Frequently Asked Questions (FAQ)

Topologies

Do we have to follow the topology rules given in the user guide?

Yes, the system has been tested with the topology rules provided. The level of and the operating characteristics of the network described in this document are based on a system designed according to these rules.

Do I have to use in the Quantum EIO system?

Yes, if you use a switch in the Quantum EIO system, use a DRS and download the appropriate predefined configuration for it. There are several DRS models available, based on the network topology.

NOTE:

DRSs are not used in a simple daisy chain loop topology.
DRSs are used in a high capacity daisy chain loop topology to support distributed I/O and sub-rings.

Can I install a 140 CRP 312 00 remote I/O head module in a sub-ring?

Yes, but the 140CRP31200 module has limited functionality in a . You cannot monitor the main ring — you cannot use the REDUNDANCY_STATUS bit in the CRP DDT.

Can I connect distributed I/O scanner devices (M340, Premium, another Quantum PLC) to distributed I/O ports or clouds or in a distributed I/O network?

We recommend that you do not add these devices to distributed I/O ports. Each distributed I/O port on / 140CRP31200 modules / •••CRA312•0 adapter modules has a bandwidth that determines how much traffic is allowed on the Quantum EIO main ring. This bandwidth limitation can cause distributed I/O scanner performance to decrease, which may be unacceptable in your network.

What type of distributed I/O devices can I connect to distributed I/O ports or clouds?

You can connect devices that do not support 802.1D/Q tagging.

Example: Advantys, TeSyS-T, Momentum, and non-Schneider devices

Can I access devices (via ping, PC tools) in a Quantum EIO network via the SERVICE port (ETH1) when it is configured in port mirror mode?

No. When the SERVICE port is configured in port mirror mode, you cannot access devices — that is, you cannot ping other devices by connecting a PC to ETH1 in port mirror mode. When the SERVICE port is configured in access mode, then you can access devices in a Quantum EIO network via any tool.

IP Addressing / FDR

Can I use the stored and clear IP rotary switch positions on the ••• CRA 312 00 adapter modules?

We recommend that you do not use these switch positions on the rotary switches because they do not support I/O module management. The only way to manage I/O modules is to use the ones and tens positions.

Ethernet Ports / Cables / Networks (Loops)

Can I connect a PC to a remote I/O module port?

Yes, but PCs will not be able to communicate with any modules. We recommend you connect PCs (or any other non-remote I/O device) to the following:

a 140CRP31200 module — DIO Cloud or DIO Sub Ring port
a 140CRP31200 module — INTERLINK port or SERVICE port configured as an access port
a •••CRA312•0 adapter module — SERVICE port configured as an access port

NOTE: Do not connect a device with a speed in excess of 100 Mbps to the SERVICE port. If the device is configured for a speed that exceeds 100 Mbps, the Ethernet link may not be established between the device and the module through the SERVICE port.

Why am I unable to communicate with my PC or other non-remote I/O device, which is connected to an Ethernet port(s) (on a DRS or a ••• CR• 312 •0 module)?

Possible cause:

The PC or other non-remote I/O device may be connected to the wrong remote I/O module port.

Possible solution:

Check that the PC or other non-remote I/O device is connected to one of the following:
- a DRS — DIO Cloud or DIO Sub Ring port
- a 140CRP31200 module — INTERLINK port or SERVICE port configured as an access port
- a •••CRA312•0 adapter module — SERVICE port configured as an access port

Why is the Ethernet link not working when I connect a PC to the SERVICE port?

Do not connect a device with a speed in excess of 100 Mbps to the SERVICE port. If the device is configured for a speed that exceeds 100 Mbps, the Ethernet link may not be established between the device and the module through the SERVICE port.

Can I change the bandwidth limitation on the distributed I/O ports?

We recommend that you do not change the bandwidth because it may affect performance in the Quantum EIO network.

ConneXium Network Manager

Why can’t I discover IMPRs? I installed the ConneXium Network Manager tool, but the IMPRs are shown as devices.

Possible cause:

You may not have the latest version of ConneXium Network Manager.
You may not have specified the GET community name while discovering the network.

Possible solution:

Install the latest version of ConneXium Network Manager or contact Schneider Electric support to get the Ethernet IMPR device types.
Add the GET community name of the IMPR before discovering the network. You can retrieve the GET community name by reading the configuration using PowerSuite. By default, the IMPR GET community name is public_1.

Why is ConneXium Network Manager taking such a long time to discover the network?

Possible cause:

The parameters you selected before discovering the network may be slowing down the process.

Possible solution:

You can speed up the network discovery by adjusting the tool discovery parameters. Please read the ConneXium Network Manager Ethernet Diagnostic Tool Reference Guide.

NOTE: If you increase the network discovery speed, you will also increase network traffic.

Why does ConneXium Network Manager display the IMPRs in a star topology when I have the IMPRs connected in a daisy chain or daisy chain loop topology?

Possible cause:

ConneXium Network Manager does not currently support daisy chain and daisy chain loop topologies. Please contact ConneXium Network Manager support to find out when these topologies will be supported.

Possible solution:

Manually edit the network topology that ConneXium Network Manager displays to create your own topology.

Why does ConneXium Network Manager say that my IP address has an invalid gateway?

Possible cause:

When you enter a gateway address, ConneXium Network Manager does 2 things:

validates that the gateway address is in the same subnet as the IP address
contacts the gateway address
- If a response is received from the gateway address, ConneXium Network Manager discovers if the address is actually a gateway/router address. If the address is not an actual gateway/router address, ConneXium Network Manager displays a detected error message.
- If no response is received from the gateway address, ConneXium Network Manager takes no action.

Possible solution:

Enter a valid gateway address.

— or —
Enter a gateway address that is in the same subnet as the IP address. Check that the gateway address is not assigned to any other device on the subnet.