TIA Portal V13 Emergency Stop FB

Hi All,

I am trying to program S7 1500 Siemens PLC with Tia Portal first time to use the software

I have a number of Dual Channel Emergency Stops and in the software the Function Block for the Emergency Stop seems to be a single channel arrangement
Is there another block for Dual Channel or do I have to program each channel separately

Thanks appreciate any help

The dual channel functionality is handled by the input card and the background software for the safety program presenting you with one channel to use in safety program.

As LD said, the safety input cards can handle the 2 channel comparison for you. However, if you want to do it in the program, you can use the 1oo2 block to do the discrepancy checking.

There is also a door switch block that has similar functionality to the estop block, but 2 channels instead of one.

Thanks Guys appreciate your help

Is there any documentation on the explanation of this, I have various manuals from Siemens website but nothing on the explanation

I see channel parameters etc.. but I am not seeing how to set up a dual channel signal to the EStop FB

Appreciate it if you could shed more light on this

Thank you

schui said:

Is there any documentation on the explanation of this, I have various manuals from Siemens website but nothing on the explanation

I see channel parameters etc.. but I am not seeing how to set up a dual channel signal to the EStop FB

Appreciate it if you could shed more light on this

Thank you

Click to expand...

There is a safety configuration and programming manual that explains how the blocks are intended to be used, and there are manuals for each of the failsafe input cards explaining how they should be configured and wired for different scenarios. What it won't say is how to do anything besides what is specifically intended; there is a lot of liability involved in safety systems.

The typical (intended) way to do it is to set the F-DI card up as 1oo2 evaluation. It does the discrepancy evaluation in HW in the card, and then it passes the result to the safety PLC. you read the first input channel from the estop, and pass that to the Estop block.

As I said in the previous post, there are other ways that this could be set up, setting up the hardware as 1oo1 and then using a 1oo2 block for the discrepancy check, or using one of the other application blocks (like SFDOOR) instead.

I'm not sure how many specific code samples you'll find; generally speaking, you shouldn't touch safety unless you already know exactly what you are doing.

Thanks mk42 I have it working now

Why are Siemens so different than everyone else, AB, Pilz, Omron all fairly standard and easy to get to grips with

Thanks again

Hi

As for was once told by a very wise man
Don't question why Siemens do things the way they do, it's Siemens
Once I got that into my head working with Siemens did become easier

Donnchadh

Well.. He installed software, didn't read any manuals and he's fumbling through safety.
Wait till he gets to the difficult stuff.