Leuze electronic 50113669, Manual

Page: 53 / 68

RS 485 interface
Leuze electronic AMS 301 i 50
TNT
35/7-2
4
V
Under RS 485 in the parameter menu, the output cycle for cyclically requested data can be
configured in a range of (1 … 20) x 1.7 ms.
Byte 2: XOR linking from byte 0 and byte 1
An uneven binary 1 number (calculated column by column from top to
bottom) sets the XOR bit to 1.
Example
The XOR checksum is entered by the sender (control) in the query protocol and checked
by the receiver (AMS 301
i ). A protocol is correctly transmitted when the XOR checksum of
the transmitter is equal to the XOR checksum of the receiver. If the XOR comparison is
negative (different checksums), the protocol from the AMS 301
i is not accepted. The
AMS 301 i does not send an acknowledgement to an uneven checksum.
Answer of the AMS 301 i data (response) for the CMD query from F1
h
, F4 -F6
h
, F8
h
The AMS 301 i data (response) is output in a 6 byte length.
Answer / response of the AMS 301 i
Binary coding Hex coding Function
1111 0001 F1 Request of an individual distance value
1111 0100 F4 Laser diode on
1111 0101 F5 Laser diode off
1111 0110 F6 Request of an individual velocity value
1111 1000 F8 Single request of position and velocity value
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 1 0 1 1 1 1 0 0
1 1 1 1 1 0 1 1 0
XOR 0 1 0 0 1 0 1 0
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 Laser I/O2 I/O1 ADR ADR ADR ADR
1 Ready LSR TMP ERR ATT PLB OVFL SIGN
2 D23 D22 D21 D20 D19 D18 D17 D16
3 D15 D14 D13 D12 D11 D10 D09 D08
4 D07 D06 D05 D04 D03 D02 D01 D00
5 XOR XOR XOR XOR XOR XOR XOR XOR