Chapter 4. Basic Cpu Link Operations 4-1 To; System Configuration - Hitachi Hidic EH-150 EH-OLNK Applications Manual

Chapter 4 Basic CPU Link Operations
4.1

System Configuration

An example of the optical type CPU link module configuration is shown is figure 4.1.
It is possible to connect up the EH-OLNK together with upper level H series CPU link modules (OLINK-H,
OLINK-SH) As indicated in figure 4.1, it is possible to use both upper level H series optical type CPU link
modules and CPU modules in a link system loop.
A maximum of two link modules can be installed into any of the slots between #0 and #2 on a single basic
base unit (although link modules cannot be installed onto additional bases.) It is also possible to connect a
maximum of 64 units onto one link system. (At least one unit must be assigned as station No.0 (master
station) on a link system.)
The length of the transmission route can be up to 1,000m between stations, and have a total length of
15,000m for the link system
Caution
No.00 station(master station) must exist in link system. When No.00 station is not exist, and link operation
and RUN LED turns off or ERR LED is flickering every 0.5s. When No.0 station is not exist, own station
error information(WRF0E0, WRF140) remains H0000.(The information which No. station is not exist is not
stored to own station error information.)
ST0
Link system 1
ST1
ST63
Link system 2
ST62
Link system 4
Figure 4.1 Example of a CPU Link System Configuration
Chapter 4. Basic CPU Link Operations
ST0 ST63
ST2
ST0 ST3
ST1
4-1
ST61
ST62
ST1
ST0
Link system 4
Large H series
ST1