Lauda RP 4050 C, Руководство по эксплуатации

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102 / 137 Proline Kryomats 03/2022
This termination network is usually incorporated on the PC plug-in card (RS 485).
8.3.4 Protocol RS 485


The interface operates with one stop bit, no parity bit and 8 data bits.

Transfer rate either 2400, 4800, 9600 (Factory setting) or 19200 baud as selected.
 The RS 485 commands are always preceded by the device address. There is provision for 127
addresses. The address must always have three digits. (A000_...to A127_...).

The command from the computer must be terminated with CR.

The response of the thermostat is always terminated with CR.
CR = Carriage Return (Hex: 0D)
Example: Transfer of setpoint 30.5 °C to the thermostat with address 15.
Computer Thermostat
“A015_OUT_SP_00_30.5“CR


“A015_OK“CR
8.3.5 Write commands (Data commands to the thermostat)
Command Explanation
OUT_PV_05_XXX.XX External temperature to be set through the interface.
OUT_SP_00_XXX.XX Setpoint transfer with up to 3 places before the decimal point and up to 2 places behind.
OUT_SP_01_XXX Pump output step 1 to 8.
OUT_SP_02_XXX Operation mode cooling (0 = OFF / 1 = ON / 2 = AUTOMATIC).
OUT_SP_04_XXX.X TiH outflow temperature high limit.
OUT_SP_05_XXX.X TiL outflow temperature low limit.
OUT_PAR_00_XX.X Setting of control parameter Xp.
OUT_PAR_01_XXX Setting of control parameter Tn (5 – 180s; 181 = Off).
OUT_PAR_02_XXX Setting of control parameter Tv.
OUT_PAR_03_XX.X Setting of control parameter Td.
OUT_PAR_04_X.XX Setting of control parameter KpE.
OUT_PAR_05_XXX Setting of control parameter TnE (5 – 979 s; 980 = Off).
OUT_PAR_06_XXX Setting of control parameter TvE (0 = OFF).
OUT_PAR_07_XX.X Setting of control parameter TdE.
OUT_PAR_09_XXX.X Setting of the max. outflow temperature limit.
OUT_PAR_10_XX.X Setting of control parameter XpF.
OUT_PAR_14_XXX.X Setting of the setpoint offset.
OUT_PAR_15_XXX Setting of the control parameter PropE.