Siemens SIMATIC S5 Equipment Manual page 16

R 02/92
For each desired reaction, a cam can be setup on a track.
The size and position of this cam can be specified by writing the respective initial setpoint A and
the end setpoint E of the cam into a data block (IP 241).
By means of the standard function block FB 156, this data block is then transferred to the 1P 241
and the module is parameterized.
During parameterization, the 1P 241 firmware internally arranges the specified initial and end set-
points into an ascending sequence of values.
This is done to obtain brief processing times when these values are processed (i.e., when the ac-
tual values from the encoder are compared with the setpoints).
Then the actual value only needs to be compared internally with the next highest and next lowest
must be considered during configuring.
Track Identifier Bits
The result of the comparison with the setpoints (cams) is presented as track identifier bit.
Within the cam, the track identifier bit is "O", outside the cam it is"1".
Example:
Actual value
4
The effects of the track identifier bits can be influenced. See next page. &
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Total track
General Function Description
Track identifier bit = 1
Track identifier bit = O
1 – 7