Lauda RE 415 G - RS 232 Protocol; RS 485 Connecting Lead

114 / 134 ECO Gold 09/2021
“HyperTerminal” is no longer part of the operating system in Windows Vista, Windows 7, Windows 8 and Windows 10.
 With the LAUDA software “Wintherm Plus” (catalogue number LDSM2002) the RS 232 interface can be ad-
dressed.
 In the Internet there are terminal programs available as freeware. These programs offer similar functions as “Hy-
perTerminal” (for example PuTTY). Search for “serial port terminal program”.
19.3.2 RS 232 protocol
Note the following aspects:
 The interface operates with one stop bit, no parity bit and with eight data bits.
 Transfer speed alternatively: 2400, 4800, 9600 (factor setting) or 19200 baud.
 The RS 232 interface can be operated with or without hardware-handshake (RTS/CTS).
 The command from the computer must be terminated with a CR, CRLF or LFCR.
 The response from the thermostat is always terminated with a CRLF.
 After each command sent to the thermostat, it is necessary to wait for the reply before sending another com-
mand. This ensures that the sequencing of inquiries and answers is clear.
CR = Carriage Return (Hex: 0D); LF = Line Feed (Hex: 0A)
Example:
Set-value transfer of 30.5 °C to the thermostat
Computer
Thermostat
„OUT_SP_00_30.5“CRLF


„OK“CRLF
19.3.3 RS 485 connecting lead
Thermostat
9-pole Sub-D socket
Contact
Data
1
Data A (-)
5
SG (Signal Ground)
optional
6
Data B (+)
 Use screened connecting leads. Connect screen to the plug housing.
 The wires are electrically isolated from the rest of the electronics.
 Non-assigned pins should not be connected.