HEIDENHAIN ND 287 User Manual - Manual (Page 97)

ND 287
97
II – 3 S
w
itc
h
ing inputs and outputs
Sorting limits
If the measured value exceeds the sorting limits, the ND activates the
outputs at pin 17 or pin 18 (see "Sorting and tolerance checking" on
page 58).
Example: See figure at upper right.
 1
: Lower limit
 2
: Upper limit
 3
: Measured value < Lower sorting limit
 4 : Measured value > Upper sorting limit
Trigger signal for error
The ND constantly monitors the measuring signal, the input
frequency, the data output, etc., and displays an error message if it
detects an error. If errors occur that seriously influence measurement
or data output, the ND activates the output at pin 19. This feature
allows monitoring of automated processes.
Zero crossover
If the display value is zero, the ND activates the output at pin 14. The
minimum signal duration is 180 ms.
Fig. II.63 Sorting limits
Fig. II.64 Trigger signal for error
5
: Time
Fig. II.65 Zero crossover;
6
: Direction of traverse;
7
:
Path
1 1 1 2
1 3
1 4
ERROR xx
1 5
1 6
1 7