AMCI NEXUS NX2A4E2, User Manual

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NX2A4E2 User Manual
NX2A4E2 I
NTRODUCTION
11
NX2A4E2 Programmable Parameters (continued)
Single Turn Parameters (continued)
Linear Offset
The Linear Offset parameter changes the range of count values output by the unit and is used when the trans-
ducer position directly correlates to a linear measurement that does not start at zero. One such example is an
overhead crane. Another example is a press shut height measurement.
As an example of how the Linear offset works, when the Full Scale Count is set to 1,500 and the Linear Offset
is set to zero, the NX2A4E2 will output position values from 0 to 1,499. If the Linear Offset is changed to
100, then the unit will then output values from 100 to 1,599.
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The default Linear Offset is zero.
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For single-resolver channels, the Linear Offset range is 0 to (32,767 – Full Scale Count).
Preset Value
The transducer position can be set to any value within the range of Linear Offset to (Linear (Full
Scale Count – 1)). This parameter sets the value the transducer position is set to when the host controller
issues the Apply Preset command. This parameter has a factory default value of zero.
Multi-turn parameters
These parameters are available when the module is used with dual resolver, multi-turn transducers.
Transducer Type
This parameter defines the type of dual resolver transducer attached to the NX2A4E2. This parameter has five
values: 100, 180, 1,000, 1,800, and 128. The 100, 180, 1,000, and 1,800 values program the module to inter-
face with AMCI vernier style transducers. The 128 value programs the module to use reduction style trans-
ducer such as those available from AVG/Autotech. The
Resolver Type parameter determines the type of
resolver used with the NX2A4E2 and affects the values that can be programmed into this parameter.
Number of Turns
This parameter defines the number of turns the transducer shaft must complete before the position value
returns to zero. The acceptable values are dependant on the value of the Transducer Type parameter.
Table R1.1 Number of Turns Parameter Settings
Full Scale Count
This parameter allows you to set the number of counts reported by the NX2A4E2 over the programmed Num-
ber of Turns. This parameter has a range of 2 to (4,096 * Number of Turns) for 100, and 180 turn transducers
and 2 to (409.6 * Number of Turns) for 1,000 and 1,800 turn transducers. For 128 turn transducers, the range
is 2 to (1,024 * Number of Turns). As an example, assume an HTT-20-180 transducer and the programmed
Number of Turns is 36. The range of the Full Scale Count Parameter is 2 to 147,456. (4,096*36)
Transducer Type
Parameter Setting
Number of Turns
Acceptable Values
100 1, 2, 4, 5, 10, 20, 25, 50, 100
180
1, 2, 3, 4, 5, 6, 9, 10, 12, 15,18, 20, 30,
36, 45, 60, 90, 180
1000 10, 20, 40, 50, 100, 200, 250, 500, 1,000
1800
10, 20, 30, 40, 50, 60, 90, 100, 120, 150,
180, 200, 300, 360, 450, 600, 900, 1,800
128 1, 2, 4, 8, 16, 32, 64, 128