HEIDENHAIN ND 720 v.3 - Manual (Page 51)

51
t2
t1
t3
tD
te te
Next possible signal for measured value output: tE = t 1 + t 2 + t D + t 3 [s]
Pin 8 (0V)
Pin 12
Pin 14
Pin 8 (0V)
X10
X10
Measured
V
alue
O
utput
Measured value output over the contact and pulse inputs
Measured value output over the contact input (pin 12 on X10) and
pulse input (pin 14 on X10) can be triggered when these inputs are
closed against 0 V.
The measured values are output over the TXD line of the RS-232-C
interface.
A commercially available switch can be attached to the contact input.
This switch generates a signal for data output when it makes contact
against 0 V.
The pulse input can be triggered with TTL logic devices (for example,
SN74LSXX).
Delay times for data output
Latch signal duration: Pulse
t
e
³ 1.2 µs
Latch signal duration: Contact t e ³ 7 ms
Storage delay: Pulse t 1 £ 0.8 µs
Storage delay: Contact t 1 £ 4.5 ms
Data output follows t
2
t
2
£ 30 ms
Regeneration time t 3 ³ 0
Duration of data output in seconds:
187 • number of axes + 11 • number of line feeds
t D =
Baud rate
* 1.08
Bateil2.pm6 27.03.2002, 12:09 51