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Cooper Bussmann Wireless Ethernet & Device Server BU-945U-E 802.11 DSSS User Manual
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3A1582Rev1.6
RS232 / RS485 Serial Gateway
Serial Gateway Mode
Server
Module will wait for a connection to be initiated by a remote Client.
Client
Module will automatically attempt to connect to the specified remote server.
Multicast
Allows point to multi-point serial transfer. All members of the group will receive serial
transmissions made by any other member of the Multicast group.
Modbus
Allows a serial Modbus RTU Client (Master) to connect with a single Ethernet Modbus TCP Server (Slave)
Character Timeout
Enter the maximum delay (in msec) between received serial characters before packet is sent via network.
Packet Size
The number of received bytes that will be buffered before a packet is sent via the network.
Listen Port (Server)
Server Only. Enter the TCP port number on which the server must listen for incoming connections.
The standard TELNET port is 23.
Remote Device Port (Client)
Client only. Enter the TCP port number of the remote server
(i.e., the remote port to automatically connect to).
Remote Device IP Address (Client) Client only. Enter the IP Address of the remote server
(i.e., the remote IP Address to automatically connect to).
Multicast Group Port
Enter the UDP port number that all members of the group will use (i.e., all group members should
use the same port number).
Multicast Group IP
Enter a valid Multicast IP Address identifying the group (i.e., all group members should use the same
Multicast Group IP Address). Valid Multicast IP Addresses are in the range
224.0.1.0 to 238.255.255.255.
Modbus Server Port
This is the Server Port of the local server that a remote client will connect to.
Modbus Server IP Address
This is the IP Address of the local server that a remote Client will connect to.
RS232 / RS485 Modbus TCP / RTU Converter
Modbus Server TCP Port
Port number used for the Modbus TCP – Standard port is 502.
Pauses Between Requests
Enter the delay between serial request retries in milliseconds
Response Timeout
Enter the serial response timeout in milliseconds – a serial retry will be sent if a response is
not received within this timeout.
Connection Timeout
Enter the TCP connection timeout in seconds – if no Modbus/TCP data is received within this
timeout then the TCP connection will be dropped. Set this field to zero for no timeout.
Maximum Request Retries
Enter the maximum number of request retries performed serially.
Maximum Connections
Enter the maximum number of simultaneous TCP connections to the server allowed.
Multicast Pipe Manager
Previously it has been difficult to connect a single TCP device, i.e., a Scada / DCS system to multiple remote multicast serial devices.
Multicast Pipe allows this type of connection.
Example: A Scada system that needs to communicate with multiple remote serial devices. A modem can be placed at each remote location and
connected serially to each device. A multicast pipe is configured to communicate with all devices using a multicast address and port,
i.e., 224.0.1.1:5000.
The Scada then communicates with the remotes via the IP address of the Multicast Manager and the port selected in the configuration, i.e., 5001.