Trouble Shooting
© Festo Didactic GmbH & Co. • MPS 167
Although the program is loaded to the PLC and normal position is reached (RESET-
Light flashing) the Station may not be started (RESET-Light not change to off).
The starting condition is, that the Station is in normal position, which is indicated by
flashing of the RESET-light. The reason for malfunction must be the START-button
itself.
Measuring of the current path No. 1 may be proceeded in different ways. In the
following, two examples may be described, and both of them are leading to result.
• measuring of voltage
• measuring of continuity
For better understanding, the current path No. 1 may be shown as an equivalent
diagram:
0V
0V
24V
XK1
24V
XMG2
21
XMG2
13
2
0V-clamp
PLC
R
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