Chapter 9
251
Logic programming – Function blocks
Parameters of the function block
Parameter Possible values
Number of breaks 1 to 8
Mode Standard
Sweden
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.
PSDI time monitoring 0 = disabled, 1 to 500 s
Condition for Release 2
(start) input
Without
Necessary for first start
Necessary for every start
Start of first PSDI pulse
(PSDI input Low→High)
After Top has been reached
After the start of upstroke
Restart interlock Always
Deactivation on upstroke (only for PSDI)
Without
Min. restart pulse time 100 ms
350 ms
Start position Everywhere
Only on top
Min. break pulse time 100 ms
350 ms
Use fault present With
Without
Ensure that the transitions of the signals for restarting fulfill the requirements!
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.
Input parameters and input signals of the function block
Standard or Sweden mode
The Mode parameter specifies the complete start sequence for the N-break function
block. Standard mode requires that the configured number of breaks is carried out,
followed by a valid restart sequence.
Sweden mode first requires a valid restart sequence, followed by the configured
number of breaks.
Table 112:
Parameters of the N-break
function block
ATTENTION
To Next Page
Loading...
