Mitsubishi Electric WS0-CPU0 - Function Blocks for Press Cycle Control

Chapter 9
240
Logic programming – Function blocks
9.12 Function blocks for press cycle control
9.12.1 Press setup
Function block diagram
General description
The Press setup function block is generally used together with the Universal press
contact or the Eccentric press contact function block in order to set up the press and in
order to provide the information of the Top output as input for this function block. The
Top output is required for single-stroke operation. Control of the press can, for
example, be effected by means of a two-hand control.
Parameters of the function block
Parameter Possible values
Restart interlock  Without
 When Release 1 or Start/Release is Low
 When Release 1 is Low or Top changes to High
 Always
Release 2 (start) input  With
 Without
Single stroke protection  With
 Without
Min. restart pulse time  100 ms
 350 ms
Ensure that the transitions of the signals for restarting fulfill the requirements of
the safety standards and regulations!
In case of a short-circuit to High (to 24 V DC) at a physical input, the evaluated signal
can have a pulse when the signal is reset due to the short-circuit detection. If such a
pulse can result in a dangerous state in the machine, the following points have to be
observed:
 Ensure protected cable laying for the signal line (due to cross-circuiting to other
signal lines).
 No short-circuit detection, i.e. do not reference to test outputs.
Figure 226:
Function block diagram for
the Press setup function
block
Table 109:
Parameters of the Press
Setup function block
ATTENTION