Host Engineering Forum
General Category => Do-more CPUs and Do-more Designer Software => Topic started by: jwbaker3 on May 26, 2019, 10:50:07 AM
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I have 14 Yaskawa v1000 drives that I want to use explicit Ethernet messaging to operate. We are using a DoMore BRX cpu. I have bench tested one drive it works fine I can send/ receive all of the information. I am messaging using assemblies 21/71. I am connected to the network the MS light is solid green but the NS light is flashing green, All works but on any other system I use the NS light is solid green when it is on the system and working with the PLC. I called Yaskawa Tech support and they said the SI-EN3/V module may be defective However I tried two new one and the same result. I know there are some of you guys that have used Yaskawa drives (which we really like) and the DoMore (which we also like) to talk Ethernet I/P is it normal for the NS light not to be solid green, or do I have a problem. We have install thousands of the Yaskawa drives on Rockwell, GE, Modicon, etc. but this is the first DoMore with Ethernet.
Thanks for any help or insight you can give. I don't want the customer to have a problems with this setup, we talked them into the DoMore away from Rockwell and if it go well we hope to keep using DoMore in their factory.
JW
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Unfortunately, while I have done it with the D-more H2 and BRX, with the V1000, A1000 and GA800, at least bench testing, I don't recall paying attention to the NS LED.
I do know that the Yaskawa EIP may not detect a coms loss due to the PLC not talking or loss of Ethernet by pulling the cable anywhere other than switch to drive. I suspect this is due to explicit messages not leaving a connection open. I don't think I saw this with Modbus TCP. Implicit messaging doesn't have an issue either.
I recently did a Toshiba AS3 with AB and noticed it has a timeout parameter that can be set to monitor for lack of activity.
Then again, it's the weekend and I could be mis-remembering some of this.
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Maybe it's lighting up for active polling and the other PLC's are polling more rapidly than the BRX. Or maybe it indicates an open connection and the BRX is opening/comming/closing each time where the others keep it open? Maybe check the Yaskawa docs to see what the LED represents. Haven't done a whole lot of EIP except for AB <-> AB and tests with BRX, so don't really remember the protocol specifics.
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Thanks guys, I think you are correct its the explicit messaging not keep a connection with the drive. The NS light flashing green per the manual is (Operating Status) = "Online communications not established" (Remarks) = "The option is on line without an established connection" The tech support guy was surprised it was working so I sent him a video.
Thanks again,
JW