Note: The Cscape Module Setup configuration must match
the selected I/O (JP) jumper settings.
JP1 Digital DC Inputs
Positive Logic
Negative Logic
Default
Page 3
MAN0871-02 21 AUGUST 2007 PAGE 3
Specifications / Installation XLT103-10
5 Analog Conditioning
5.1 Filter
Filter Constant sets the level of digital filtering according to the following
chart.
100
%Complet e [ ]
Digital Filtering.
1
90
80
70
60
50
40
30
20
10
0
2345607
60
The illustration above demonstrates the effect of digital
Filter
Constant
100408020
Scans0
filtering (set with Filter Constant) on module response to a
temperature change.
It is recommended that the filter constant for the HE-XT103-10 be set to a
value of 7. This will minimize noise and jitter, improve effective resolution,
and provide adequate speed for most temperature monitor and control
applications.
Thermistors are measured using a half-bridge circuit that exhibits variable resolution
and the associated increased measurement range.
Best resolution is at 25°C, 77°F. With a constant 0.1°C resolution circuit, the
measurement range would only extend from –26°C to +76°C.
Linearization must be performed by the user in the ladder application code, using 26
internal %R registers per channel. The example below uses %R1-26 to linearize one
channel - %AI1. Linearization consists of the following example steps.
1. Load the desired linearization coefficients into a table on First Scan using a Move
Constant Data block.
3. Perform the Real Math Expression
%R3 = (((%R11*%R1+%R13)*%R1+%R15)*%R1+%R17)
4. Perform the Real Math Expression %R5 =
(((%R3*%R1+%R19)*%R1+%R21)*%R1+%R23)*%R1+%R25
5. Load %R0005 result into another register such as %R0007 to save the temperature
value.
Steps 2 though 5 can be on a single rung.
The expression rung may be copied, substituting %AI0002 and %R00011 for %AI0001 and
%R0007, and used to linearize the second channel. Contact Horner APG for an example file
containing the above program.
5.3 Thermistor types
The HE-XT103-10 with the given example ladder code supports Kele Engineering Precon
Type III, 10 KΩ thermistors. It also directly supports the following 10 KΩ (Beta=3574)
thermistors from Yellow Springs Instruments (YSI).
Note: Not all XLT units contain the I/O listed in this table.
Registers PWM HSC Stepper
%AQ1
%AQ2
%AQ3
%AQ4
%AQ5
%AQ6
%AQ7
%AQ8
%Q1 Run
%I30 Ready/Done
%I31
Registers
%I32 Output Fault
%Q17 Clear HSC1 accumulator to 0
%Q18
%Q19 Clear HSC3 Accumulator to 0
%Q20
PWM1 Duty
Cycle
(32 bit)
PWM2 Duty
Cycle
(32 bit)
PWM Prescale
(32 bit)
PWM Period
(32 bit)
Description
Totalizer: Clear HSC2
Quadrature 1-2: Accumulator 1
Reset to max – 1
Totalizer: Clear HSC4
Quadrature 3-4: Accumulator 3
Reset to max – 1
HSC1
Preset
Value
HSC2
Preset
Value
Start
Frequency
Run
Frequency
Accel Count
(32 bit)
Run Count
(32 bit)
Decel Count
(32 bit)
Error
Page 4
PAGE 4 21 AUGUST 2007 MAN0871-02
XLT103-10 Specifications / Installation
7. Safety
When found on the product, the following symbols specify:
Warning: Electrical
Shock Hazard.
WARNING: To avoid the risk of electric shock or burns, always connect the safety (or earth) ground before
making any other connections.
WARNING: To reduce the risk of fire, electrical shock, or physical injury it is strongly recommended to fuse
the voltage measurement inputs. Be sure to locate fuses as close to the source as possible.
WARNING: Replace fuse with the same type and rating to provide protection against risk of fire and shock
hazards.
WARNING: In the event of repeated failure, do not
defective condition that will not clear by replacing the fuse.
WARNING: Only qualified electrical personnel familiar with the construction and operation of this equipment
and the hazards involved should install, adjust, operate, or service this equipment. Read and understand this
manual and other applicable manuals in their entirety before proceeding. Failure to observe this precaution
could result in severe bodily injury or loss of life.
All applicable codes and standards need to be followed in the installation of this product.
Adhere to the following safety precautions whenever any type of connection is made to the module:
Connect the safety (earth) ground on the power connector first before making any other connections.
When connecting to electric circuits or pulse-initiating equipment, open their related breakers.
Do not
make connections to live power lines.
Make connections to the module first; then connect to the circuit to be monitored.
Route power wires in a safe manner in accordance with good practice and local codes.
Wear proper personal protective equipment including safety glasses and insulated gloves when making
connections to power circuits.
Ensure hands, shoes, and floor are dry before making any connection to a power line.
Make sure the unit is turned OFF before making connection to terminals.
Make sure all circuits are de-energized before making connections.
Before each use, inspect all cables for breaks or cracks in the insulation. Replace immediately if defective.
8 Technical Support
Warning: Consult
user documentation.
replace the fuse again as a repeated failure indicates a
Notes
Notes
For assistance and manual updates, contact Technical Support at the following
locations: