Chapter 9
243
Logic programming – Function blocks
9.12.2
Press single stroke
Function block diagram
General description
The Press single stroke function block is generally used together with the Universal
press contact or the Eccentric press contact function block in order to provide the
information of the
Top
and
Upstroke
outputs as input for this function block. The
Top
output is required for single-stroke operation. Controlling of the press can, for example,
be implemented by means of a Two-hand control or an N-break function block in
connection with a safety light curtain.
Single-stroke protection is always active and cannot be configured. This means: When
the signal of the
Top
input changes to High, the
Enable
output is always set to Low.
The requirements for a restart depend of the configuration of the parameter for
Restart interlock
.
Parameters of the function block
Parameter
Possible values
Restart interlock
Without
When Release 1 or Release 3 or Start/Release is Low
When Release 1 or Release 3 is Low, or Top changes to
High
Always
When Release 1 or Release 3 is Low
Release 2 (start) input
With
Without
Release 3 (safety) input
With
Without
Mode for Start/Release input
Stepping
Start
only
Mode for upstroke muting
Inactive
For Release 3
For Release 3 and Start/Release
Max. Up-Stroke muting time
0 = disabled, 1 to 7200 s. The Upstroke input is available
only if the value is not set to 0.
Min. restart pulse time
100
ms
350
ms
Ignore Release 3 (safety) for
Restart interlock in top position
Yes
No
Figure 228:
Function block diagram for
the Press single stroke
function block
Table 110:
Parameters of the Press
single stroke function block
Summary of Contents for SW1DNN-WS0ADR-B
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