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