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9-3
Section
Maintenance
164
9-3
Maintenance
This section describes the routine cleaning and inspection recommended as
regular maintenance.
9-3-1 Cleaning
Clean the PROFIBUS-DP Units regularly as described below in order to keep it
in its optimal operating condition.
•
Wipe the Unit with a dry, soft cloth for regular cleaning.
•
When a spot can’t be removed with a dry cloth, dampen the cloth with a neutral
cleanser, wring out the cloth, and wipe the Unit.
•
A smudge may remain on the Unit from gum, vinyl, or tape that was left on for a
long time. Remove the smudge when cleaning.
Caution
Never use volatile solvents such as paint thinner or benzene or chemical wipes.
These substances could damage the surface of the Unit.
9-3-2 Inspection
Be sure to inspect the system periodically to keep it in its optimal operating
condition. In general, inspect the system once every 6 to 12 months, but inspect
more frequently if the system is used with high temperature or humidity or under
dirty/dusty conditions.
Prepare the following equipment before inspecting the system.
Required Equipment
Have a standard and phillips-head screwdriver, multimeter, alcohol, and a clean
cloth.
Equipment that could be needed
Depending on the system conditions, a synchroscope, oscilloscope,
thermometer, or hygrometer (to measure humidity) might be needed.
Check the items in the following table and correct any items that are below
standard.
Item
Standard
Equipment
Environmental
di i
Ambient and cabinet temperature See below.
Thermometer
conditions
Ambient and cabinet humidity
See below.
Hygrometer
Dust/dirt accumulation
None
---
Installation
Are the Units installed securely?
No looseness ---
Are the communications
connectors fully inserted?
No looseness ---
Are the external wiring screws
tight?
No looseness ---
Are the connecting cables
undamaged?
No damage
---
The following table shows the acceptable temperature and humidity ranges for
PROFIBUS-DP Units.
Unit
Acceptable temperature
Acceptable humidity*
Master Unit
0
_
C to 55
_
C
10% to 90%
MULTIPLE I/O
TERMINAL
(Communication Unit,
I/O Units)
--10
_
C to 55
_
C
25% to 85%
Inspection Equipment
Inspection Procedure