Chapter 7. Maintenance And Inspections 7-1 To; Daily Inspections; Regular Inspections - Hitachi Hidic EH-150 EH-OLNK Applications Manual

Chapter 7 Maintenance and Inspections
7.1

Daily inspections

Check the following items to ensure the operational status of the equipment. Refer to Chapter 6 (Error
Displays and Troubleshooting) for further details on errors.
Item
Link system
participation status
Error display LED
confirmation
Data transmission and
receiving
7.2

Regular inspections

Check the following points without any power applied for both I/O signals and power line.
Check whether the transmission cable
connector is tightened firmly.
Check whether the case and connectors
are clean.
The confirmation of the outside 5VDC
input voltage.
Readjust at the time of the voltage
range outside.
Perform the regular inspections once every six months. The inspection cycle may be speeded up in
accordance with the environment in which the modules are installed.
Table 7.1 Daily inspection items
LED
RUN LED
ERR LED
TXD LED
Blinking
RXD LED
Table 7.2 Regular inspection items
Item
Tighten
Remove dusts by a vacuum cleaner
Measure the voltage of the connector for the
5VDC supply by the digital bolt meter, and
adjust it so that a measurement voltage may
become 5.00V DC to 5.20V DC.
Chapter 7. Maintenance and Inspections
Normal Abnormal
ON OFF
ON or
OFF
Blinking
ON or OFF
Method
7-1
Error cause
Depending on
each error display.