User's Manual

Lyngsoe Systems Exciter EX23G
950115B.pdf Page 4 of 7
2.2. PC Software Configuration
The simplest way to control EX23G is by using a Terminal Emulation program on the PC. The
general configuration procedure consists of:
. • Open a Terminal Emulation program on your computer (Procomm, HyperTerminal, etc).
. • Configure the computer’s COM port to which the EX23G is connected. The
default configuration for the COM port is: COM port - COM1; Data rate - 19200 bps; Data bits - 8
bits; Parity – none; Stop bits – 1; Flow control – none.
. • Use an adapter from USB to RS485 (LS PN 600057)
. • From the PC send commands to EX23G and observe the responses on the PC.
Other dedicated software can be used to control EX23G as long as the correct commands are
provided for EX23G.
3. Operation
3.1. Remote control
The operation of the Exciter EX23G is controlled by commands and parameters. The
parameters values are set into EX23G during the configuration session. This configuration is
controlled by a PC running serial communication program like Procomm, through a serial
communication link type RS485. There are several specific commands to configure or to query the
EX23G parameters values.
When EX23G is connected in a network, it shall receive a unique address called NetId. The
NetId is an integer in the range 0 to 255. Each command transmitted to an Exciter EX23G shall be
preceded by a prefix specifying its NetId and must use the following syntax:
#NetId <space><COMMAND> <CR>; the prefix #NetId is separated from the command
itself by a space.
The basic configuration of the communication network is presented in figure 3-1.
RS485 Network
3.2. LF Field Generation
The LF excitation field generated by EX23G has a 125 KHz carrier modulated with