AOI for string.replace method - PLCS.net

BachPhi · February 7th, 2019, 08:23 PM

I am looking for an AOI that can do string.replace(sSearch,sReplace).

Thanks.

ASF · February 7th, 2019, 10:13 PM

I'd imagine it would be pretty easy to put together with a few COP, FIND, DELETE and CONCAT instructions. I've never actually built one though.

BachPhi · February 8th, 2019, 08:01 AM

Shocking! PLC programmers probably not aware of this useful function in .NET.

I ended up w/: FIND, GRT, DELETE, INSERT

ASF · February 10th, 2019, 03:40 PM

Ah, I didn't even think of insert, that'd make it even easier!

PLC's are generally not geared toward string handling at all. They can do it, but it's never been a focus, because why would you do string handling in a PLC when you could do it in the HMI/OIT/software? You'd need a HMI/OIT/etc to allow for string manipulation in the first place, so it makes sense to do it at that level.

I'm curious now - I can't think of any likely reason to need a string search-and-replace function within a PLC - what's your application?

Geoff White · February 10th, 2019, 10:39 PM

I use an AOI with this in it:
if WorkString.LEN>0 and SearchString.LEN>0 then
Find(WorkString,SearchString,1,FoundPos);
if FoundPos>0 then
Delete(WorkString,SearchString.LEN,FoundPos,WorkSt ring);
Insert(WorkString,ReplaceString,FoundPos,WorkStrin g);
end_if;
end_if;

BachPhi · February 11th, 2019, 03:15 PM

Quote:

Originally Posted by ASF

Ah, I didn't even think of insert, that'd make it even easier!

PLC's are generally not geared toward string handling at all. They can do it, but it's never been a focus, because why would you do string handling in a PLC when you could do it in the HMI/OIT/software? You'd need a HMI/OIT/etc to allow for string manipulation in the first place, so it makes sense to do it at that level.

I'm curious now - I can't think of any likely reason to need a string search-and-replace function within a PLC - what's your application?

Zebra Printing - further info here: https://www.advancedhmi.com/forum/in...8&topic=2209.0

ASF · February 11th, 2019, 03:28 PM

So why not do the find and replace using VBA in the AAHMI before it even gets to the PLC/printer?

BachPhi · February 11th, 2019, 03:35 PM

Quote:

Originally Posted by ASF

So why not do the find and replace using VBA in the AAHMI before it even gets to the PLC/printer?

If using PC & AAHMI, then yes. No PLC requirement
If using PLC only, then the new AOI will do the search & replace the variables in the ZPL string.

ASF · February 11th, 2019, 05:19 PM

Right, got it. In that case, I'd probably build the ZPL string up piece by piece using CONCAT instructions, instead of starting with a complete string with placeholders and replacing them. But there are plenty of ways to skin this zebra.

February 7th, 2019, 08:23 PM	#1
BachPhi Member Join Date: Dec 2007 Location: Los Alamos Posts: 270	AOI for string.replace method I am looking for an AOI that can do string.replace(sSearch,sReplace). Thanks.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Topics
Thread	Thread Starter	Forum	Replies	Last Post
Setting up a MSG in an AOI	pierrer	LIVE PLC Questions And Answers	7	November 22nd, 2018 03:37 PM
Editing AOI's in RS LOGIX 5000	dalcoleman	LIVE PLC Questions And Answers	6	July 25th, 2018 01:22 AM
Programming Exercise: Sorting Algorithm w/Dynamic AOI – Results	Paully's5.0	LIVE PLC Questions And Answers	19	January 29th, 2017 04:32 PM
AB AOI design Inputs, Outputs, or InOuts?	abishur	LIVE PLC Questions And Answers	5	November 16th, 2016 08:55 AM
WallClock and AOI Method	remullis	LIVE PLC Questions And Answers	12	January 30th, 2015 04:05 PM



This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc.
*Try our online PLC Simulator- FREE. Click here now to try it.* ---------->>>>>Get FREE PLC Programming Tips

February 7th, 2019, 10:13 PM	#2
ASF Lifetime Supporting Member Join Date: Jun 2012 Location: Australia Posts: 2,841	I'd imagine it would be pretty easy to put together with a few COP, FIND, DELETE and CONCAT instructions. I've never actually built one though.

February 8th, 2019, 08:01 AM	#3
BachPhi Member Join Date: Dec 2007 Location: Los Alamos Posts: 270	Shocking! PLC programmers probably not aware of this useful function in .NET. I ended up w/: FIND, GRT, DELETE, INSERT

February 10th, 2019, 03:40 PM	#4
ASF Lifetime Supporting Member Join Date: Jun 2012 Location: Australia Posts: 2,841	Ah, I didn't even think of insert, that'd make it even easier! PLC's are generally not geared toward string handling at all. They can do it, but it's never been a focus, because why would you do string handling in a PLC when you could do it in the HMI/OIT/software? You'd need a HMI/OIT/etc to allow for string manipulation in the first place, so it makes sense to do it at that level. I'm curious now - I can't think of any likely reason to need a string search-and-replace function within a PLC - what's your application?

February 10th, 2019, 10:39 PM	#5
Geoff White Member Join Date: Oct 2005 Location: Brisbane Posts: 330	I use an AOI with this in it: if WorkString.LEN>0 and SearchString.LEN>0 then Find(WorkString,SearchString,1,FoundPos); if FoundPos>0 then Delete(WorkString,SearchString.LEN,FoundPos,WorkSt ring); Insert(WorkString,ReplaceString,FoundPos,WorkStrin g); end_if; end_if;

February 11th, 2019, 03:28 PM	#7
ASF Lifetime Supporting Member Join Date: Jun 2012 Location: Australia Posts: 2,841	So why not do the find and replace using VBA in the AAHMI before it even gets to the PLC/printer?

February 11th, 2019, 05:19 PM	#9
ASF Lifetime Supporting Member Join Date: Jun 2012 Location: Australia Posts: 2,841	Right, got it. In that case, I'd probably build the ZPL string up piece by piece using CONCAT instructions, instead of starting with a complete string with placeholders and replacing them. But there are plenty of ways to skin this zebra.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)