BCD thumbwheel switch help

Hello, I have a BCD thumbwheel ttl switch. It has 5 leads on it. They are maked 1 2 4 C 8. Does any one know what the leads are?

I have no info on them, other than the markings on the switch which are C&K USA and some numbers 02854 93.

It is a 0-9 A-F thumbwheel. I'd like to wire them (I have 4) into a 1746-IG16 ttl input module.

If anyone could shed some light on this it would be great.

Thanks John

Um gee...

1's (bit 0)
2's (bit 1)
4's (bit 2)
8's (bit 3)
Common

You know I'm not a student of PLC's, I'm actually a 2 term Millwright Appretice who has a passion for the electrical side of things mainly PLC. I own three plc's and currently two home made trainers or simulators and gathering the parts for an upgraded version.
When I come to the site and ask a simple Q in a Q & A forum I don't expect to be belittled.

For the most part people have been really helpful and I thank them for that.

John

Sheesh...

You got the data you were requesting in 8 minutes and that's your response?

I'm sorry you were offended. I really am. But I think it's got more to do with the chip on your shoulder than my lame attempt at a light hearted post.

Excuse me for responding, I'll try not to let it happen again.

If you put your source voltage (with a TTL module,probably +5VDC) to 'C' and wire the others as mellis suggested to the input module and wired nothing else(for simplicity right now) then read the value of the input module as a WORD you should see the expected values 0 = 0. If you don't get this then post again with your results. And by the way - if it has the numbers 0-9 AND the letters A-F then it is a hexadecimal thumbwheel. You should see the word values 0 through 15. A BCD thumbwheel would stop at 9.

johnny,

Read this it may help, its out of the manual for a DL06


.

No chip here!

Hello,

Sorry Mel, I don't really bother you guys alot and at times it seems that unless your a member that works, sleeps, and eats PLC then your not a member. I realize I'm not a pro at this so sorry for at times asking Q that seem to be easy. I spend a lot of time just reading posts and learning as much as I can, I save program examples for future use and it really helps to understand. This site offers a termendous amount of information, which I appreciate greatly.

Thanks for helping the less fortunate, keep up the great work.
John

thumbwheel switch

bernie_carlton said:

If you put your source voltage (with a TTL module,probably +5VDC) to 'C' and wire the others as mellis suggested to the input module and wired nothing else(for simplicity right now) then read the value of the input module as a WORD you should see the expected values 0 = 0. If you don't get this then post again with your results. And by the way - if it has the numbers 0-9 AND the letters A-F then it is a hexadecimal thumbwheel. You should see the word values 0 through 15. A BCD thumbwheel would stop at 9.

Click to expand...

May I asked how to read the data from the thumbwheel switch aside from using DSW command? That command wont work for me because it will turn ON the series 4 Y outputs but in my case the outputs I need are not series, Y22, y23, y26 & y27.

The DSW command says dsw S D1 D2 n.. The S is the source (x) head device, the D1 is the Y head device to which the strobe signal is output, the D2 storing numeric value and the n as the total # of 4 digit switch.. The y22, y23, y26 & y27 i mean about is the D1 i used. When I put y23 as the D1, it will turn ON the nest 4 series outputs but my Y24 & Y25 should not be included because they had been wired to solenoid valves.

so, I tried another, is it correct: where x40 is for manual selector switch here:

/m8000/---------------(m1)
/m1/--/x40/--[mov k1x34 d1]
[mov k1x35 d2]
[mov k1x36 d3]
[mov k1x37 d4]

after turnibg ON the selector switch, i initially got these values:

x34 = 0
x35 = 8
x36 = 4
x37 = 2

why? my purpose of moving is just to convert the BCD data into binary.. I tried [BIN K1X34 D1] just replacing mov with BIN.. Am I at the right truck? I need to read the data from my digital switch/ thumbwheel and convert these into binary for PLC operation.. Am I thinking the right thing?

Any help or further explaination for the thumbwheel usage please..

Thank you very much.. I understand my thread always repeats by itself..

Sincerely,

sheryl- Philippines