NUM 1020 M - Page 227

en-938821/2 6 - 3
Operational Problems
6
When a failure occurs, the operator can identify the symptoms of this failure by refering to the trouble-shooting flow
charts below.
The purpose of the flow charts is to find a solution to the failure.
Three types of graphic symbols are used:
SPEED = 0
?
Yes No
Choice: The operator must answer the question asked by yes or no; the
aswer to the question decides of the nest step.
Display
"PLC MEMORY" page
☞
@
2
PLC
I/O
Action: The operator must perform an action before going to the next
step.
Examine the PLC
programme to
determine the origin
of the fault.
Solution: Tells the operator how to remedy the failure.