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How to know when safety rules are violated?

Created by: steffo at: 6/18/2011 9:00 AM (4 Replies)

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6/18/2011 9:00 AM	Rate (0)
steffo Posts: 38 Rating: (0)	I would like to notify the user that a safety rule has been violated, what signal should i connect to my plc so that I can show it inthe HMI. I'm using Sinamics S120 with aTM54F module. /Stefan
steffo Posts: 38 Rating: (0)	Last edited by: steffo at: 6/18/2011 9:00 AM
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6/18/2011 3:13 PM	Rate (0)
DenisMor Posts: 344 Rating: (50)	Safety Integrated issues a fault if any inconsistencies are detected in the safety logic. Sending fault code to the PLC (adding r2131 Actual Fault Code to the Profibus telegram of the drive) will allow to display messages on the HMI. Both safety related messages and regular drive faults can be displayed.
DenisMor Posts: 344 Rating: (50)
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7/1/2011 7:37 PM	Rate (0)
steffo Posts: 38 Rating: (0)	Thanks for your reply Dennis. Im using Telegram 110, and cannot find the errorcode, just the error bits. Today I had a problem with my drives, they required a Safety reset, and was not moving, no errors where generated at all?! I have put a timesupervision on the ALM enable, if I don't get ALM.Enabled I give an alarm to the operator. But today I didn't even get that, that must mean than the ALM was enabled (I was not on the site when the error occured, so I couldn't see what gad happend) Is there a way that we can hardwire a connetion between the drive and PLC, telling the PLC that it needs a Safey reset? Thank again Stefan
steffo Posts: 38 Rating: (0)
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7/6/2011 2:30 AM	Rate (0)
DenisMor Posts: 344 Rating: (50)	The fault code is not part of the standard telegram: you have to extend the telegram and add a fault code parameter r2131 to the send message frame. Directions on extending the telegram are in the following forum thread. If you would rather have a hardwired input signal to the PLC, you can use one of the CU320 outputs. The interconnection can be configured on the Safety Integrated Wizard screen. In the attached screen shot, the Safe Torque Off Active output status is connected to DI/DO 8 (parameter P738) on the control unit. Attachment STO.jpg (123 Downloads)
DenisMor Posts: 344 Rating: (50)
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7/6/2011 7:04 AM	Rate (0)
steffo Posts: 38 Rating: (0)	Thanks alot, for your answer. Think I will go with the extended message frame. //Stefan
steffo Posts: 38 Rating: (0)
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