Hysteresis - Omron CJ1W-CT021 Operation Manual

Extra Functions
3-7-3

Hysteresis

Range Active
Range Inactive
Configuring Hysteresis
CNT1: CNT2:
m+63 m+108
90
An encoder can come to rest at a particular position and then "oscillate" around
this position. This state means that the Counter Value fluctuates around a partic-
ular value. If, for example, a Range Limit is in this area of fluctuation, the corre-
sponding Range would become active and inactive in the rhythm of these
fluctuations. To prevent outputs from being switched ON and OFF by very small
fluctuations, the High-speed Counter Unit offers the Hysteresis Function that can
be configured for every Counter separately. You can assign Hysteresis in a range
from 1 to 255 counts (= 0001
ation in the Counter Input Signal as a real change and outputs can be controlled
accordingly.
Lower
Range Limit
Hysteresis
15 14 13 12 11 10 9
Set Hysteresis in number of counts between 0001-0255 (= 0001
Note 1. The Hysteresis can only be applied to Units in Range Mode. If the Unit is in
Comparison Mode you are able to configure Hysteresis yourself using Compar-
ison Values.
2. Do not set the origin (i.e., a present value of 0) within the Hysteresis-Area.
3. If the Counter is Preset, turn OFF the Hysteresis. If the Counter is Preset in the
Hysteresis-Area, the Outputs will not be controlled correctly.
– 00FF
H
Down-Counting
Up-Counting
8 7 6 5 4 3 2 1
) from which the Counter treats the fluctu-
H
Upper
Range Limit
Hysteresis
0
0000 = No Hysteresis
Section 3-7
Hysteresis:
– 00FF )
H H