Speed Page - Allen-Bradley 1444-TSCX02-02RB User Manual

Speed Page

Parameter
Mode
Name
Speed Multiplier
Source
TTL Trigger
The Speed page parameters define the source and processing that is applied to
the two speed measurements of the module.
Figure 52 - Configure Speed Inputs
Values
Normal (0)
Redundant (1)
Blank or must start with a letter or underscore ("_"),
however, all other characters can be letters, numbers, or
underscores. Cannot contain two contiguous underscore
characters and cannot end in an underscore.
Support for values <> 1
Local TTL Tach Input 0 (1)
Local TTL Tach Input 1 (2)
Tach Bus 0 (3)
Tach Bus 1 (4)
I/O Speed 0 (5)
I/O Speed 1 (6)
Positive (0)
Negative (1)
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Configure the 1444 Dynamic Measurement Module
Comments
In Normal mode, the speed inputs are independent. In
Redundant mode, if Tach 0 is in Fault (Not OK), then Tacho
1 is used for all functions that are specified for Tacho 0.
Enter a name of up to 32 characters for the selected
tachometer.
Enter a multiplier for the Factored Speed value.
• There are two speed measurements available, Speed
and Factored Speed. This parameter is used to
calculate the Factored Speed.
• Factored Speed is used when the required speed is that
of a shaft that is mechanically connected to the shaft
to which the tachometer is applied.
Each speed measurement can be processed from any type
source.
• Synchronous measurements (Filters page) and Order
Tracking (Tracking Filters pages) require speed that is
measured from a triggered signal source, so must be
either a Local TTL or Tacho Bus source.
• I/O Speed selections require that Speed is included in
the Controller Output assembly (in Module Definition).
Trigger the measurement on the positive or negative
going side of the TTL signal.
Select Positive to trigger on the "leading edge", or
Negative to trigger on the "trailing edge".
Applicable only for speeds with a Local TTL or Tacho Bus
source.
IMPORTANT:
To be sure that there are accurate phase measurements
from any configured Tracking Filters, the trigger point on
the TTL signal must align with the trigger point on the
tachometer signal. If the TTL source is a Tachometer
Signal Conditioner Expansion (TSCX) module, then to be
sure that there are accurate phase measurements, match
this parameter to the Trigger Slope defined in the
Tachometer configuration for the TSCX.
Chapter 3
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