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

Chapter 7
In order to use the EH-RMP 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
EH-RMP indication
(2) Periodic inspection
Turn off the power for the external I/O ladder and check the following items once every six months.
Programming device to
CPU
Power supply
Installation and
connecting areas
Ambient environment
Spare parts
Program
Daily and Periodic Inspection
Table 7.1
LED Inspection
display method
STATUS Visual check
RDY Visual check
RUN Visual check
ERR Visual check
TOKEN Visual check
Table 7.2
Part Item
Check operation of
programming device
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
Check number of parts,
storage condition
Check program contents

Chapter 7 Daily and Periodic Inspection

Items for daily inspection
Normal status
Lit Green When unlit: Power supply error or
When lit Red: Hardware error of EH-RMP
When flashing Green: Wrong setting value.
When flashing Red: Hardware error of EH-RMP
Lit Green When unlit: Power supply error or
When flashing: Hardware or system error
Lit Green or When unlit: Power supply error or
Flashing 4Hz
When random flashing: configuration error or fatal
Unlit When lit Red: error on communication line
Lit Green When unlit: Power supply error or
Items for periodic inspection
Check criteria
All switches and display lamps
work normally.
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
No defects
Compare the contents of the
latest program saved and CPU
contents, and make sure they are
the same
7-1
Main cause of error
Hardware error of EH-RMP.
Hardware error of EH-RMP.
Hardware error of EH-RMP.
Error
Hardware error of EH-RMP
Remarks
Tester
Tighten
Check insertion
Tighten
Visual check
Visual check
Visual check
Check both master and
backup.