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MidniteFighter
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PLC programming in TI 435 processor

07/03/2007 8:10 AM

Hi all,

I need to change out a siemen Ti 435 processor due to hard to find replacement parts and other various reasons to a SLC 500 processor. First of all, let me say that I don't know much about the Siemen Ti PLC, I'm more familiar with Allen Bradley's PLC. I understood most of the statment except the end where it had the following commend:

LD K32

LD K32

LDA O40500

WX TA1

All those commend are energized together when an input is true. I know when using two consecutive Load instructions will place the value of the first load instruction onto the accumulator stack, but what does it mean?? And how do I do this in SLC?? As to the WX instruction I have no idea what it does, can someone help me?? Thanks.

MidniteFighter

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PWSlack
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#1

Re: PLC programming in TI 435 processor

07/03/2007 8:55 AM

One possibility is to revisit the Functional Design Specification for the Siemens Ti435, and to use that to program the SLC500 as if the Ti435 code were unavailable.

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Sparkchaser
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#2

Re: PLC programming in TI 435 processor

07/03/2007 11:56 PM

That looks like you are scaling a bi-directional analog input. I might still have a manual around and can find you some instructions.

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MidniteFighter
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#3
In reply to #2

Re: PLC programming in TI 435 processor

07/05/2007 8:37 AM

Thanks. Any help would be very much appreciated.

MidniteFighter

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Anonymous Poster
#4

Re: PLC programming in TI 435 processor

07/12/2007 12:32 AM

I believe the instruction set is for writing data from a master plc to a slave plc via U-01DM or similar module. In the first LD instruction the "3" refers to the slot of the U-01DM, the "2" refers to the network address of the slave. The 2nd LD tells number of bits or bytes to be trabsfered. The LDA instruction specifies the start address on the slave for the WX instruction to write to.

Do a search on "U-01DM" to find clearer info than what I can supply. Add "communications" to the search for a 2nd run.

- Will
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MidniteFighter
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#7
In reply to #4

Re: PLC programming in TI 435 processor

07/18/2007 10:36 AM

Thank you for your reply. That help a lot. Once again, thank you.

MidniteFighter

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JRaef
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#5

Re: PLC programming in TI 435 processor

07/13/2007 1:35 AM

LOL, you are replacing an obsolete PLC, with another soon-to-be obsolete PLC!

Why not contact Siemens and tell them you need to upgrade to their latest Step-7 PLC, but you need help with the conversion from the TI. They have people who know how to do that, but they are not going to be willing to help you convert to AB!

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MidniteFighter
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#6
In reply to #5

Re: PLC programming in TI 435 processor

07/18/2007 10:34 AM

The reason I'm converting it to AB SLC is because most of my in plant electricians are familar to it, but not all of them are familar to Siemen's. For that reason, I would like to change it to AB's.

MidniteFighter

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Users who posted comments:

Anonymous Poster (1); JRaef (1); MidniteFighter (3); PWSlack (1); Sparkchaser (1)

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