Good Morning ,
Also , can you guys give me a little more education , on what RPI is , and how the calculation works ? and what parameter to adjust if I want to possibly use this to ride it thru ? That is really what I'm looking more , is just 2-3 seconds to ignore a loss.
Thanks so much for your help.
From the manual located on this site:
https://literature.rockwellautomation.com/idc/groups/literature/documents/um/520-um001_-en-e.pdf
Check
parameter C141 on page 103. It is for the port / connection negotiation. They are listed as follows:
Code:
0 “Auto detect” (Default)
1 “10Mbps Full”
2 “10Mbps Half”
3 “100Mbps Full”
4 “100Mbps Half”
See if it is set to 0, indicating
"Auto detect" which is sometimes referred to as auto-negotiation. Change it. Set it to
3 for
100Mbps Full first. Do not try half-duplex settings until you have tried all full duplex speeds.
Check the speed in the module configuration. Right click the drive in Studio and there is a properties / configuration type menu. I don't have the software to take a screen shot, but it should be easy to find. Bring up that module configuration, and see what the Ethernet/IP settings on that drive are. Take note of the settings regarding negotiation and Change it to
"100Mbps Full Duplex"
There is a parameter
C126 [Comm Loss Time] on 101.
IF there is a setting like that, this would be it. It says there that it is for RS-485, but I would like to know if it is also for Ethernet/IP. Perhaps someone would chime in on that one. If not, how does Ethernet/IP do it?
Anyway, C128 is where the address settings start out.
C129-132 are for the 4 octets of the IP address. They take the format of:
Code:
C129 . C130 . C131 . C132
Having duplicate addresses will also give you problems like you are facing. My suggestion is to look at those main network parameters and figure out what that one has correct that the others don't. This may give you a lead.
Next swap the ethernet cable for the working drive over to another port. This would be a quick and dirty check to see if perhaps that ONE port is working and the others aren't.
Those steps should get you into what is happening. Basically, you want:
- The transfer rate settings to match on the PLC and drive. If both are on auto, try to set them both to a full duplex setting.
- To try the known working drive on another switch port.
- To compare address / ethernet settings between drives. All unique IP addresses. Let us know if you more detail on that.
You could very well have a bad switch, but I'm leaning towards a configuration issue somewhere. That being said, a stratix switch may very well resolve a negotiation issue as well.
Lastly, for RPI look at page 12 of this:
https://literature.rockwellautomation.com/idc/groups/literature/documents/pm/1756-pm004_-en-p.pdf
That is where the information on it starts. I would try a few quick and dirty checks first.