Procedural functions of mechanical presses
© Siemens AG 2003 All Rights Reserved
SIMOTION Safety Unit (AP) - Edition 06.2003
5-45
5.4 Valve monitoring
If, for mechanical safety reasons, the clutch/brake-combination is equipped with
limit switches that display the switching position of the valves, these are read in via
the feedback inputs in the control unit and compared to the activation of the outputs
(watchdog timer).
Note
If an electrical valve monitor is not in use, monitoring must be accomplished by
means of other measures with a comparable degree of safety (hydraulic or
electric).
Parameterization
Figure 5-8 Mechanical operation – Watchdog timer
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