Interfaces
- 24 -
8.5
Interface RS422 (Option 420) & RS232 (Option 230)
Depending on the order specification the encoder can be equipped with a RS422 (option “420”) or RS232
interface (option “230”). Both versions use the same protocol and differ only in their level height.
The data transmission has the following format:
1 Start Bit / 8 Data Bits / 1 Stop Bit / No Parity
Data protocol:
The actual value is transmitted with 9600 bit/s, 8 data bits, 1 stop bit, without parity bit in the following format:
02h STX
xxh
ABS data MSB
xxh
ABS data
xxh
ABS data LSB
03h ETX
00h
0Dh
The scanned absolute position is shown binary with 0.01 mm resolution in the 3 ABS data bytes.
Other protocols are available on request.
Table 5: Bit rate RS422 (option420) and RS232 (option 230)
Position
Baud rate
8
9600 bit/s
9
600 bit/s
A
1200 bit/s
B
2400 bit/s
C
4800 bit/s
D
19200 bit/s
E
38400 bit/s
F
115200 bit/s
REMARK!
No coding switches are accessible on the sensor housing with M9 round
connector. Therefore, please specify the desired configuration when ordering!
RS422: Further an addressable version is available as option “A20” (
Standard
9600 bit/s, 8 data bits, 1 stop bit, no parity
7 Bytes, 02 MSB MSB-1 LSB 03 00 0D
binary position value
STX ETX
Bit rate
0
4
8
C
