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Basic troubleshooting
9
Troubleshooting
Troubleshooting
This chapter describes various troubleshooting procedures, as well as corrective actions.
9.1
Basic troubleshooting
The system reliability does not depend only on reliable peripheral devices but also on short
down-times in case of trouble. In the following the most important points for troubleshooting are
listed.
Visual checks
● Is the power ON or OFF?
● Status of inputs and outputs?
● Condition of wiring (I/O lines, cables)?
● Status of LED indicators (AS-I, ERR, POWER, Status LEDs inputs/outputs)?
Trouble check
Observe any changes of the error during a short switching OFF and ON of the power supply.
9.2
Toubleshooting via LEDs
The modules provide several LEDs supporting the troubleshooting. The status of the LEDs and
corresponding diagnostic procedures are described in chapter 4, "Description of the modules".
9.3
Short-circuit handling
If a short-circuit or overload of the sensor or actor supply occurs a reset will be triggered. The
slave is decoupled from the network and the error is signalled to the master.
User’s manual MC-ASI modules
9–1