Proline Kryomats
YAUE0007 / 2/26/2009 Starting up 85
Example:
Transfer of setpoint 30,5 °C to the thermostat
Computer Thermostat
“OUT_SP_00_30.5“CRLF
Ö
Õ
“OK“CRLF
7.13.3 Connecting cable RS 485
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 galvanically isolated from the rest of the electronics.
− Any pins not in use must not be connected!
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 operation. The bus termination is as follows:
This termination network is usually incorporated on the PC plug-in card (RS 485).
7.13.4 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)
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