S5-100U Function Modules
Example 2: Approaching a Setpoint in Down-Count Direction
Figure 15-23. Approaching a Setpoint in Down-Count Direction
Enable input
Example of
actual value
Output,
diagnostic bit
setpoint reached
1000 2000 3000 4000 5000 6000 7000
Setpoint
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Direction of traverse
• Actual value= 7000: The enable input is set to “1”.
• Actual value= 3000: The setpoint is reached, the output and the diagnostic bit “setpoint
reached” are set.
• Actual value= 1000: The enable input is set to “0”, the output and the diagnostic bit are reset.
Example 3: Reversal of Direction after Approaching a Setpoint
Figure 15-24. Approaching a Setpoint in Up-Count Direction and
Consecutive Reversal of Direction
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Direction of traverse
Enable input
Output,
diagnostic bit
setpoint reached
Change of direction
1000 2000 3000 4000 5000 6000 7000
Setpoint
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Direction of traverse
Example of
actual value
• Actual value=1000: The enable input is set to “1”.
• Actual value=3000: The setpoint is reached, the output and the diagnostic bit “setpoint
reached” are set.
• Actual value=4500: The traversing path is reversed.
• Actual value=1000: The enable input is set to “0”, the output and the diagnostic bit are reset.
Note
Set outputs can be reset only via a “0” signal to the enable input.
15-36
EWA 4NEB 812 6120-02
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