Lauda L 100 Operating Instructions Manual

Also see for L 100: Operation manual

Lauda L 100 Operating Instructions Manual Manual pdf 32 page image

Take the following information into account: With hardware handshake: When connecting a thermostat tothe PC, use a 1:1 and not a null modem cable. The RS 232interface can be connected directly to the PC using a 1:1 con-tacted cable. Without hardware handshake: Set the corresponding operationmode on the PC. Use protected connection lines. Connect theprotective screen with the connector shell. The lines are gal-vanically separated from the rest of the electronics. Do not con-nect unassigned pins. It is easy to check the RS 232 interface when it is connected toa PC with a Microsoft Windows operating system.For Windows® 3.11 with the program "Terminal".For Windows® 95/98/NT/XP with the program "HyperTerminal".For operating systems Windows Vista, Windows 7, and Windows 8"HyperTerminal" is no longer part of the operating system. Terminal programs are available on the Internet as freeware.These programs offer features similar to "HyperTerminal" (forexample PuTTY). Search query "serial port terminal program".5.11.2 Protocol RS 232Take the following information into account: Connection to SUB-D socket 9-pin The interface works with 1 stop bit, without a parity bit and with8 data bits. Transmission speed alternately: 2400, 4800, 9600 (factory set-ting) or 19200 bauds. The RS 232 interface can be operated with AND without hard-ware handshake (RTS/CTS). In order to do so, Pin 4 (DSR)and Pin 6 (DTR) and Pin 7 (CTS) and Pin 8 (RTS) must beconnected with a bridge. The command from the computer must be made with a CR,CRLF, or LFCR.CR = Carriage Return (Hex: 0D); LF = Line Feed (Hex: 0A) The response from the thermostat is always made with aCRLF. After each command sent to the thermostat, it is necessary towait for the reply before sending another command. Thisensures that the sequencing of inquiries and answers is clear.Example for set value transfer from 30.5 °C to the thermo-stat.Computer Thermostat"OUT_SP_00_30.5"CRLF"OK"CRLFOperationLOOP32