6 Maintenance
6 - 2
NA-series Programmable Terminal Hardware(-V1) User’s Manual (V125)
6-1 Periodic Maintenance and Inspection
Periodic inspections are required in order to maintain the NA-series PT in the best operating condition.
Observe the following precautions to enable smooth troubleshooting when problems occur.
Backing Up the Sysmac Studio Project
Always make a backup of the Sysmac Studio project and store it in a safe place. You will need it if
you have to send in the NA Unit for repairs or if replace the NA Unit with another NA Unit.
Spare NA Units
We recommend that you keep spare NA Units on hand to enable faster system recovery when prob-
lems occur with an NA Unit, the backlight reaches the end of its life making the display hard to see,
etc.
Although the major components in NA Unit have an extremely long life time, they can deteriorate under
improper environmental conditions. Periodic inspections are thus required. E_SYS_015 error may
occur in an periodic inspection because it happens when the battery voltage has dropped to less than
the specified value. This error does not happen when the battery voltage is less than the specified value
before startup. To check a drop in the battery voltage, install the system to monitor the system variable
"_HMI_Is BatteryLow".
Inspection is recommended at least once every six months to a year, but more frequent inspections will
be necessary according to the ambient environment.
Take immediate steps to correct the situation if any of the conditions in the following table are outside of
the criteria.
6-1-1 Preparations for Problems
6-1-2 Periodic Inspection
Periodic Inspection Points
No. Item Inspection Criteria Correction
1Source
power
supply
Check for voltage fluctuations
at the power supply terminals.
The voltage must be
within the allowable
voltage fluctuation
range (19.2 to 28.8 V
(24 V ±20%)).
Use a voltage tester to check the
power supply at the terminals. Take
necessary steps to bring voltage
fluctuations within limits.
2 Ambient
environ-
ment
Make sure that the ambient
temperature (e.g., the temper-
ature inside the control panel)
is suitable.
0 to 50°C
*1
Use a thermometer to check the
temperature and ensure that the
ambient temperature remains
within the allowable range.
Make sure that the ambient
humidity (e.g., the humidity
inside the control panel) is suit-
able.
The relative humidity
must be 10% to 90%
with no condensation.
*1
Use a hygrometer to check the
humidity and ensure that the ambi-
ent humidity remains within the
allowable range. Be careful of the
condensation caused by tempera-
ture changes.
Check that the NA Unit is not in
direct sunlight.
Not in direct sunlight Protect the NA Unit if necessary.
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