ASi safe slave control

[syd_b]

Hi, I want to know how to read and write to asi safe slave in Microwin. When the input is activated, in the program the contact begin switching ON and OFF. I´m using a s7-200 PLC 222cpu and a cp243-2. Thanks.

 

[dchartier]

Hi, I want to know how to read and write to asi safe slave in Microwin. When the input is activated, in the program the contact begin switching ON and OFF. I´m using a s7-200 PLC 222cpu and a cp243-2. Thanks.

Hello ayd;
The best place to start with Siemens material is their support website.
There you can dowload such manuals and FAQs as these:

CP 243-2 manual:
http://support.automation.siemens.com/WW/view/en/2659515

FAQ: How do you address the ASI slaves via the 243-2 in STEP 7-Micro/WIN?
http://support.automation.siemens.com/WW/view/en/8826798

Hope this helps,
Daniel Chartier

 

[syd_b]

Hi, dchartier.

I have beeing used Standard ASI Slaves and I know how to read and write thanks to the info you posted. The problem is how to work with ASI Safe Slaves that work different than standard asi slaves.

Thanks

 

[dchartier]

Hello syb;
As-i Safe modules are fully compatible with As-i standard addressing and monitoring. You need a Safety Monitor module to validate the safety status of the safety modules in your network.
Here is an extract from the Siemens As-interface system manual (chapter 9) that explains it a whole lot better than I can:

Integrating safety-oriented components
ASIsafe enables safety-oriented components (e.g. EMERGENCY STOP control devices, protective door monitors, optoelectronic protective devices, safety light curtains) to be integrated directly in an AS-Interface network. These are fully compatible with the standard AS-Interface components (master, slaves, power supply unit, repeater, etc.) to IEC 62061/EN 50295 and are operated together on the yellow AS-Interface cable.
The signals from the safety sensors are evaluated by a safety monitor, which not only monitors the switching signals from the safety sensors but also continuously ensures that data is transferred properly. The safety monitor is equipped with one or two enabling circuits, which are configured with one or two channels and are used to switch the machine or plant to safe mode. Sensors and monitors can be connected anywhere within the AS-Interface network. More than one monitor can also be used in a network.
A failsafe controller or special master is not required. The master treats safety slaves in the same way as all the other slaves and receives safety data for information purposes only.
This means that all existing AS-Interface networks can also be extended.​

http://support.automation.siemens.com/WW/view/en/26250840​

Hope this helps,
Daniel Chartier​

 

[dchartier]

Hello syd;
I hope this thread from Siemens' support website adds important details to your understanding of As-I Safe monitoring:
https://www.automation.siemens.com/...how.aspx?HTTPS=REDIR&PostID=21989&language=en

Hope this helps,
Daniel Chartier

 

[syd_b]

Hi Daniel,

That is a very useful information.

Thanks.