Rockwell Automation Publication 1444-UM001D-EN-P - June 2018 445
CIP Objects Appendix A
Trigger threshold for the main module is fixed at 2.5V.
Attribute Semantics
Tacho Source Selection
This selection defines which source to use for this tacho and speed processing
input.
0x00 defines this Tacho as disabled, multiple sources not allowed.
Selection allows theoretically that an equal source can be used for both object
instances.
21 Get V Tacho Trigger
Slope/Edge
SINT main module has
configurable edge
detection.
0: Positive
1: Negative
Rate of Change of
Speed
Group of 2 configuration
attributes.
24 Get V ROC Delta Time REAL Delta Time: The time
between speed values
that are used to evaluate
the rate of change
Range: 0.1…20 s
Default of 0.5 s
25 Get V ROC TC REAL The time constant that is
applied to the measured
speed values before they
are used for ROC
assessment
Range: 0.1…20 s
Default of 0.2 s
(are not normally
> ROC delta time)
Value Description
0 OFF
1 Local TTL Tacho Input 0
2 Local TTL Tacho Input 1
3 Tacho Bus 0
4 Tacho Bus 1
5 mapped to I/O data Speed 0 (Fixed source locations for data and OK status)
6 mapped to I/O data Speed 1 (Fixed source locations for data and OK status)
Higher Values Reserved
Table 177 - Instance Attributes (continued)
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