Hi all,
I'm working on a project monitoring DLR rings using explicit messaging - (Citect SCADA ABCLX driver + 1765-L62 v20.19)
Just a few questions, (first time working with DLR and don't really have enough hardware to test currently).
1.
The PLC is the supervisor, Precedence = 0, all the devices on the ring are ETAPs with 2-10 pumps in star topology.
Is there ever a situation that I would have to consider (for monitoring) when the PLC is not the Supervisor?
If i lose the PLC (Citect IO Device), the next tap will become supervisor, but no point in programming for this case as we wont be able to see anything?
2.
Get Ring Participant list:
CIP Generic: Get Attribute Single
Service Code: e
Class=0x47
Instance=1
Attribute=9
This is returning an array of SINT's (10 SINT for each node found). I was wondering is there any defined order for the list? aka, it is in order found along the network out of port 1 and into port 2 ?
I wanto compare the returned MAC address's in this list to generate "Link Faulted" Graphics.
Any documents that actually give detailed information on the DLR CIP commands would be awesome, so far the following only have examples and don't really tell the whole story:
290e-at001_-en-p.pdf - ArmorStart® DLR Reference Architecture
enet-at007_-en-p.pdf - Application Technique Ethernet IP Device Level Ring
It isn't even mentioned in the EthernetNet I/P CIP Standard: Vol2_1.28 !?!
Cheers!
I'm working on a project monitoring DLR rings using explicit messaging - (Citect SCADA ABCLX driver + 1765-L62 v20.19)
Just a few questions, (first time working with DLR and don't really have enough hardware to test currently).
1.
The PLC is the supervisor, Precedence = 0, all the devices on the ring are ETAPs with 2-10 pumps in star topology.
Is there ever a situation that I would have to consider (for monitoring) when the PLC is not the Supervisor?
If i lose the PLC (Citect IO Device), the next tap will become supervisor, but no point in programming for this case as we wont be able to see anything?
2.
Get Ring Participant list:
CIP Generic: Get Attribute Single
Service Code: e
Class=0x47
Instance=1
Attribute=9
This is returning an array of SINT's (10 SINT for each node found). I was wondering is there any defined order for the list? aka, it is in order found along the network out of port 1 and into port 2 ?
I wanto compare the returned MAC address's in this list to generate "Link Faulted" Graphics.
Any documents that actually give detailed information on the DLR CIP commands would be awesome, so far the following only have examples and don't really tell the whole story:
290e-at001_-en-p.pdf - ArmorStart® DLR Reference Architecture
enet-at007_-en-p.pdf - Application Technique Ethernet IP Device Level Ring
It isn't even mentioned in the EthernetNet I/P CIP Standard: Vol2_1.28 !?!
Cheers!