s7 - 200, subroutines and timers

adfox · Jul 14, 2006

Hi, i've got a sbr that takes 2 input parameters - Time for low state and time for high state and it sets for example a flag for 5 sec. and keeps it reseted for another 5 sec...

Looks like this:

VAR_INPUT
T_Off:WORD;
T_On:WORD;
END_VAR
VAR_OUTPUT
Out:BOOL;
END_VAR
BEGIN

Network 2 // Flag 5 sec.

LD SM0.0
LPS
A M0.5
TON T38, LW0
LRD
A T38
TOF T37, LW2
LRD
A T38
A M0.5
R M0.5, 1
LPP
AN T38
AN T37
AN M0.5
S M0.5, 1

Network 3 // Put to output
LD M0.5
= L4.0

I want to use this subroutine more than once in my project but:
i can't pass specified timers names as an subroutine argument and i can't use the same timer twice, can anyone help me ?

I'm using s7-200 226 and step micro win v4.0 .
I'll be very grateful for Your help.

PeterW · Jul 14, 2006

I'm more of an S7-300/400 user so have never used Microwin, but I assume it will be similar to, if some what cut down, the bigger systems.

The code you have reproduced show that the Timers are hard-coded in the block. therefore the block as it stands cannot be used as a multi-call block.

You'll need someone else to help with what you choices are to make it a multi-call block. Sorry can't be of better help.

Gambrinus · Jul 14, 2006

I didn't use MicrowIN some years, but I think you must to use indirect addressing of timers if you want to use timer in multi-call subroutine.

adfox · Jul 14, 2006

Yes, that's right - timers are hard coded because i can't pass the value to the function, tried passing the timer name as string, as a word and it fails at the compile time.

At least i've made it in one network so using it as copy-paste-change timer values will work for me, but i'm looking for a way to make it as a small elastic function...

Gambrinus · Jul 14, 2006

It can be compiled
NETWORK 1
MOVD &VB30, VD0
MOVD &T1, AC1
NETWORK 2
TON *AC1, *VD0

adfox · Jul 14, 2006

Gambrinus said:
It can be compiled
NETWORK 1
MOVD &VB30, VD0
MOVD &T1, AC1
NETWORK 2
TON *AC1, *VD0

Ok,it does compile... but sorry it will take time for me to get it to work, i'm new in plc programming and i don't know how to use what You wrote but thanks i'll try to make use of it.
Thanks!

adfox · Jul 14, 2006

Heh, it compiles but the download fails... i'm just reading about indirect addressing and try to make something similiar to Your example but why the plc doesn't want to download the program :/

Gambrinus · Jul 14, 2006

Can you download it with direct timer number?

Gambrinus · Jul 14, 2006

Maybe &VB must be changed to &VW because preset is INT. But I amn't sure. Try to change direct to indirect step by step.

adfox · Jul 14, 2006

I can't tell it now because i'm home now, but within 12 hours i'll be back at work and will check it out, thanks!

adfox · Jul 15, 2006

Gambrinus said:
Maybe &VB must be changed to &VW because preset is INT. But I amn't sure. Try to change direct to indirect step by step.

&Vw doesn't compile, changing the first T1 in my case 37 the same, changing the second one make it works but it's still the same...

Gambrinus · Jul 17, 2006

Sorry, I haven't time now to try to solve this problem. Maybe will be more faster to post your question in this phorum:
http://simatic.net.ru/
There are many egg-heads which understand English.

Damir · Jul 19, 2006

S7-200 dosen`t support indirect timer addressing like S7-300/400.
The attached library offers the required timers.

adfox · Jul 20, 2006

Hey

thanks! That's what i needed! Thank You all for help.

s7 - 200, subroutines and timers

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