Global data - is it bits or bytes

Wilso

Member
Join Date
Nov 2012
Location
Newcastle
Posts
144
>MB1150:20 (on PLC0)
to
MB1150:20 (on PLCA)

I know that it starts at address M1150.0.

Is that the next 20 bits, or the next 20 bytes?

Cheers
 
If it is bytes, then the programmer has reserved bits from M1150.0 to M1169.7 for global data tranfer.

If it's bits, then the programmer has reserved bits from M1150.0 to M1152.3 for global data transfer.

In the latter case, why would anyone do it that way? Cutting off the reservation half way through a byte?

PS. Electrician - not an engineer or programmer.
 

Similar Topics

Hi, I was trying to restore a .cab file and it was stuck at 70% - restore global data for nearly 2 hours. What should I do from here? I just...
Replies
2
Views
1,506
Hi I am passing data between 2 x 90-30 PLCs over ethernet using Global Data. This works well using Produced and Consumed data. Is there a way to...
Replies
3
Views
1,549
Hey guys, I"m at the point in my project with RX3i controllers that I need to get comms working between two PLCs via EGD, and it's been an...
Replies
15
Views
4,059
Just a quick question I can't find an answer on yet. I have created my own recipe structure using a Global DB and when I came in this morning...
Replies
2
Views
2,016
Good day all! I am to communicate two S7 300 CPUs via MPI and I wish to accomplish this using MPI global data. So what I did was setup the GD...
Replies
3
Views
1,919
Back
Top Bottom