S7 Common ODT in multi instance FB

i am having problems figuring out whats going on here. i have an FB which i called FB100, inside this i am comparing an integer value to a setpoint and triggering an alarm condition if its outwith the range. when the value is outwith the range i run a odt timer for 1 minute before issueing the alarm.
i am passing the s5t#1minute into FB100 from a parameter DB.

FB100 is used in 6 seperate instances....

The problem im having is when i simulate this using plcsim the timer elapses instantly and the alarm bit is set.
When i check online, the s5t#1m value is being passed into FB100. am i trying to do something which is not allowed??

im puzzled ????

This is a known problem with plcsim.

What version are you running ?

Version 5.3 SP1, i hope you are correct as i have been modifying my code but no matter what type of timer i use even SFB4, its still just times out instantly.

I have WinLC SoftPLC so i can test using that..

Thanks LD

I think the PLCSIM problem was with the IEC timers.
Was there also a problem with the S5Timers ?

Apart from that, S5Timers should best be avoided.
If Longhorn absolutley must use S5Timers, then post the code that doesnt work.

The current release of PLCSIM v5.4 SP3.
I think that your v5.3 SP1 is the "bad" one.

Thank you Jesper for your input, after LD gave us the hint that it could be PLC SIM, i searched the net and found this post:-

http://www.automation.siemens.com/WW/forum/guests/PostShow.aspx?PostID=30686&30686&Language=en

it would appear that there is a hotfix patch for this problem so i will try and get a hold of it.

Thanks all

LH