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Chapter 11. Troubleshooting
11-
1
Chapter 11 Troubleshooting
The following explains contents, diagnosis and corrective actions for various errors that can occur during system operation.
11.1 Basic Procedures of Troubleshooting
System reliability not only depends on reliable equipment but also on short downtimes in the event of faults. The
short discovery and corrective action is needed for speedy operation of system. The following shows the basic i
nstructions for troubleshooting
.
1) Visual checks
Check the following points.
• Machine operating condition (in stop and operating status)
• Power On/Off
• Status of I/O devices
• Condition of wiring (I/O wires, extension and communications cables)
• Display states of various indicators (such as POWER LED, RUN LED, ERR. LED and I/O LED). Afte
r checking them, connect peripheral devices and check the operation status of the PLC and the prog
ram contents.
2) Trouble Check
Observe any change in the error conditions during the following.
• Switch to the STOP position, and then turn the power on and off.
3) Narrow down the possible causes of the trouble where the fault lies, i.e.:
•
Inside or outside of the PLC?
•
I/O module or another module?
•
PLC program?
11.2 Troubleshooting
This section explains the procedure for determining the cause of troubles as well as the errors and corrective actions.
Is the power LED turned OFF?
Flowchart used when the POWER LED is turned OFF
Is the ERR LED flickering
?
Flowchart used when the ERR LED is flickering
Are the RUN LED turned OFF?
Flowchart used when the RUN turned OFF.
I/O module doesn’t operate pro
perly
Flowchart used when the output load of the output module
doesn’t turn on.
Program cannot be written
Flowchart used when a program can’t be written to the PLC
Содержание MASTER-K80S
Страница 27: ...Chapter 4 Names of Parts 4 4 1 3 30 points base unit 4 1 4 40 points base unit 4 1 5 60 points base unit...
Страница 66: ...Chapter 6 Input and Output Modules 6 3 30 point base unit 4 40 point base unit DC24V DC24V DC24V...
Страница 67: ...Chapter 6 Input and Output Modules 6 5 60 point base unit DC24V DC24V...
Страница 206: ...Chapter 8 Communication Function 8 63 You can see the frame list which is designated Click OK button...