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MicroLogix 1200 Controllers
Communication
The MicroLogix 1200 controllers provide an RS-232C port. MicroLogix 1200R controllers provide an second RS-232C port that supports DF1 full-duplex protocol only. This second port lets you connect the controller to a computer running RSLogix 500 programming software or connect to an HMI device, such as a PanelView display, without removing the existing connection or requiring a network connection.
The RS-232C port available on all MicroLogix 1200 and 1200R controllers can be used for the following types of communication:
| Communication | Description |
| Point-to-point communication | • Supports direct connection of programming and operator interface devices, and supports dial-in remote programming. |
| DF1 protocol | • DF1 full-duplex, DF1 half-duplex master and slave, report-by-exception, and peer-to-peer data exchange. |
| DF1 radio modem protocol | • Transmit data efficiently through the DF1 radio modem protocol. • Each read/write transaction requires only one TX from initiator and one TX from the responder, so “key-ups” and power consumption are minimized. • For more information see the MicroLogix 1200 and 1500 Instruction Set Reference Manual, publication 1762-RM001. |
| ASCII | • A full ASCII command set for the RS-232-C port allows read and write with ASCII devices. |
| Modbus RTU master and slave protocols | • Modbus communication is supported through the RS-232-C port. |
| DH-485 communication | • Connect to a DH-485 network through an Advanced Interface Converter (1761-NET-AIC). • The DH-485 network may connect up to 32 devices. |
| DeviceNet communication | • Connect to a DeviceNet network of up to 64 devices through a DeviceNet Interface (1761-NET-DNI). • The DeviceNet Interface provides slave I/O, peer-to-peer, and program upload/download capability. |
| EtherNet/IP communication | • Connect to an EtherNet/IP network through an EtherNet/IP-to-RS-232-C interface (1761-NET-ENI, 1761-NET-ENIW). • This module supports program monitoring and upload/download, data collection, and controller peer-to-peer communication. • It can also send e-mail messages via SMTP and display status and configuration information through a built-in Internet server. |
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