Cooper Bussmann BU-945U-E 802.11 DSSS user manual Modbus TCP to RTU Gateway, Serial Menu

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Cooper Bussmann Wireless Ethernet & Device Server BU-945U-E 802.11 DSSS User Manual

Modbus TCP to RTU Gateway

The Modbus TCP to RTU Gateway allows an Ethernet Modbus/TCP Client (Master) to communicate with a serial Modbus RTU Slave.

The BU-945U-E makes this possible by internally performing the necessary protocol conversion. The conversion is always performed by the BU-945U-E which is directly connected to the Modbus serial device (i.e., only this module needs to have Modbus TCP to RTU Gateway enabled).

The above example demonstrates how a Modbus/TCP Client (Master) can connect to one or more Modbus RTU (i.e., serial) Slaves. In this example the BU-945U-E Access Point is configured with the “RS232 Modbus/TCP to RTU Gateway” enabled. Once enabled, the gateway converts the Modbus/TCP queries received from the Master into Modbus RTU queries and forwards these over the RS232 port to the Slave. When the serial response to the query arrives from the Slave, it is converted to a Modbus/TCP response and forwarded via the network to the Modbus/TCP Master. If no response was received serially by the BU-945U-E within the configured Response Timeout, the BU-945U-E will initiate a number of retries specified by the configured Maximum Request Retries.

The Modbus TCP to RTU Gateway may be configured to operate on either the RS 232 or RS 485 port.

Serial Menu

RS232 / RS485 Serial Port Configuration

RS232 Port

Select the desired functionality. Select either PPP, Serial Gateway or Modbus TCP to RTU

Data Rate

The serial data rate desired. Serial data rates available range from 110bps to a maximum of 115,200bps.

Data Format

The data format desired. All the standard data formats are supported.

Flow Control

Selects CTS/RTS or None

RS232 PPP Server (Only RS232)

 

Username

User name to enter to access RS-232 PPP Server.

Password

Password to access RS-232 PPP Server.

Local IP Address

Select the IP address of the PPP server. The remote device may be made visible on the Ethernet or

 

Wireless networks by either utilizing proxy-arp or routing. The proxy-arp feature may be enabled by

 

setting the Local IP address the same as the Ethernet IP Address or the Wireless IP Address. The module

 

will respond on behalf of the remote device, making it seem like the device is present on the configured

 

network. Alternatively, if the IP address selected is not the same as the Ethernet or Wireless IP address,

 

routing is used to pass data to the Ethernet and Wireless ports.

Remote Device IP Address

Select the IP address of the remote device. Ensure this address is not the same as any other device on

 

the Ethernet or Wireless networks.

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3A1582Rev1.6

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Contents Read Retain FCC Notice Cooper Bussmann Application EngineeringPhone 800 a.m 500 p.m. Central, M-F 636 Fax 636 GNU Free Documentation License Important NoticeCooper Bussmann Contents Access Point vs Client BU-945U-E 802.11 630mW max powerNetwork Topology 3A1582Rev1.6 Bridge vs. Router Getting Started Quickly Antenna Installation GeneralLine-of-sight installations Bench test and Demo System SetupPlant and Factory Installations AntennasInstallation tips Omni-directional AntennasDirectional Antennas Power SupplySerial Connections RS232 Serial PortDB9 Connector Pinouts RS485 Serial Port3A1582Rev1.6 Discrete Digital Input/Output Start-up LED Indication Selecting a Channel802.11 900 MHz Channels 3A1582Rev1.6 Radio Throughput Data Throughput Based on Repeater HopsDefault Configuration Configuring the Unit for the First TimeAccessing Configuration for the First Time Method 1 Set PC to same network as BU-945U-E Power up the BU-945U-E moduleEnter the username user and default password user For local addresses3A1582Rev1.6 Quick Start Configuration Quick StartNetwork Configuration Configured Essid of the client Dhcp Server Configuration, Default is uncheckedWireless ports will have the same IP address Save Changes and ResetSecurity Menu Encryption keys must not be all zeros, i.e3A1582Rev1.6 Transparent Bridge Operation Radio ConfigurationNormal Operation Router OperationDrop back to non-bursting mode Bands Default is AutoSignal quality, etc Access pointDefault distance is 20km Dhcp Client ConfigurationRadio Mode BU-945U-E Only Supports the 802.11 Standard Channel SelectionDNS Server Configuration Dhcp Server ConfigurationSpanning Tree Algorithm / Redundancy Multiple AP Repeater Mesh Network 3A1582Rev1.6 Example Extending range using WDS Site B WDS ConfigurationExample Roaming with WDS Access Points Example Adding Redundancy3A1582Rev1.6 Example WDS Routed Network Mouse, to highlight the entire row WDS Connections Routing RulesSTP Specifies a destination host Wireless Message FilteringInformation at a later time 3A1582Rev1.6 IP Address Filter Configuration MAC Address Filter ConfigurationUtilize the radio link. All other devices are blocked ARP Filter Configuration Serial Port Configuration RS-232 PPP ServerSerial Gateway Server/Client/Multicast Serial Gateway Modbus Modbus RTU to TCPModbus TCP to RTU Gateway Serial MenuMulticast Pipe Manager Multicast Group IP Address Digital Input/OutputPort on the Client, i.e., Scada, DCS, etc To be the same on all communicating Multicast devicesModbus I/O Transfer 3A1582Rev1.6 Modbus TCP Configuration on I/O Transfer Menu Modbus TCP Client Mappings on I/O Transfer Menu Module Information ConfigurationModule Information Webpage Fields Remote Configuration System ToolsSetting a BU-945U-E to Factory Default Settings Configuration ExamplesExtending a Wired Network Client 2 Configuration Client 1 ConfigurationLAN B Configuration Client Configuration Access Point ConfigurationExtending Range of a Network with a Repeater Hop LED Indicator Condition Meaning Diagnostics ChartBoot Status LED Indication during Start-up RED ContinuouslyConnectivity Parameters Diagnostic Information AvailableConnectivity Site SurveyStatistics Network Traffic AnalysisConnection Information Internal Diagnostic Modbus Registers9999 Both Reset module enter Ffff to reset module 5014 STA OnlyStatistic Registers Utilities Testing Radio PathsPing 3A1582Rev1.6 Ipconfig ArpRoute Radio Transceiver Power SupplyGeneral Serial PortsSystem Parameters Input / Output statusWeb-Based Upgrade Appendix a Firmware UpgradesCSMA/CD ACKCSMA/CA DhcpIPX-SPX IeeeISN NIC SNRNAT SSLWAN VoIPVPN WEPDBm to mW Conversion Materials InstallationIperf Applications 3A1582Rev1.6 JPerf Application 3A1582Rev1.6 Preamble Terms and Conditions3A1582Rev1.6 No Warranty 3A1582Rev1.6 Customer Assistance
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