Siemens Analog Inputs - PLCS.net

KA24DE · February 3rd, 2004, 07:44 AM

Hello Folks, I am trying to figure out how to make use of analog inputs and outputs in Siemens S7. I am familiar with Allen Bradley and for them I would just add a rung using a SCP scale with parameters which would look at the analog value comming in, scale it and send it to a location in my PLC. Very simple, is there a similar method in Step7. Your help would be greatly appreciated.

JRW · February 3rd, 2004, 11:08 AM

Look under your program elements> Libraries>Standard Library>
TI-S7 Converting Blocks>FC105 and FC107. If you click on these and press F1- a help menu will appear.
These will do what you are looking for, or build your own with a function or function block.

Beryl · February 3rd, 2004, 11:08 AM

I know there are other ways but FC105 is faily similar to the SCP in AB. Load the FC and the call it from you OB and it should work just fine.

KA24DE · February 3rd, 2004, 03:17 PM

Gentlemen, I appreciate the hell out of this information. I will be sure to give it a try!

DesertDog · February 3rd, 2004, 08:42 PM

I put a scaling function in the file area under Siemens a while ago.

JesperMP · February 4th, 2004, 05:05 AM

HERE is a previous thread about exactly the same topic.

In that thread I posted some S7 code that works exactly as the AB SCP function.
FC105 is a bit different from SCP (but is OK of course).

February 3rd, 2004, 07:44 AM	#1
KA24DE Member Join Date: Oct 2003 Posts: 21	Siemens Analog Inputs Hello Folks, I am trying to figure out how to make use of analog inputs and outputs in Siemens S7. I am familiar with Allen Bradley and for them I would just add a rung using a SCP scale with parameters which would look at the analog value comming in, scale it and send it to a location in my PLC. Very simple, is there a similar method in Step7. Your help would be greatly appreciated.

February 3rd, 2004, 11:08 AM	#3
Beryl Member Join Date: Sep 2003 Location: Boise, ID Posts: 118	FC105 I know there are other ways but FC105 is faily similar to the SCP in AB. Load the FC and the call it from you OB and it should work just fine.

February 3rd, 2004, 08:42 PM	#5
DesertDog Member Join Date: May 2003 Location: North of Los Angeles Posts: 347	I put a scaling function in the file area under Siemens a while ago. __________________ Glenn MCP, MCSE, MCDBA If I can't fix it, it ain't broke. With the help of PLCS.net

February 4th, 2004, 05:05 AM	#6
JesperMP Lifetime Supporting Member + Moderator Join Date: Feb 2003 Location: Copenhagen. Posts: 10,788	HERE is a previous thread about exactly the same topic. In that thread I posted some S7 code that works exactly as the AB SCP function. FC105 is a bit different from SCP (but is OK of course). __________________ Jesper Last edited by JesperMP; February 4th, 2004 at 05:08 AM.

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February 3rd, 2004, 11:08 AM	#2
JRW Member Join Date: Jun 2002 Location: Upstate South Carolina Posts: 846	Look under your program elements> Libraries>Standard Library> TI-S7 Converting Blocks>FC105 and FC107. If you click on these and press F1- a help menu will appear. These will do what you are looking for, or build your own with a function or function block.

February 3rd, 2004, 03:17 PM	#4
KA24DE Member Join Date: Oct 2003 Posts: 21	Gentlemen, I appreciate the hell out of this information. I will be sure to give it a try!

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