2
018-
01
50
SmartRunner Matcher*
Operation
6.4
Runtime Mode
The Runtime mode is the main mode in which the measuring process operates as configured
in the operating software.
6.4.1
Communication via the RS-485 Interface
The control panel and reader communicate via the RS-485 interface during operation. Make
sure that the basic communication settings have been made on the reader, such as setting the
reader address and baud rate.
A distinction is made between request telegrams that the control panel sends to the reader and
response telegrams that the reader sends to the control panel. Each byte of a request or
response telegram consists of 9 bits (8 data bits + 1 parity bit).
Parity Bit
A bit assigned to a binary string used to detect errors. It is added in such a way that the sum
modulo 2 of all bits that are regarded as binary digits in the string, including the parity bit, is
either 0 or 1 depending on the requirement; additional bit that is added to each string or each
byte for control purposes so that the sum of all bits containing binary 1 in the characters or
bytes including control bit results in an odd or even value.
Request Telegram
A request telegram always consists of 2 bytes. The 2nd byte corresponds to the 1st byte;
however, the 8 data bits of the 1st byte are inverted.
Structure of a Request Telegram
Meaning of bits:
R/W: 0 = response, 1 = request
Meaning of Bits
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Byte 1
R/W
Req. bit
4
Req. bit
3
Req. bit
2
Req. bit
1
Req. bit
0
A1
A0
Byte 2
~R/W
~Req. bit
4
~Req. bit
3
~Req. bit
2
~Req. bit
1
~Req. bit
0
~A1
~A0
7
6
5
4
3
2
1
0
<- Bit
Function
R/W R.4 R.3 R.2 R.1 R.0 A.1
A.0
Value
0
x
x
x
x
x
x
x
Answer
1
x
x
x
x
x
x
x
Request
1
x
x
x
x
x
0
0
Read head address 0
1
x
x
x
x
x
0
1
Read head address 1
1
x
x
x
x
x
1
0
Read head address 2
1
x
x
x
x
x
1
1
Reader address 3
1
0
0
0
0
0
x
x
0x80
Status (is alive)
1
0
0
0
0
1
x
x
0x84
Result data
1
0
0
1
0
0
x
x
0x90
Teach result
1
0
1
0
1
0
x
x
0xA8
Enable Configuration Mode
1
0
0
1
0
1
x
x
0x94
Enable Teach Mode
1
1
0
1
1
0
x
x
0xD8
Generate a software trigger
1
1
0
1
0
0
x
x
0xD0
Choose Profile
1
