Spectrum-controls 140 MPM 204 00sc Manual de usuario descargar pdf (Pagina 52)

Quantum Series 140 MPM 204 00sc

Standing Clear of the EquipmentStanding Clear of the Equipment

Standing Clear of the Equipment

When troubleshooting any system problem, have all personnel remain clear of the equipment. The problem

can be intermittent, and sudden unexpected machine motion can occur. Have someone ready to operate an

emergency stop switch in case it is necessary to shut off power.

Program AlterationProgram Alteration

Program Alteration

There are several possible causes of alteration to the user program, including extreme environmental

conditions, electromagnetic interference (EMI), improper grounding, improper wiring connections, and

unauthorized tampering. If you suspect that a program has been altered, check it against a previously saved

program on an EEPROM or UVPROM memory module.

Safety CircuitsSafety Circuits

Safety Circuits

Circuits installed on the equipment for safety reasons, such as over-travel limit switches, stop pushbuttons,

and interlocks, should always be hard-wired to the master control relay. These devices must be wired in series

so that, when any one device opens, the master control relay is de-energized, thus removing power to the

equipment. Never alter these circuits to defeat their function. Serious injury or machine damage can result.

Refer to your system’s installation and operation manuals for more information.

Preventive MaintenancePreventive Maintenance

Preventive Maintenance

This section describes preventive maintenance procedures to help in maintaining your module.

TTENTIONTTENTION

TTENTION The National Fire Protection Association (NFPA) recommends maintenance

procedures for electrical equipment. Refer to article 70B of the NFPA for general safety-related work

practices.

Maintaining Printed Circuit BoardsMaintaining Printed Circuit Boards

Maintaining Printed Circuit Boards

The printed circuit boards of your module must be protected from dirt, oil, moisture, and other airborne

contaminants. To protect these boards, install the PLC system in an enclosure suitable for its operating

environment. Keep the interior of the enclosure clean, and whenever possible, keep the enclosure door closed.

Inspecting TInspecting T

Inspecting T

erminal Connectionserminal Connections

erminal Connections

Regularly inspect the module terminal connections for tightness. Loose connections can cause the module or

PLC system to malfunction, or damage module or system components.

ARNINGARNING

ARNING Before inspecting connections, always ensure that incoming power is off.

Failure to observe this precaution can cause personal injury and equipment damage.

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Spectrum-controls 140 MPM 204 00sc Manual de usuario Pagina 52