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FAQs
Q1: What is the primary function of the PLX31-EIP-MBTCP?
It is a stand-alone communication gateway that enables bi-directional data transfer between EtherNet/IP controllers/devices and Modbus TCP/IP controllers/devices. It acts as a protocol converter, allowing Rockwell Automation PLCs to read/write data to Modbus TCP/IP devices and enabling Modbus TCP/IP masters to access data from Rockwell controllers.
Q2: What PLC types are supported by this gateway?
The gateway supports PLC2, PLC5, SLC, CLX (ControlLogix), CMPLX (CompactLogix), and MICROLX for EtherNet/IP communication. It uses PCCC and CIP message types, with support for PLC-2/PLC-3/PLC5 Basic, PLC5 Binary, PLC5 ASCII, and SLC500 command sets.
Q3: How many Modbus TCP/IP connections does the PLX31-EIP-MBTCP support?
The gateway supports up to 10 Modbus TCP/IP clients and 5 Modbus TCP/IP servers (MBAP) simultaneously. It supports up to 160 fully configurable client commands, with individual error codes reported for each command. Supported Modbus function codes include 1, 2, 3, 4, 5, 6, 15, 16, 22, and 23 .
Q4: Does the gateway require additional programming in RSLogix/Studio 5000?
No complex programming is required. The gateway includes an embedded EDS Add-On Profile that simplifies integration and reduces commissioning time. Configuration is performed using ProSoft Configuration Builder (PCB) software, and the module communicates with the PLC via standard EtherNet/IP I/O or explicit messaging.
Q5: What are the key diagnostic and data management features?
The gateway features data prioritization (allowing different RPIs for status and control data), SD card slot for configuration backup/disaster recovery, ProSoft Discovery Service for easy IP configuration without being on the same subnet, and module switch security (v1.04+) to prevent unauthorized configuration changes.
