Data Transfer By Plc; Configuration Of Plc Data Interface - HEIDENHAIN TNC 415 Technical Manual

4 Data transfer by PLC

Using PLC modules (for description see the section on "Data Transfer by PLC" in the "PLC
Programming" Manual), data can be transferred by the PLC via the RS-232-C/V.24 or RS-422/V.11
data interfaces. These modules, for example, permit communication between two logic units at PLC
level via the interface. One application of this type of data transfer is the positioning module, which
is described in detail in the "Positioning Module" Manual.

4.1 Configuration of PLC data interface

4.1.1 General
When data is transmitted by the PLC, use of the interface is inhibited by the input/output program of
the user interface. The user has the possibility of configuring the PLC interface according to the FE1,
FE2 or ME mode already described, from the RS-232-/RS-422 setup, or to configure it freely.
However, the following limitation applies:
A configuration at 19,200 baud is impossible if the other interface is already configured at 38,400
baud, regardless of whether this interface is assigned to the PLC or NC.
4.1.2 Free configuration
As with the interfaces EXT1 and EXT2 of the NC, the EXT3 PLC interface is also freely configurable.
The appropriate control characters and the data format for EXT3 are set in the machine parameters
MP5xxx.2, which are described in detail in section 2.6.2 "Freely configurable interfaces". In addition,
the baud rate for transfer can be selected via MP5040.
MP5040 Data transfer rate in operating mode EXT3 (data transfer via PLC)
Entry : 0 to 9
0 = 110 baud
1 = 150 baud
2 = 300 baud
3 = 600 baud
4 = 1200 baud
01.98 TNC 407/TNC 415/TNC 425
5 = 2400 baud
6 = 4800 baud
7 = 9600 baud
8 = 19 200 baud
9 = 38 400 baud
4 Data transfer by PLC 8-47