Lauda Integral T 2200 - RS 485 Interface

Integral T process thermostats
21/01/2019 / YAWE 0026 Starting up 77
Protocol:

 The interface operates with 1 stop bit, no parity bit and 8 data bits.
 Transfer rate either 2400, 4800, 9600 (factory setting) or 19200 baud as
selected.
 The RS 232 interface can be operated with or without hardware handshake,
(RTS/CTS).
 The command from the computer must be terminated with CR, CRLF, or
LFCR.
 The response of the thermostat is always terminated with CRLF.
 After each command sent to the thermostat, it is necessary to wait for the reply
before sending another command. This ensures that the sequencing of
inquiries and answers is clear.
CR = Carriage Return (Hex: 0D)
LF = Line Feed (Hex: 0A)
Example:
Transfer of setpoint 30.5 °C to the thermostat.
Computer
Thermostat
„OUT_SP_00_30.5“CRLF


„OK“CRLF
7.7.2 RS 485 Interface
Connecting cable:
Thermostat
9-pin sub-D socket
Pin
Data
1
Data A (-)
5
SG (Signal Ground)
optional
6
Data B (+)

 Use screened connecting cables.
 Connect screen to connector case.
 The connections are isolated from the remainder of the electronics.
 Any pins not in use must not be connected!