MorphuisOGrady
Member
Hi Guys,
Very strange one I've encountered that I need assistance with.
I have an CLX L-61 with 2 1756-DNB DeviceNet scanners. Every so often (approx 2-3 times per hour)a random node will dissapear off the network. It occurs mostly on Network 2 but very occasionally on network 1.
There are 55 nodes on each network comprising of DNY41R Starter Auxilarys and E3Plus Overloads. It is ALWAYS an E3 Plus that falls off network. An Error 78 will appear on relevent scanner module for 40-41 seconds every time.
I have an Alarm/Event log on my HMI which logs communications errors and this verifys my problem. Random nodes disppearing off network for exactly 41 seconds!!!!
I'm satsified that network cable lengths are well within spec, properly shielded and terminated. Power supplies are as recommended and DNet voltage levels are correct.
The baud-rate is at 125kps and I have tried increasing this to 250kps with no success.
Has anyone ever experienced this? Any suggestions on how to diagnose this problem would be great.
Very strange one I've encountered that I need assistance with.
I have an CLX L-61 with 2 1756-DNB DeviceNet scanners. Every so often (approx 2-3 times per hour)a random node will dissapear off the network. It occurs mostly on Network 2 but very occasionally on network 1.
There are 55 nodes on each network comprising of DNY41R Starter Auxilarys and E3Plus Overloads. It is ALWAYS an E3 Plus that falls off network. An Error 78 will appear on relevent scanner module for 40-41 seconds every time.
I have an Alarm/Event log on my HMI which logs communications errors and this verifys my problem. Random nodes disppearing off network for exactly 41 seconds!!!!
I'm satsified that network cable lengths are well within spec, properly shielded and terminated. Power supplies are as recommended and DNet voltage levels are correct.
The baud-rate is at 125kps and I have tried increasing this to 250kps with no success.
Has anyone ever experienced this? Any suggestions on how to diagnose this problem would be great.