West Control Solutions KS98-1 - Manual (Page 111)

Parameters:
Parameter Description Range Default
Mode 1
Source of pulse duration at z1 Parameter Ti1 Para.Ti1 t
Input Ti1 Input Ti1
Mode 2
Source of pulse duration at z3 Parameter Ti2 Para.Ti2 t
Input Ti2 Input Ti2
Ti1 Duration of the pulse generated by d1,when Mode 1 = Para.Ti1 is entered. 0,1...999 999 [s] 1
Ti2 Duration of the pulse generated by d2, when Mode 2 = Para.Ti2 is entered. 0,1...999 999 [s] 1
III-4.8 STEP (step function for sequencing (No. 68))
The STEP function realizes the individual steps for sequencing.
The function starts with RESET at step 1 and remains at this step, until the relevant condition input d
1
or the skip input
is set from 0 to 1. This is followed by switch-over to step 2. The procedure for all further steps is identical.
The step number is output as a value at output Step.
Example:
Switch-over from step 3 (
Step = 3) to step 4 (Step = 4) is only after the condition at d3 was met (d3 = 1). The con-
dition at d4 is checked only when calling up the function for the next time. Thus immediate switch-over is prevented. As
long as d3 = 0, the value of output Step remains 3.
Alternatively, a positive flank at input skip also leads to switch-over to the next step (independent of the status at
input d1..d10).
a
The function has a ‘memory’. This means: after power-on, it continues operating with the step at
power-off, provided that the RAM data are still unchanged.
When several switch-over conditions are 1 simultaneously (e.g. d1, d2, d3, d4 and d5), only the instantaneously
effective input is handled. I.e. in each calculation cycle, switch-over is only by one step. For realizing a sequencing with
more than 10 steps, the STEP function can be cascaded:
The wiring example shows how 2 STEP functions are cascaded. With cascading, step number 1...n is output always as
a value at output
Step of the last follow-up step.
For resetting the cascaded stepping control, reset wiring at the 1st function block is required.
Logic functions 9499-040-82711
III-111 STEP (step function for sequencing (No. 68))
reset
stop
skip
Casc
activ
Step
d1
d10
...
STEP
Reset