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s7300 communication with ABB ACS 800

Created by: veer at: 8/28/2011 8:54 AM (5 Replies)

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8/28/2011 8:54 AM	Rate (0)
veer Posts: 103 Rating: (0)	Dear exprts i m using cpu313c-2dp and abb acs 800 vfd,i want to read the analog input of vfd in plc which is the outputof a danser at vfd , want to control the rpm of motor with the input of danser using PID in plc plz tell me how to read the drive analog input in plc if it possible and also how to it in pid thanx
veer Posts: 103 Rating: (0)
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8/29/2011 7:59 AM	Rate (1)
UMENCHO Diamond Expert Joined: 3/21/2006 Last visit: 11/1/2024 Posts: 10229 Rating: (1181)	Hello, Both AI and AO should be configured as the same type (for example 4-20mA). In ABB go to "Reference Selection" section (parameter 11.03) and set which analog input will be a setpoint (for example AI2). In section "Analog Input" (parameter 11.x) assign the limits of AI (min 4mA, max 20mA). From PLC you should send a setpoint reference using a AO. And this reference will depends of the logic inside in PLC program. The same logic is applied concerning reading the drive speed (send from AO) and read it in AI in PLC. Take a look at STEP 7 library -> IEC standard block ->FC105 "SCALE". (http://support.automation.siemens.com/WW/view/en/1765297)About using a PID block use a search option here in forum and will find an examples for the same. Best regards, Hristo Mihalev

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8/29/2011 8:50 AM	Rate (0)
veer Posts: 103 Rating: (0)	dear umencho i wanna know that how to read the analog input i.e.AI2 address into plc and how to this address with the PID controller in PLC to control the speed of the motor. as i read from abb firmware manual to read the input of drive in pofibus module (RPBA-01) for example if we want to read par 11.03 , 11.03*100 and convert it to hex after this i dont know how to access this address in plc that is i want to know from u thanx
veer Posts: 103 Rating: (0)
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8/29/2011 10:10 AM	Rate (0)
Ammy Platinum Member Joined: 4/19/2008 Last visit: 9/3/2024 Posts: 1525 Rating: (159)	veer dear umencho i wanna know that how to read the analog input i.e.AI2 address into plc and how to this address with the PID controller in PLC to control the speed of the motor. as i read from abb firmware manual to read the input of drive in pofibus module (RPBA-01) for example if we want to read par 11.03 , 11.03*100 and convert it to hex after this i dont know how to access this address in plc that is i want to know from u thanx Hi Veer, you are doing communication on Profibus With Drive? & you have to do the Controlling of the Speed through the Profibus is it right ? using PID in S7 PLC ?
	Ammy New for every one.............. “No duty is more urgent than that of returning thanks.” If Problem Solved......! I can't help you privately - please post in the Forums
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8/29/2011 10:31 AM	Rate (1)
UMENCHO Diamond Expert Joined: 3/21/2006 Last visit: 11/1/2024 Posts: 10229 Rating: (1181)	veer dear umencho i wanna know that how to read the analog input i.e.AI2 address into plc and how to this address with the PID controller in PLC to control the speed of the motor. as i read from abb firmware manual to read the input of drive in pofibus module (RPBA-01) for example if we want to read par 11.03 , 11.03*100 and convert it to hex after this i dont know how to access this address in plc that is i want to know from u thanx So, AI in ABB drive will receive a reference value from AO from PLC. In order to scale that value in PLC and to send it in good format to the drive use a FC106 from Siemens TI-S7 standard libraries. The output of this function will connect to some PQW number based on hardware configuration and hardware connected to the AI in drive. The opposite - read the drive speed feedback in PLC AI. In drive should assign that on AO will send a actual speed. Then in PLC connect that AO to AI (PIW) and suing a FC105 from Siemens TI-S7 standard libraries make the scaling of that signal. Best regards, Hristo Mihalev

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8/29/2011 10:41 AM	Rate (1)
UMENCHO Diamond Expert Joined: 3/21/2006 Last visit: 11/1/2024 Posts: 10229 Rating: (1181)	Ammy veer dear umencho i wanna know that how to read the analog input i.e.AI2 address into plc and how to this address with the PID controller in PLC to control the speed of the motor. as i read from abb firmware manual to read the input of drive in pofibus module (RPBA-01) for example if we want to read par 11.03 , 11.03100 and convert it to hex after this i dont know how to access this address in plc that is i want to know from u thanx Hi Veer, you are doing communication on Profibus With Drive? & you have to do the Controlling of the Speed through the Profibus is it right ? using PID in S7 PLC ? Now there is a mess. Let's clarify the things. 1. Parameters 11.x are "Reference Selection" in ABB drive. In case of configured 11.3=AI2 means the setpoint for that drive will come via analog output from external device. In that case take a look at my explanations how to proceed further out. 2. Profibus module (RPBA-01) - in case of using it like a setpoint "source" in above mention parameters should be assign a Profibus. And then take a look at* Abb1.zip. Best regards, Hristo Mihalev

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