Hitachi EH-150 Series - Page 153

Chapter 7 System setup
7 - 9
 Check flow of Simple data link mode
Data link start
YES
NO
Data is updated
OK?
NO
All participating flag
OFF?
NO
YES
OK
Please check a connection part with
EH-SIO.
Please station change time and slave
response waiting time, and see a situation.
YES
Please check the address
of data link area.
Data is updated
rarely.
NO
YES
Slave participating
flag OFF?
YES
NO
Please check the following items.
- Setup of communication port of slave station
- Adjustment of a station No.
(Participating registration and slave station)
- Adjustment of a transmission speed
- A connection part with a slave station
- Connection of a cable
Replace the CPU module.
Reboot the power several times.
If this does not solve, replace the module
A
Supported CPU?
(Type, Version)
YES
NO
Replace the CPU module.
A
Connection of
communication
cable OK?
YES
Please connect a
communication cable correctly.
NO
Participating flag
ON?
Reference :
 The cause which cannot communicate has many wiring mistakes of a communication cable. When communication
does not work, please check connection of a cable first.
 A setup of the transmission format configuration of EH-SIO should surely use 7-bit / even parity / 1 stop bit.
 The capacity of an internal output changes with models of CPU. Moreover, the classification of an internal output
may not exist. (There is no area of WL in MICRO-EH / MICRO-EHV.)
Please check the internal output of a slave station and assign link area.