Protocol Rs 485; Write Commands (Data Commands To The Thermostat) - Lauda PROLINE P 5 C Operating Instructions Manual

This termination network is usually incorporated on the PC plug-in card (RS 485).

8.3.4 Protocol RS 485


Example:

8.3.5 Write commands (Data commands to the thermostat)

OUT_PV_05_XXX.XX
OUT_SP_00_XXX.XX
OUT_SP_01_XXX
OUT_SP_02_XXX
OUT_SP_04_XXX.X
OUT_SP_05_XXX.X
OUT_PAR_00_XX.X
OUT_PAR_01_XXX
OUT_PAR_02_XXX
OUT_PAR_03_XX.X
OUT_PAR_04_X.XX
OUT_PAR_05_XXX
OUT_PAR_06_XXX
02/2022
 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 485 commands are always preceded by the device address. There is provision for
127 addresses. The address must always have 3 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)
Transfer of setpoint 30.5 °C to the thermostat with address 15.
Computer
„A015_OUT_SP_00_30.5"CR

Command
Proline heating thermostat
An RS 485 bus always requires bus termination in the
form of a termination network which ensures a defined
rest status in the high-resistance phases of bus opera-
tion. The bus termination is as follows:
Thermostat

„A015_OK"CR
External temperature given via interface
Set value transfer with max. 3 places before the decimal point and max. 2
places after it
Pump power level 1 to 8
Operation mode cooling (0 = OFF / 1 = ON / 2 = AUTOMATIC)
TiH outflow temperature limit, high limit
TiL outflow temperature limit, low limit
Setting of control parameter Xp
Setting of control parameter Tn (5 — 180 s; 181 = Off)
Setting of control parameter Tv
Setting of control parameter Td
Setting of control parameter KpE
Setting of control parameter TnE (5 — 979 s; 980 = Off)
Setting of control parameter TvE (0 = Off).
Explanation
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