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Chapter 9
241
Logic programming – Function blocks
Input signals of the function block
The Press setup function block supports the following input signals:
Start/Release
The
Start/Release
input signal is used to indicate the beginning and the end of the
press movement. A rising edge (Low to High) at the
Start/Release
input signals a
start of the press. A Low
Start/Release
input signals a stop of the press. If
Restart
interlock
is set to
When Release 1 or Start/Release is Low
, a valid restart sequence
is required after a stop that was caused by a Low
Start/Release
input signal.
Release 1 (static)
The input signal
Release 1 (static)
is mandatory. The
Enable
output always changes
immediately to Low, if
Release 1 (static)
is Low.
If this function block is used together with a press contact function block (e.g.
Eccentric press contact or Universal press contact), the
Enable
output of this press
contact function block must be connected with the
Release 1 (static)
input of the
Press setup function block.
Release 2 (start)
The input signal
Release 2 (start)
is optional. If
Release 2 (start)
is configured, the
Enable
output can only change to High (e.g. during switching on), if
Release 2 (start)
is High. If the
Enable
output is High,
Release 2 (start)
is no longer monitored.
Do not use the Release 2 (start) input for safety purposes!
Do not use the
Release 2 (start)
input for initiating safety stops, because this input is
evaluated temporarily during the start sequence only. Otherwise the operator of the
press will be in danger.
Top
The
Top
input signal is used in order to determine the end of the press cycle (i.e. the
press has reached the top dead center). This signal is available at the function blocks
Eccentric press contact or Universal press contact. The
Top
input signal is used for
single-stroke protection. When the
Single stroke protection
configuration parameter
is set to
With
, the
Enable
output changes to Low when the
Top
input changes from
Low to High.
Do not use the Top input for safety purposes!
Connect the
Top
input only with the
Top
output of an Eccentric press contact or
Universal press contact function block or to an equivalent signal source. Do not use
the
Top
input for initiating safety stops. Otherwise the operator of the press will be in
danger.
ATTENTION
ATTENTION
Summary of Contents for SW1DNN-WS0ADR-B
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Page 298: ...Chapter 15 295 Annex 15 1 2 Example application Wood scanner ...
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Page 307: ...Chapter 15 304 Annex 15 1 3 Example application Ramp down detection ...
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