7 Inspection and Maintenance
7 - 4
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
Required Tools
• Flat-blade screwdriver
• Phillips screwdriver
• Voltage tester or digital voltmeter
• Industrial alcohol and pure cotton cloth
• Antistatic gas duster
Tools Required Occasionally
• Oscilloscope
• Thermometer and hygrometer
If you find any faulty Unit after check, replace the Unit according to the following points.
• Do not replace a Unit until the power is turned OFF.
• Check the new Unit to make sure that there are no errors.
• If you return a faulty Unit for repair, describe the problem in as much detail as possible, enclose this
description with the Unit before returning it.
• For poor contact, take a clean cotton cloth, soak the cloth in industrial alcohol, and carefully wipe the
contacts clean. Be sure to remove any lint prior to remounting the Unit.
• Make sure that the required data, including the user program, configurations, settings and
variables is transferred to a CPU Unit that was replaced and to externally connected devices
before restarting operation. Be sure to include the tag data link settings and routing tables,
which are stored in the CPU Unit.
• The absolute encoder home offsets are backed up in the CPU Unit as absolute encoder
information. When you change the combination of the CPU Unit and Servomotor, e.g., when
you add or replace a Servomotor, define the absolute encoder home again.
Precautions for Correct Use
If you replace a slave or Unit, refer to operation manual for the slave or Unit for information on
the data required for individual slaves or Units and redo the necessary settings.
Tools Required for Inspections
7-1-3 Unit Replacement Precautions
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