Page 36 - AUTOMATION EISBN
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Communication Connection Damage
• The conductor in the communication cable is disconnected.
• The connection pin on the terminal is bent or broken.
• The pin connection is loose.
• There is interference in the communication cable connection caused
by motors, loops, high voltage, untidy soldering and so on.
• There is a short circuit among the conductors in the communication
cable.
Power Supply Disruption
• A power supply interruption occurs in an automation control system when
the supply voltage drops below 85% of the rated value. This situation will
cause the PLC to stop immediately.
PLC INTERNAL DAMAGE
• The relay or transistor on the Output Unit / Module inside the PLC
burns out.
• The optocoupler on the Input Unit / module does not work.
• Burnt fuse.
• Low storage battery.
• Micro electronic components (Microprocessor, RAM, ROM burn).
Considerations On Installation And Wiring
• Avoid installing PLCs in places that have the characteristics as below.
• Direct exposure to sunlight.
• Ambient temperatures exceed the range of 0 ° C to 55 ° C.
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