Allen Bradley Quest AN-X2-AB-DHRIO Remote I/O Adapter Integration and Troubleshooting

Ethernet configuration and link local access

The module is shipped with a link local address of 169.254.42.84. When configuring for the first time, the computer must be on the same subnet as the module and cannot be accessed through the router at that address. After entering the address in the browser, enter the web interface and select Administration/AN-X Configuration to set DHCP or static IP. If DHCP is selected but there is no DHCP server in the network, the module will fall back to 169.254.42.84 and repeatedly flash the red SYS light three times. Most industrial sites recommend assigning static IP addresses to avoid reconfiguring the upper software due to changes in the power on address each time. Static IP must be filled with a valid gateway address, even if there is no actual device on the gateway address. The length of Hostname is 1 to 30 characters, and the firmware must be selected as AN-X2-AB-ADPT for use with remote I/O adapters. After submission, the configuration will be written to the microSD card's config. txt file, which will take effect after restarting.

If the computer cannot access 169.254.42.84, you can run route print at the command prompt to check if there is a 169.254.0.0/16 route; If not, use route add 169.254.0.0 mask 255.255.0.0 and connect the AN-X2 network card IP address to the computer, then ping test. When multiple AN-X2 are powered on simultaneously, the initial address should be the same, and they should be connected and configured one by one. The web interface can also view ControlLogix logs, system logs, archive configurations, firmware updates, and restart modules. The browser may cache old pages, and when data is not refreshed, cache free mode or clear cache can be used.

Configure software, rack and block transfer mapping

The configuration tool AnxAbRioCfgAdpt is used to set baud rates, automatically configure, manually add or delete racks, configure block transfer modules, map I/O, save/download configurations, archive templates, and monitor diagnostics. The baud rate can be selected from 57k, 115k, 230k, or Auto. When adding a rack, you need to select the octal rack number, start/end I/O group, and Active or Monitor mode. Automatic configuration will first detect the baud rate, then listen to network packets to construct the configuration, and update and add universal BT-MODULE based on observed block transmission; It cannot recognize the specific block transmission module type, so manual confirmation of the template is required.

Before mapping, the data direction must be clearly defined: the RIO input of the Active rack is mapped to the CLX output, and the RIO output is mapped to the CLX input; The RIO input and output of the Monitored rack are mapped to the CLX input. Similarly, for block transfer, the BTR data from the Active rack is mapped to the CLX output, and the BTW data is mapped to the CLX input; The BTR and BTW of the Monitored rack are mapped to the CLX input. Mapping is based on the entire rack number and cannot map individual racks. After changing the mapping, the ControlLogix output table should be cleared to prevent accidental writing to the wrong location. The configuration tool supports automatic mapping of unassigned items, manual specification of CLX blocks and offsets, clearing mappings, and exporting RSLogix 5000 aliases. Before exporting aliases, make sure the AN-X2 checkbox is selected; If the RIO or CLX configuration changes, the alias should be re imported. Ghost Mode can be used for upgrading old systems: first monitor the old system data and timing in adapter mode, create a new ControlLogix program to compare and run, confirm that there are no errors, then switch to scanner mode, and use the exported scanner configuration to take over the RIO network.

RSLogix 5000 connection and listen only

In RSLogix 5000, first add the 1756-ENBT/A module with Major Rev set to 1, Slot set to 16, Chassis Size set to 17, Rack Connection set to None, IP address consistent with AN-X2, and Electronic Keying set to Disable Keying. Then add a 1756-MODULE universal module for each required connection, select Data-INT for Comm Format, use Slot 0 for data connection, use Slot 15 for diagnostic connection, and set Assembly Instance and Size according to the configuration. RPI can be selected between 1 and 750 ms, and should be set based on RIO scanning time and application requirements; The diagnostic connection does not require high-frequency updates and can be set to around 500 ms.

AN-X2 supports listen only connections, but listen only must rely on an exclusive owner connection, which must be multicast and not unicast. An AN-X2 can support multiple listen only connections, while the original AN-X only supported one input only connection. If using listen only, when adding a generic module, select Input Data INT for Comm Format, and connect RPI to the exclusive owner consistently. The diagnostic counter is mapped to Slot 15 and cannot be mapped to a single counter separately; Its content includes good frames, timeouts, CRC errors, noise errors, abort errors, send frames, protocol errors, rack status tables, current/average/minimum/maximum RIO scan times, scheduled I/O transmit/receive counts, and Ethernet errors. The Active rack will keep the input at 0 until the corresponding connection is established, so during debugging, it should be confirmed that all scheduling connections have been established first.