Mitsubishi Electric WS0-CPU0 - Press Single Stroke

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