Created Date: November 20,2006

Created by: crown spec pack

Heh, forgot my other password, and I can't get to my other email right now.

Anyone look at this at all? I guess it's not that important (doesn't equate to production downtime if I don't figure out why it doesn't work), but if someone knows right away looking at it, could you let me know? I just don't understand why it doesn't work without the additional C2 coil.

If no one replies I won't bug you again, promise. I'll assume I was right and it's not important/appropriate for the forum. No worries! The machines are all running http://forum1.automationdirect.com/board/smile.gif

Thanks!

Created Date: November 27,2006

Created by: researcher

Can you try something. I had something similar, maybe not quite the same but I added 'nop ' commands between outputs. I had 5 outputs that indicated different alarms. Individually they would work but if I purposely created the 5 alarms so that they would all come on at the same time, I would only get every other output on. I added 4 'nop ' commands between the code for each output and the alarms worked OK. This is weird but I experienced this. Maybe you can try this to see if it solves your problem.

Created Date: November 19,2006

Created by: CLW@CrownCork

Hello everyone,

My first post here. I was writing small programs to help train a new employee. The objective was to see how many ways we could toggle a single output, with a single input.

In the following example, I used a shift register to shift a bit through the word, and had it do different pulses when on each time. No problem.

The weird thing is that the output would not respond (energize) if I only used the particular register bit that was on at the time (C10, C12, C14, C16) in the line of code for the Y0 output. I had to use another relay(C2) as the "on " bit for the output Y0.

Does anyone know why this is? I felt a bit silly when I was trying to show him something, and it didn't work at first. I told him I didn't quite understand why it didn't work without the additional relay, and would give it more thought.

Well, I did, and I still don't know. Anyone see the obvious thing I must be overlooking to help descramble my brain?

PLC 05

// Rung 1

// Address 0

STRN X0

ANDN C2

ANDN C10

ANDN C11

ANDN C12

ANDN C13

ANDN C14

ANDN C15

ANDN C16

SET C0

// Rung 2

// Address 10

STR C1

RST C0

// Rung 3

// Address 12

STR X0

OUT C1

// Rung 4

// Address 14

STR C0

STR C1

STR C17

SR C10 C17

// Rung 5

// Address 19

STR C10

OR C12

OR C14

OR C16

OUT C2

// Rung 6

// Address 24

STR C2

AND C10

STR C2

AND C12

AND SP4

ORSTR

STR C2

AND C14

AND SP5

ORSTR

STR C2

AND C16

AND SP6

ORSTR

OUT Y0

// Rung 7

// Address 39

END

#BEGIN ELEMENT_DOC

"X0 ", "PROX X0 ", " ", "Sensor "

"Y0 ", " ", " ", "Light "

"C0 ", " ", " ", "SR Data Entry Bit "

"C1 ", " ", " ", "SR Clock Pulse Bit "

"C2 ", " ", " ", "Y0 " "On " " Bit "

"C10 ", "SR BIT 0 ", " ", " "

"C11 ", "SR BIT 1 ", " ", " "

"C12 ", "SR BIT 2 ", " ", " "

"C13 ", "SR BIT 3 ", " ", " "

"C14 ", "SR BIT 4 ", " ", " "

"C15 ", "SR BIT 5 ", " ", " "

"C16 ", "SR BIT 6 ", " ", " "

"C17 ", "SR BIT 7 ", " ", "SR Reset Bit "

#END