Rs232 Port - VOLTCRAFT 1666061 Mode D'emploi

11. RS232 port

The measuring unit is fitted with a serial interface for exchanging data with a computer. This can be found on the right
hand side under the lid. The interface is in the form of a 3.5mm jack plug socket and requires a compatible data cable,
which is an optional extra.
The data cable has the following components:
Jack plug 3.5 mm mono
Centre contact →
External contact →
The serial data signal is made up of 16 Bits in the following order:
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Each data bit has the following function:
D15 Start character = 02
D14 4
D13 1
D12+D11 Displayed unit of measurement; mW/cm² = A8 (D12 = A, D11 = 8)
D10 Polarity; 0=positive; 1=negative
D9 Decimal point (DP) at the appropriate place (right to left); 0= no DP; 1 = 1DP; 2 = 2DP; 3 = 3DP
D8 to D1 Measured value (D8 = largest digit (MSD), D1 = lowest digit (LSD)). If the display shows 1234,
the following bit set (D8 - D1) will be used: "00001234"
D0 End character = 0D
The RS232 data format is: 9600, N, 8, 1
Baud rate:
Parity bit:
Data bit number:
Stop bit:
24
9600
No parity bit (N)
8
1 stop bit
9-pole Sub D socket for PC (serial port)
Pin 4
Pin 2
A 2.2 KOhm is required between pin 2 and pin 5.