Chapter
5
51
Maintenance and Troubleshooting
The Mini–PLC–2/15 Controller has been designed to minimize the need for
maintenance and troubleshooting. Status and diagnostic indicators on the
Controller help to trace the source of a fault to the user’s hardware or the
Controller.
The Mini–PLC–2/15 Controller is an electrical system comprised of printed
circuit boards. Every effort has been made to enclose this circuitry to limit its
exposure to soot,oil spray, conductive particles, etc.
Dirty industrial environments require some special user considerations. The
interior of the enclosure should be kept clean and the enclosure door should be
kept closed, when possible, to exclude industrial contaminants.
Periodic inspection of terminal strip connections,plugs, sockets, and module
connections for tightness should be made. loose connections may not only
result in improper function of the Controller, but may also result in damage to
the components of the system.
WARNING: To ensure personal safety and to guard against
damaging the equipment, all connections should be inspected
with external power removed from the system.
Stocking a full set of spare parts as replacement parts is recommended for
minimizing downtime. Table 5.A, lists the spare parts and their recommended
quantities for the Mini–PLC–2/15 Controller.
Assuming proper grounding and wiring practices have been observed and
system start–up procedures have been completed, most problems will have been
identified and corrected. Those that have not can be identified and corrected by
using a careful and systematic approach when troubleshooting. The step–by–
step procedures presented in the
troubleshooting flowchart in Figure 5.1 will help the troubleshooter to identify
the source of a fault systematically.
General
Preventive Maintenance
Spare Parts
Troubleshooting
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