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Modbus Slave

Created by: k.k at: 2/19/2011 9:51 AM (7 Replies)

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2/19/2011 9:51 AM	Rate (0)
k.k Posts: 40 Rating: (0)	Dear Experts, We using ET 200s(6ES7 138-4DF11-0AB0) Modbus module as slave device , I configured all the parameters, in the programming part I created S_MODB block in the( OB1 )cyclicprogramme and also I created oneDB100 for Data conversion Slave Device Task is to do only read and wirte the few Memory bits(M)( Read Three Binary bits from master device & write Three Binary bits to master device ) so how to declare and configure this taskin the step 7 to get work fine. Thanks & Regards KK
k.k Posts: 40 Rating: (0)
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2/22/2011 4:49 PM	Rate (0)
k.k Posts: 40 Rating: (0)	Dear all, I am new to the ET200S Modbus communication. We have 6ES7138-4DF11-0AB0 Serial Interface Modbus module with ET200S IM 158 CPU . We have to Configure the Modbus module as a slave Device for Receiving and transmitting the signals to CCR room which has Master S7-400 PLC,in ET200S CPU with slave modulei configured slave address andparameters,what are the Programming procedure to be done and any functional blocks to be use in the slave side PLC ? If refered the example programme itrepresents written for Modbus master module so for slave operation any example programme is there. The signals for communiction is few binary signals ( For slave device 3 binary inputs and 3 binary outputs only ). how to tell & receive the signals from the master ? Attached herewith is our Hardware configuration. Thanks &regards, kk Attachment Config.JPG (525 Downloads)
k.k Posts: 40 Rating: (0)
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2/23/2011 9:24 AM	Rate (0)
Wizard Diamond Member Joined: 4/24/2006 Last visit: 1/14/2025 Posts: 8804 Rating: (1173)	Dear k.k, Here is a link to manual: SIMATIC ET 200S Serial interface modules See chapter 3.6 for more information. Best regards, Wizard

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2/23/2011 3:00 PM	Rate (0)
k.k Posts: 40 Rating: (0)	Dear Wizard, Thank u for kind reply to me. As per Manual in the 3.6 Chapter for the slave part i understand that we have create S_MODB function block and function code to be use in the cyclic programme. In our application in the slave part we have to send 3 Binary signals to Master ( Eg Address , M200.0,m200.1 & M 200.2 or Any DB Binary address ) and 3 Binary signals we have to receive from the master so howto define these signals in the programme to map the modbus address and how use the Data conversion table for binary signals. Pls send me if u have any modbus slave backup programme or if have any screen shot procedure for slave part Thanks & Regards KK
k.k Posts: 40 Rating: (0)	Last edited by: O_Moderator at: 2/23/2011 3:04 PM contact data deleted
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3/6/2011 12:45 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 1/15/2025 Posts: 3029 Rating: (1058)	Hello k.k you should already have an example Modbus Slave program for the ET200S 1SI module in the "Sample projects" tab of the "Open Projects" window in Simatic Manager (from memory this is installed when you install the PtP configuration package, but don't quote me on that). Anyway, ifyou don't have it, you can get it together with the latest FB versions from the link below: Function Blocks, Examples and User Manuals for the Serial Interface Module ET200S 1SI Apart from that, I encourage you to have a good and quiet read of the manual that Wizardprovided you with. It is very detailed and has (should have) all the info you need. Having said that, a general understanding of Modbus and its Function codes does help too and you'll find plenty of helpful material at http://www.modbus.org/. Last but not least, Modbus related question appear quite frequently on the Siemens Forum, just in case you haven't done so already you canfind them - together withFAQ's - with a search at https://support.automation.siemens.com. I hope this helps
	Last edited by: fritz at: 3/6/2011 12:47 AM fixed typos Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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3/7/2011 7:37 PM	Rate (0)
k.k Posts: 40 Rating: (0)	Dear Sir, In the Latest Download, the Example programme is written for both modbus master and slave, I can't find what steps arefollowed for et200s modbus slave. As per the Manual for slave part i understand that we have to create s_modb FB81 in cyclic programme and Data conversion table but I am not get clear info where modbus data's will be stored for communication&how to define ?, Holding registersis used for reading and writing the Data's between master and slave, in slave side we have to check the Data'susing Modscan tool wheaher slave is communicating or not .... Pls reply the procedure for et200s modus slave programming. Thanks & Regards KK
k.k Posts: 40 Rating: (0)
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9/17/2012 6:17 AM	Rate (0)
sorooshi Posts: 19 Rating: (0)	k.k Dear Sir, In the Latest Download, the Example programme is written for both modbus master and slave, I can't find what steps arefollowed for et200s modbus slave. As per the Manual for slave part i understand that we have to create s_modb FB81 in cyclic programme and Data conversion table but I am not get clear info where modbus data's will be stored for communication&how to define ?, Holding registersis used for reading and writing the Data's between master and slave, in slave side we have to check the Data'susing Modscan tool wheaher slave is communicating or not .... Pls reply the procedure for et200s modus slave programming. Thanks & Regards KK __-------------------------------------------- dear kk i have got the same problem like you......we Have at least 7 CCR(MCR3 product by ADB) and one CPU 315 pn/2dp plus 2 cp341...... i have studied thall the ralated manuals, but i cannot undertand how can we send the different steps of brightness for each CCR....would you please guide me with an example...... best regards soroosh
sorooshi Posts: 19 Rating: (0)
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11/4/2015 11:10 AM	Rate (0)
Wit_Moderator Moderator Joined: 8/21/2014 Last visit: 1/9/2025 Posts: 1036 Rating: (14)	New question published by mushtaq is split to a separate thread with the subject Writing values by Modbus master using ET200S. Best regards The Helping Hand
	My Forum is the place to personalize your profile, track your topics, and maintain content that interests you. Best regards Wit_Moderator
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