HEIDENHAIN ND 221 B v.2 - Manual (Page 31)

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Operating parameters for measured value output
Parameter Function
P50 RS232 Baud rate
P51 RS232 Number of additional blank lines for
measured value output
Duration of measured value transfer
t
D
= [s]
RS-232-C/V.24 Data Interface (X31)
187 + (11 • number of blank lines)
baud rate
Duration of storage and measured value transfer
The time required for data transfer depends on the selected
baud rate and the number of additional blank lines.
Latch signal Storage Data transfer
after after
STX (CTRL B) † 1 ms † 37 ms
PRINT (MOD key) † 18 ms † 36 ms
Measured value output with CTRL B
If the display unit receives the control character STX (CTRL B)
over the RS-232-C/V.24 interface, it immediately transmits the
current measured value back over the interface. CTRL B is
received over the RXD line of the interface, and the measured
values are transmitted over the TXD line.
The measured value can be received and saved using a
terminal program (e.g. HyperTerminal, which is a component
of Windows
® ).
The basic program below shows the fundamental structure of
a program for measured value output.
BASIC program for measured value output over “Ctrl B”
10 L%=18
20 CLS
30 PRINT "V.24/RS-232-C"
40 OPEN "COM1:9600,E,7" AS#1
50 PRINT #1, CHR$ (2);
60 IF INKEY$<>""THEN 130
70 C%=LOC(1)
80 IF C%
90 X$=INPUT$(L%,#1)
100 LOCATE 9,1
110 PRINT X$;
120 GOTO 50
130 END