search

st-one-io / node-red-contrib-s7

A Node-RED node to interact with Siemens S7 PLCs
GNU General Public License v3.0
111 stars 58 forks source link

Lot of Variables #45

Closed serd91000 closed 4 years ago

serd91000 commented 5 years ago

Hi,

I tried to import Variables and their address in CSV file. there are approximativly 20 000 variables. it is possible with your node. because When I tried, your node Collect the data of 4 or 5 variables and there was not the correct result. My question : what is the correct way to collect a large number of variable? I make a wireshark capture to see the packet and data send to plc for collecting.

gfcittolin commented 5 years ago

Hi,

There shouldn't be any limit on how many variables you're able to read. The only thing is that the larger the amount of variables (and their sizes), the longer it will take to read all of them, and therefore you can't have cycle times shorter than this amount of time.

I didn't understand, what does happen when you put only a few variables? Does it work? One thing that may happen is, if there's any error on any variable (wrong address, syntax, etc.), the whole reading cycle will fail. So maybe you can double-check your variable list for such mistakes

gfcittolin commented 4 years ago

Closing due to lack of activity. Please feel free to reopen the issue if needed