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change Profibus Transmission rate in my program

Created by: YurArm at: 2/21/2012 2:06 PM (5 Replies)

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2/21/2012 2:06 PM	Rate (0)
YurArm Posts: 10 Rating: (0)	How can I change Profibus Transmission rate in my program? I made preconfigured DP I-slave (gsd-based on IM154-8). Customer must to have ability for changing DP address and DPspeed of my DP I-slave. Without using STEP7 or NCM, but with, for example, web-interface or Touch panel.
YurArm Posts: 10 Rating: (0)	Last edited by: YurArm at: 2/21/2012 2:11 PM
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2/23/2012 9:48 PM	Rate (0)
Rated X Posts: 1547 Rating: (129)	If you only program a slave you should use auto detect of baudrate. For the address you can deliver your devices with default address 126 and use set address function of PROFIBUS using a commissioning device. The set addressfeature you have to enable in your gsd: Set_Slave_Add_supp = 1 The address only can be changed during state WPRM (wait parameters) The address change command hasmaster SAP 62,slave SAP 55 and 4 byte of data: new address, Ident Nummer high Byte, Ident Nummerlow Byte, 0 or 1 (will block further set of address). After that a power reset of the slave is required.
Rated X Posts: 1547 Rating: (129)
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2/24/2012 9:01 AM	Rate (0)
YurArm Posts: 10 Rating: (0)	Thanks for your reply, Rated X! but I did not understand you clearly. Let me explain my situation. I made STEP7 project with ET200 pro controller IM 154-8 PN/DP. I made this plc asIntelligent DP SLave ( I-Slave ) in my project. thenConfigured input-output. Configured integrated web-site. Made own web-pages to configure some params and setpoints. Also I downloaded from siemens site it'sGSD-file. We will sell this PLC as OEM-solution. We will give to customer (or his system integrator) GSD file, so he can integrate our DP I-Slave in it's PROFIBUS NET and in factory process. They will use eg. Omron plc's to read from our PLC some data over PB DP net. Customer will buy, for example, 20 pcs. of our PLC. So we must give to end-user ability to change Address and BaudRate of PROFIBUS. Because of many pcs. in one PROFIBUS network. Where can I set PROFIBUS "auto detect of baudrate" in my et200pro cpu project .(see screen of my project hardware above). May be I can use some special SFCs to do that? And which manuals about profibus can I read? exampleof my test et200s DP master system in which I integrated my gsd-based et200pro
YurArm Posts: 10 Rating: (0)	Last edited by: YurArm at: 2/24/2012 9:09 AM Last edited by: YurArm at: 2/24/2012 9:08 AM Last edited by: YurArm at: 2/24/2012 9:04 AM
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2/25/2012 10:18 PM	Rate (0)
Rated X Posts: 1547 Rating: (129)	Thanks YurArm, for your detailed description. I checked the manual (I think you already have) http://support.automation.siemens.com/WW/view/en/44251850 and found some hints in chapter 8.5.3. I hope this is what are looking for. It means before you connect your i-slave 154 to a DP-master of your customer you haveto do some configuration via PROFIBUS DP in commissioning mode. This includes the DP-slave address. General GSD-file you can download here: http://support.automation.siemens.com/WW/view/en/21221197 (I think you also know) This might include some configuration and parameterization info if you use a 3rd party master. Some ideas you can get from this document: http://support.automation.siemens.com/WW/view/en/1452338 But you can not integrate the DP-address to the GSD-file. For Baudrate I thinkit is ok: The ASIC that handles the DP-interface will detect the baudrate automaticly. If you want to confirm simply start up you test configuration, disconnect IM154, change baudrate to your Master and connect your IM154 again.
Rated X Posts: 1547 Rating: (129)
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2/27/2012 8:53 AM	Rate (0)
YurArm Posts: 10 Rating: (0)	I am configuring not IM 154-1 or IM154-2 but IM154-8.it is CPU. So i have not an common DP slave, but Intelligent DP slave (I-slave).. is there difference between common DP slave and Intelligent DPSlave for all you said. All you said is right fo I-slave?
YurArm Posts: 10 Rating: (0)
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2/27/2012 6:49 PM	Rate (0)
YurArm Posts: 10 Rating: (0)	I tested connections to my system. GSD was standart - from SIemens site. with checked "Test, Commissioning, Routing" check box in the DP Interface Properties in my PLC IM154-8. Master baudrate < > Slave baudrate ( DP S7 ) Master baudrate = Slave baudrate ( DP S7 ) with UNchecked "Test, Commissioning, Routing" check box in the DP Interface Properties in my PLC IM154-8 Master baudrate < > Slave baudrate ( DP S7 ) Master baudrate = Slave baudrate ( DP S7 ) ________ (DP - works, DP - does not works) ________ 1.1. - is that config I want! but S7 connections does not work.. ((( We see that S7 connections does not work with auto baudrate...(( ________ about address. interesting document http://support.automation.siemens.com/WW/view/en/1452338 will try to make smth...
YurArm Posts: 10 Rating: (0)	Last edited by: YurArm at: 2/27/2012 8:04 PM Last edited by: YurArm at: 2/27/2012 7:37 PM Last edited by: YurArm at: 2/27/2012 7:34 PM
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