Need Help!- Read D-parameter in CNC-programme

[Ingmar Trobäck]

Can someone please advice me how to read PMC-parameter "D-type" in a NC-progamme? It´s for a Fanuc 31i.
I would like to use this external bit information in a macro, calculating variables.

Thank you!

[tmbruno28]

you can only read data parameters through your ladder programm using special instructions.So only one modification of your ladder programm can help you using window(sub 51 or sub 52 i think)

[Ingmar Trobäck]

Thank you,
I have got an answer from another source.
It turns out to be readable by using "G340 Fn. An. Qn. ;"
Where:
"F" specifies numbers of bytes:
F0.=bit, F1.=1byte, F2.=2bytes, F4.=4bytes
"A" specifies adress:
A0.=R, A1=D, A2=C, A3=K, A4=X, A5=Y, A6=F, A7=G
"Q" specifies adress number
e.g. G340 F0. A0. Q128.3 ; Reads status of R128 bit 3
G340 F2. A1. Q80. ; Reads status of D80 (2 bytes)

The value is written to macro variable #100 which can be used in the NC-programs.

Hope this will be useful to other programmers as well.

/Ingmar

[sinha_nsit]

Does it apply to 31i only?

[Ingmar Trobäck]

No.
I am quite sure it is working in Fanuc 16i/18i/30i as well.

[christinandavid]

How is your program using this data? Just curious...

DP

[Ingmar Trobäck]

In this case we thought of using some externaly set D-parameters as a code for calling up different machining programs from a network.
There is a robot loading the machine with different articles and it can set these parameters externaly. Then we can call the requested program with this code.
G340 A F Q
M198 P#100
M30

There are naturally a lot of other examples one can think of using different status of parameters, e.g. jump in programs depending on situation.

[christinandavid]

Sounds extremely complicated. I'm already up to 100 variables just to automatically time shifts and cycle processes...on one machine.

Would it be simpler to program another robot with a large whip attachment to whip the robots in question until they get their act together?

DP

[viorel26]

Where can I find more details about the G340