GE IS220PDIIH1A Combustion engine control module

When configured for system mode, the serial port supports DF1 protocol. Use system mode to communicate with other devices on the serial link. You can select the following DF1 modes: DF1 full-duplex: provides communication between an SLC 500 controller and other DF1 compatible devices. In point-to-point mode, the SLC 500 controller uses DF1 full-duplex protocol. DF1 half-duplex master: polls and transmits messages between the master and each remote node. In master mode, the SLC 500 controller uses DF1 halfduplex polled protocol. DF1 half-duplex slave: uses the controller as a slave station in a master/slave serial network. In slave mode, the SLC 500 controller uses DF1 half-duplex protocol. DF1 radio modem: a hybrid between DF1 full-duplex and DF1 half-duplex, this protocol is optimized for use with radio modem networks.

In system mode

 the serial port also supports supervisory control and data acquisition (SCADA) applications. SCADA systems allow you to monitor and control remote functions and processes using serial communication links between master and slave locations. When configured for user mode, the serial port supports ASCII devices. Use the SLC 500 ASCII instructions to send information to and receive information from these devices.

RS-232/DF1 Port Splitters 

The 1747 Port Splitters let a single RS-232/DF1 full-duplex communication port on a controller split into two separate ports for simultaneous connection with two external devices. The Port Splitter supports the following: SLC 500, PLC-5, MicroLogix, ControlLogix, CompactLogix, and FlexLogix controllers. The Port Splitter has three ports for Controller, Network and Programmer/HMI connections. It also has a connection for a +24V external power source and status LEDs. The Controller port connects to the RS-232/DF1 full-duplex port of a controller. The port configuration is set at DF1 full-duplex, 8 bits, no parity, 1 stop bit and CRC checksum on powerup. The port automatically sets the baud rate to 19.2 K or 38.4 K

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