2
0
2
0
-0
9
20
Process Data Structure
A Mathematical Generalization for this Relationship
•
Singleturn resolution = Config - ST Resolution = number of measuring steps per revolu-
tion
•
Multiturn position = number of full revolutions already completed
•
Modulo corresponds to the remainder function
•
A mod B = remainder of division A / B
•
Where if A is less than or equal to B: A mod B = 0
For the purposes of simplification, "remainder of division ..." is subsequently abbreviated
as simply "remainder."
[Measuring steps per revolution] x [multiturn position] + remainder = [MDC1 - position]
[MDC1 - position] mod [measuring steps per revolution] = remainder of division [MDC1 - posi-
tion] / [measuring steps per revolution]
([MDC1 - position] - remainder) / [measuring steps per revolution]) = [multiturn position]
If [MDC1 - position] - remainder
[measuring steps per revolution]
—
([MDC1 - position] -
remainder) / [measuring steps per revolution] = 0 by definition)
Taking the sample numbers from above, the result is:
•
Singleturn resolution = Config - ST Resolution = MDC1- ST Resolution = number of mea-
suring steps per revolution = 1000
•
Multiturn position = number of full revolutions already completed = ?
1000 x ? = 1875
1875 mod 1000 = remainder of division 1875 / 1000
—
875
(1875 - 875) / 1000 = ? equates to ? = 1
—
The rotary encoder has completed one full revolution. It is currently 875 steps into the next
revolution.
5.4
SSC1 - Switching Signal 1
Switching Signal Channel 1
The "SSC1 - Switching Signal 1" process data content refers to a signal bit used to detect a
position that is critical for the application. It is part of the cyclic signal transmission. The signal
bit can toggle between "0" and "1" depending on the status of the absolute rotary encoder or of
the application.
The following parameters influence the switching characteristics of the SSC1 process data:
•
SSC1 Param. SP1
•
SSC1 Param. SP2
•
SSC1 Config. Logic
•
SSC1 Config. Mode
•
SSC1 Config. Hyst