J
This is one of those small problems that I've been living with for about a year, trying different things to isolate/correct it periodically with no success. Now I've run out of ideas.
On one DH+ network with 7 SLC's and 4 computers with KTX cards, I have one node that the logging computers miss data from a couple of times a day.
Data is logged every hour for one application and every 1/2 hour for the other application. Normally data is missed 2-5 hours per day on the hourly and double that for the 1/2 hour app. The logging is done with FoxPro through WinLinx DDE.
The other apps rarely miss any data from other stations on the network, the diagnostics in RSLinx on my desktop show 0 errors over the course of a week or so, the messages from one SLC to the other and back run fine, I have no problems when working online with this node in RSLogix, in essence, everything looks great but we miss data.
The network is DH+ in a daisy chain configuration, about 800 feet long (max)
with terminating resistors on both ends and running at 56K. Just yesterday I changed the processor out for a brand new one and installed a UPS on the power to the rack. Last year I had a new ground driven and hooked up properly. This node is also the closest of all the SLC's to the logging computers.
Could the rack power supply be causing problems? That is one thing I haven't changed so far.
Any help is appreciated.
Darin Jett
Carbide/Graphite
On one DH+ network with 7 SLC's and 4 computers with KTX cards, I have one node that the logging computers miss data from a couple of times a day.
Data is logged every hour for one application and every 1/2 hour for the other application. Normally data is missed 2-5 hours per day on the hourly and double that for the 1/2 hour app. The logging is done with FoxPro through WinLinx DDE.
The other apps rarely miss any data from other stations on the network, the diagnostics in RSLinx on my desktop show 0 errors over the course of a week or so, the messages from one SLC to the other and back run fine, I have no problems when working online with this node in RSLogix, in essence, everything looks great but we miss data.
The network is DH+ in a daisy chain configuration, about 800 feet long (max)
with terminating resistors on both ends and running at 56K. Just yesterday I changed the processor out for a brand new one and installed a UPS on the power to the rack. Last year I had a new ground driven and hooked up properly. This node is also the closest of all the SLC's to the logging computers.
Could the rack power supply be causing problems? That is one thing I haven't changed so far.
Any help is appreciated.
Darin Jett
Carbide/Graphite