dbh6
Lifetime Supporting Member
Hello All,
I will be commissioning a devicenet network using RS networx for devices that are currently existing on an MCC. The devices are really just E3 plus solid state overload relay's each already having its own node address.The system is already up and running. The PLC is a control logix 5561 CPU with a 1756 DNB scanner module. I wanted to get a couple of things verified, and of course always make sure your wiring is correct, make sure your using terminating resistors at the furthest ends of the network to avoid reflections of waves, using a power supply rated for device net etc. The goal is to get the data from the devices to my scanner module which will then store data to my controller tags.
So here are my questions...all these questions pertain to RS networx's for device net.
1. RsNetworx for device net gives you the ability to upload from the network, their is a Network tab through which you can upload/download to and from the network. So i wanted to know what it means to download to the network what are you downloading to??
2. If you wanted to change the node address of the device assuming the appropriate dip switches or settings are set on the device to accept software changes, if you right click on any node you can change the node address, for the change to truly take effect do you have to power cycle your scanner module and the device or do those changes take effect on the fly??
3. For the scanner module to really go out and search the network you have to configure the scan list with the scanner. Having said that if you are in the scan list tab, their are a list of available devices on the left and by selecting the arrow to the right you can add all the available devices to the scan list. Once you do that their is a download to scanner button, which downloads the scan list to the scanner. So i want to know the difference between the download to scanner button which is in the scan list and the download to network option in the network tab.
4. Their was an instance when i downloaded to the scanner module and all the devices on the network faulted through which i fixed by power cycling the devices, do you know what might cause that?
5. Lastly, once i have the scan list configured and downloaded to the scanner, their is a Local:3:O.CommandRegister.Run bit through which you have to enable to get your scanner to browse the network is that correct?
That should be it, and of course if i have left something out that's vital please let me know.
I will be commissioning a devicenet network using RS networx for devices that are currently existing on an MCC. The devices are really just E3 plus solid state overload relay's each already having its own node address.The system is already up and running. The PLC is a control logix 5561 CPU with a 1756 DNB scanner module. I wanted to get a couple of things verified, and of course always make sure your wiring is correct, make sure your using terminating resistors at the furthest ends of the network to avoid reflections of waves, using a power supply rated for device net etc. The goal is to get the data from the devices to my scanner module which will then store data to my controller tags.
So here are my questions...all these questions pertain to RS networx's for device net.
1. RsNetworx for device net gives you the ability to upload from the network, their is a Network tab through which you can upload/download to and from the network. So i wanted to know what it means to download to the network what are you downloading to??
2. If you wanted to change the node address of the device assuming the appropriate dip switches or settings are set on the device to accept software changes, if you right click on any node you can change the node address, for the change to truly take effect do you have to power cycle your scanner module and the device or do those changes take effect on the fly??
3. For the scanner module to really go out and search the network you have to configure the scan list with the scanner. Having said that if you are in the scan list tab, their are a list of available devices on the left and by selecting the arrow to the right you can add all the available devices to the scan list. Once you do that their is a download to scanner button, which downloads the scan list to the scanner. So i want to know the difference between the download to scanner button which is in the scan list and the download to network option in the network tab.
4. Their was an instance when i downloaded to the scanner module and all the devices on the network faulted through which i fixed by power cycling the devices, do you know what might cause that?
5. Lastly, once i have the scan list configured and downloaded to the scanner, their is a Local:3:O.CommandRegister.Run bit through which you have to enable to get your scanner to browse the network is that correct?
That should be it, and of course if i have left something out that's vital please let me know.
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