S5 Function Block

Hi There
Can anyone help me work out how this function block may work.
(attached pdf)
It is controlling a stepper motor and the stepper reqires the output "ERRE to be on, I cannot work out the code contained within it to actually make this

When you're dealing with Siemens, especially Step5, it sometimes helps if you can speak German!

Unfortunately, I don't know Step5, but until somebody comes along who does, here are some pointers.

The NW Title is Grundstellung, this is the initial or home state.
HM(1) is the abbreviation for Hilfsmerker, which is a scratch flag.

I thought I could sort this out from S7 knowledge, but got stuck with the RB instruction. It appears to be some sort of Clear (Reset) instruction.

If you can clear up exactly what the RB command does and, in particular, if you can post a copy with the complete comments, then I'm pretty sure I can sort this out for you.

..

U = And
UN = AndNot
LW = Load 16bits (Word)
S = Set
RB = Reset
SE = Delay On Timer

Inputs are all bits (BOOL) except for ZEIT which is a Timer and WERT which is in S5 time format .

The first section


so if star and ends are both on and hm1 is off, the latch laeu, stop and hm1.


The second section


If hm1 and stop are both on, start extended timer zeit for length of time wert.

On completion of time, latch manu

The third section

If ends is off, latch erre and unlatch manu

If erre is on and star is off, then unlatch hm1, laeu, stop and erre.

If rese is off, reset both manu and hm1.

Hi Peter
thanks for the answer on this, I still cannot get the block to operate as I see it should.
I have "ends" off and "rese" on from the code it should set "erre" on is that correct.
With this as it is I have no outputs operating

if Ends is off, then erre is set BUT if star is off, it will reset erre

so ends off and star on is required to keep erre on.

Thanks again Peter, this gives me some more to look into tomorrow