2 description of the machine parameters, Description of the machine parameters – HEIDENHAIN SHB Data Interfaces for HEIDENHAIN User Manual
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HEIDENHAIN Service Manual for Data Interfaces
6.1.2 Description of the machine parameters
Machine parameters - general information
Data format
As of TNC 151 B/Q the data format can be set in the machine parameter MP 222.
Example:
For "Blockwise transfer" with the HEIDEHAIN data transfer software in the EXT mode, the data
format must be as follows:
7 data bits, 1 stop bit, even parity, software handshake
In the "FE/ME" mode, the data format in MP 222 is not active; in this case the format is always
set to 7 data bits, 1 stop bit, even parity and software handshake.
MP 222 (5020)
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 7, 6
0
1
0
1
1
1
0
1
1
00
01
10
11
7 data bits (ASCII code, bit 8 = parity)
8 data bits (ASCII code, bit 8 = 0,
bit 9 = parity)
no BCC check
BCC check
Transfer stop by hardware handshake
Transfer stop by software handshake
Even character parity
Odd character parity
Character parity desired
11/2 stop bits
2 stop bits
1 stop bit
1 stop bit
7
6
5
4
3
2
1
0
Bit
1
0
1
0
1
0
0
0
Binary
128
+
32
+
8
=168
Decimal
=
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