compression remote method
(3) 4W/4W method
Differences between these methods are shown in Table 4.1. I/O assignment of master module and compression mode
selecting determines the maximum mountable number of master modules on basic unit, the maximum number of
slave stations per master module, and maximum remote I/O points. Normal remote method has 256points per master
for remote I/O and free location of input modules and output modules on slave station. I/O assignment "REMOTE 2"
is supported by EHV-CPU16 to 128, EH-CPU516, and EH-CPU548. So, We recommend these CPU for compact
remote system. But in the case of using EH-CPU104A to 316A for cost reduction, please set "Word 4W/4W" for I/O
assignment for master module.
In the case of "Word 4W/4W" I/O assignment there is a disadvantage of not using internal inputs indicating remote
refresh cycle time and so on. But in this case there is an advantage of not limiting it to the number of mounting of
master modules per CPU. So, you can construct large-scale remote system with twisted pair cable by use many
master modules per CPU.
CPU module
Using method of
compact remote
I/O assignment of master
I/O assignment of slave
Number of mountable
master module
Number of connectable
slave modules
Number of occupied
channels in master
Input
Number of
I/O points
Output
Master
Compression
mode setting
Slave
Special internal outputs for
remote function
Operation parameters for
remote function
Basic system
Replace of H-200
Replace of large H
Replace of EM
(Note 1) Please refer to Section 6.2 for detail of special internal outputs for remote function
Table 4.1 Using method of compact remote for each CPU
EHV-CPU16/32/64/128，EH-CPU516/548
Normal remote
Compression
method
remote method
REMOTE 2
X16, Y16,
B1/1 for all slots
Empty 16points
4 modules/CPU
8 modules / master
16
I/O 256 points
Input 128 points
（free location）
Output 128 points
OFF
OFF
Available (Note 1)
Available (Note 1)
Not available
Not available
Section 4.3.1
Section 4.4.1
Section 4.4.2
Section 4.5.1，
4.5.3, and 4.5.4
Section 4.6.1
Section 4.6.2
4W/4W method
WORD 4W/4W
Unnecessary
Not limited
(according to CPU)
4 modules / master
8
4
Input 64 points
Output 64 points
ON
OFF
ON
ON
Not available
Not available
－
Section 4.3.2
－
－
Section 4.5.2
4 – 1
EH-CPU104A/208A/316A
4W/4W method
WORD 4W/4W
Unnecessary
Not limited
(according to CPU)
4 modules / master
4
Input 64 points
Output 64 points
OFF
ON
Not available
Not available
Section 4.3.2
－
Section 4.5.2
Advertisement
Table of Contents
