The AN-X2-AB-DHRIO Gateway is designed to help customers initiate a phased migration approach to replace or upgrade legacy remote I/O PLCs, HMIs, drives, or Flex I/O adapters. These solutions can be achieved by selecting the appropriate operating mode during initial configuration. The AN-X2-AB-DHRIO has a built-in web server that can display diagnostic data, configure, upload configuration files and set operating modes. The EtherNet/IP to Remote I/O or Data Highway Plus DH+ (AN-X2-AB-DHRIO) Gateway is designed to help customers initiate a phased migration approach to replace or upgrade legacy remote I/O, HMI or drives. The AN-X2-AB-DHRIO gateway has several modes of operation, which can be selected during initial configuration, as described below.
This mode acts as a bridge between EtherNet/IP and DH+ Data Highway Plus networks. *Programming terminals and/or processors on the EtherNet/IP network can access legacy processors on the Data Highway Plus DH+ network *Download to PLC5 or SLC via RSLinx *Configure via web browser Supports all Data Highway Plus DH+ baud rates (57.6, 115.2 and 230.4 K baud) *Communications must originate from the EtherNet/IP side, DH+ messages cannot be sent to EtherNet/IP devices *Supports DH+ upgrade to EtherNet/IP on PLC5 or SLC networks PanelViews Remote I/O Scanning Instrument Function: This mode of operation allows users to replace their existing remote I/O PLCs with ControlLogix or CompactLogix PACs without replacing the existing I/O racks. · Build new controller programs without interrupting existing control, minimizing downtime · Supports all remote I/O baud rates (57.6, 115.2, and 230.4 K baud) · Supports all remote I/O Baud rate (57.6, 115.2 and 230.4 K baud) and remote I/O addressing 0-76 octal Suitable for ControlLogix or CompactLogix Auto-configuration utility discovers baud rate and maps discrete I/O to reduce configuration errors The operating mode allows the PLC on the remote I/O to share data with newer ControlLogix or CompactLogix PACs. This mode also allows the ControlLogix processor to monitor block transfers and I/O data on an active remote I/O network without occupying a drop. · Supports up to 15 EtherNet/IP I/Os connected to a Logix processor · Supports any combination of Remote I/O rack addressing · Automatic configuration of rack addressing and baud rate web server. Web browser can view diagnostics, current configuration, upload/download configuration files and set operating mode. The AN-X2-AB-DHRIO module running Data Highway Plus (DH+) firmware uses Ethernet to connect a computer or other device to the Allen-Bradley Data Highway Plus network.
AN-X2-AB-DHRIO (DH+) Module: ⦁ Can act as any valid Data Highway Plus station number, from 0 to 77 octal ⦁ Supports all Data Highway Plus baud rates, 57.6, 115.2 and 230.4 Kbaud ⦁ Maintains Data Highway Plus Diagnostic Counters ⦁ Can route messages from Ethernet to Data Highway Plus using IP aliases (requires firmware version 4.2.1 or later) ⦁ Can route messages from Data Highway Plus to destinations on Ethernet (requires firmware version 4.7. 1 or higher) You can use the AN-X2-AB-DHRIO (DH+) module with Rockwell programming software to communicate with a PLC (eg PLC-5) via Data Highway Plus from a computer on Ethernet. See page 21 for details. You can use a DDE or OPC server on Ethernet, such as RSLinx, to access the Data Highway Plus through the AN-X2-AB-DHRIO (DH+). See page 26 for details. The AN-X2-AB-DHRIO (DH+) module has a web interface for configuring the Data Highway Plus station number and baud rate, and for monitoring diagnostic counters and a list of active stations. You can use any standard web browser to communicate with the module. The AN-X2-AB-DHRIO (DH+) module monitors the Data Highway Plus network and displays usage statistics such as overall network load, the percentage of network time spent on commands from each station, and the percentage of network time spent responding to these commands , and the amount of network time each station spends sending responses to other stations. See page 48 for details. You can use the web interface to send and retrieve various configuration files to and from the AN-X, and to update the AN-X firmware.
The watchdog timer is implemented in the hardware of the module. If the firmware does not start the watchdog within the timeout period, the watchdog times out and places the module in a safe fatal fault state.
The jabber inhibit timer is implemented in the module’s hardware. If the network transmitter is on for more than 150% of the longest network frame time, the transmitter will be forced off and the module will enter a safe fatal fault state. Hardware features The module has: ⦁ LEDs indicating the status of the Ethernet connection, its own internal status, and the connection to the Data Highway Plus network ⦁ Ethernet connector ⦁ 3-pin Phoenix connector for data connection to the Highway Plus network ⦁ Power connector ⦁ for microSD card for storing configuration data and firmware Data Highway Plus Configuration
Use the web interface to set the AN-X station number, baud rate, and the amount of data the AN-X can send when it gets a Data Highway Plus token. The baud rate can be one of 57.6, 115.2 or 230.4 kbits/sec. The station number can be in octal from 0 to 77. In firmware version 4.8 and later, the AN-X can send multiple messages when obtaining a Data Highway Plus token. When AN-X acquires a Data Highway Plus token, it always sends at least one message if it has any in its queue. If there are more messages in the queue after sending the first message, it can send at most the number of bytes configured in Token Bytes minus the number of bytes in the first message. The range of Token Bytes is 0 to 300 bytes. The default value is 250. A value of 0 disables sending other messages. Setting the token byte can improve AN-X’s performance on Data Highway Plus networks, but it will also load the destination station if AN-X sends many messages to the same destination. Monitor the No Memory NAKs diagnostic counter. If it is incrementing, it indicates that a destination has received more messages than it can handle. In this case, reduce the value of the token byte to limit the number of messages sent by AN-X. To configure the Data Highway Plus properties of the AN-X 1. Launch a web browser and enter the AN-X IP address as the URL. 2. Select Automation Network/Configure DH+ Network. 3. Select the baud rate. 4. Enter the Octal Data Highway Plus station number.
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