Hitachi Hidic EH-150 Applications Manual page 89

Preliminary Rev.03
Chapter 9
Check the module dairy or regularly on order to use EH-ETH in best condition and keep the system run
normally.
9.1 Dairy Check
Check the following items on running condition.
AS to EH-150 series PLC, see the application manual "EH-150 application manual(NJI-280B)"
Check item
Status LED
*1: EH-ETH indicates the error content of module by the color and flash interval.
See "chapter 4 LED indication" for detailed information.
9.2 Regular Check
Execute the following checks once half of a year, power off the basic base where EH-ETH is mounted and
external I/O circuit. But check these items more frequently according to your using condition.
Check item
Installation
Connection of
transmission cable
Appearance
Environment
Spare module
Program
* Be careful not to change the module setting switch by mistake when you clean the module.
The contents of this manual might be changed without notice.
MAINTENANCE,CHECK,ERROR
Table 9.1 Dairy check item
LED Method
POW
Visual check
I.ERR
ERR
STATUS
Table 9.2 Regular check
Content
(1) All modules are securely
fixed
(2)All connectors fit snugly
(3) All screw are tight
(4) All cables are normal
Is the cable disconnected?
Is the cable applied irregular
weight?
Is the module very dusty?
Is there remarkable trouble?
(1) temperature
(2) humidity
(3) the others
Number of unit, storage
condition
Check program
Chapter 9 Maintenance, check, error
Normal Typical cases of the problem
Lit(Green) Disconnect of cable
Unlit Ethernet setting is wrong.
Unlit Communication abnormal
Lit(Green) Lit (red): system software abnormal
Flash(Green/red): abnormal
Measure
No defects
Light POW LED when power
on.
No defects
No defects
0 to 55 (C
20 to 90% RH (no condensing)
No dust, foreign matter,
vibration
No defects
The programs of the final
program and inside CPU should
be same.
9-1
*1
Remark
Tighten the screws
Check the insert
Tighten the screws
Visual check
Change the cable.
Check wiring route and
setting condition
Cleaning and
maintenance
Visual check
Visual check
Check master and backup
program both.