Is there a way to increase the number of allowed interconnections in an R-J3? DI -> DO interconnections are currently limited to 32. Could use more to pass I/O around a DeviceNet network with the R-J3 as master. Thanks in advance.
R-J3 Interconnet
-
rtengineering -
January 4, 2023 at 4:02 AM -
Thread is Unresolved
-
-
From a Controlled Start: Menu->Next->Program Setup
Looks like there is the ability to increase the interconnections up to 64.
-
Thanks, but my system does not show Interconnections in that list, only 9 as follows:
User Tasks
Numeric Reg
Position Reg
Macros
User Alarms
Trace Length
Num. Dig. Ports
Error Severity Table
Program Adjust Table
Not sure if this is different because of the DeviceNet interface which is inactive at CTRL start (DNET-077 alarm showing).
Any idea what the system variable(s) for max interconnects would be? I haven't been able to pick it out from the listing.
Thanks
-
Try: $THRTABLENUM.[3] = 64
If it doesn't work in cold start, try to change it in controlled start.
-
Resolved
Well that was well hidden. Not sure how THR relates to Interconnect, but none the less, $THRTABLENUM[1-5 ] set the sizes for each of the 5 interconnect types. Can only write the data in Controlled Start. There does not appear to be a size limit. I tried various sizes for [3] (DI -> DO) up to 1100 and it accepted each. Settled on 256. After a Cold Start, I checked the DI -> DO setup and all 256 were available.
I have a 488 page listing with explanations of R-J3 System Variables from MARS35GEN09801E and $THRTABLENUM[1-5 ] is not there.
neighbour1,
Many thanks. That solves a nagging communications problem. Did you find that table in a listing, or was it just something that you knew?
-
I haven't found it in manual - some years ago I also needed to enlarge it and I'd just found it in variables.
-
OK. Thanks again
-
OK. Thanks again
No problem