The main functionality of the BMENOC0321 control network module is to provide network transparency between a (including RIO and distributed equipment) and a control network.
Other functionality of the BMENOC0321 module:
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The module operates in a network that uses the protocol.
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The module configures IP parameters and device configuration files for I/O devices in the control network.
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The module supports functionality.
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The module scans I/O devices in the control network.
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The module operates in a network that is connected to the control network through a 1000 Mbps connection.
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The module supports IP secure communications (
IPsec).
In this M580 architecture, a BMENOC0321 control network module connects a control network to a local rack that includes a CPU and a BMENOC0301/BMENOC0311 Ethernet communication module. The BMENOC0321 module provides network transparency between the control network and the device network:
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BME•58•••• CPU connecting the local rack to the main ring
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BMENOC0301 Ethernet communication module on the local rack managing distributed equipment on the device network
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BMENOC0321 control network module
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control network
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RIO main ring
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BM•CRA312•0 (e)X80 EIO adapter module on an RIO drop on the main ring
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BMENOS0300 network option switch module on an RIO drop
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BM•CRA312•0 module on an RIO drop on an RIO sub-ring
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BMENOS0300 module on a drop in an RIO sub-ring
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DIO cloud connected to an RIO sub-ring via a BMENOS0300 network option switch module
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STB island in a DIO sub-ring connected to the main ring via a BMENOS0300 module on an RIO drop
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There are two subnets, one for the control network and one for the device network.
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The monitoring workstation on the control network can communicate with equipment on the device network through the BMENOC0321 control network module.
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The IP forward feature of the BMENOC0321 module manages Ethernet transparency between the control network and the device network.
How is the BMENOC0321 Module’s Default Gateway Used?
As previously stated, if a datagram is targeted outside of a network, the datagram is sent to the default gateway. In an M580 system, the default gateway is the BMENOC0321 module. If the datagram is not targeted to a device in one of the three networks known by the BMENOC0321 module, the datagram is sent to the BMENOC0321 module’s default gateway.
NOTE: Double-click the BMENOC0321 module in the Control Expert
PLC bus to configure the default gateway.
