Chapter 7 Daily And Periodic Inspection - Hitachi HIDIC EH-150 Applications Manual

Chapter 7
In order to use the EH-IOCP functions in the most desirable condition and maintain the system to operate normally,
it is essential to conduct daily and periodic inspections.
(1) Daily inspection
Verify the following items while the system is running.
Item LED display
EH-IOCP STATUS
indication
LINE-ON
LINE-OFF
DIAG
(2) Periodic inspection
Turn off the power for the external I/O ladder and check the following items once every six months.
Part
Power supply
Installation and
connecting areas
Ambient environment
Daily and Periodic Inspection
Table 7.1 Items for daily inspection
Inspection method
Visual check
Visual check
Visual check
Visual check
Table 7.2 Items for periodic inspection
Item
Check for voltage fluctuations
(1) All modules are securely fixed
(2) All connectors fit snugly
(3) All screws are tight
(4) All cables are normal
(1) Temperature
(2) Humidity
(3) Other

Chapter 7 Daily and Periodic Inspection

Normal status
Lit Green When unlit: Power supply error or
Hardware error of EH-IOCP.
When lit Red: Hardware error of EH-IOCP
When flashing: This module has some error or
warning.
Lit Green When unlit: Power supply error or
Unlit When lit Red: This module could not communication
Unlit When flashing: This module has some error or
warning.
Check criteria
85 to 264 V AC (when EH-PSA)
21.6 to 26.4 V DC(when EH-PSD)
No defects
0 to 55 °C
20 to 90 % RH (no condensation)
No dust, foreign matter, vibration
7-1
Main cause of error
This module could not communication
with Profibus-DP Master
with Profibus-DP Master.
Remarks
Tester
Tighten
Check insertion
Tighten
Visual check
Visual check