Horner APG XLe OCS HE-XE102-14 User Manual

Page 3

MAN0855-01-EN

Specifications / Installation

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7/22/2009 Page 3 of 4 ECN # 956

Analog Conditioning

7.1

Filter

Filter Constant sets the level of digital filtering according to the following
chart.

Digital Filtering. The illustration above demonstrates the effect of digital

filtering (set with Filter Constant) on module response to
a temperature change.

It is recommended that the filter constant for the HE-XE102-14 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.

7.2

Thermistor Linearization

Thermistors are measured using a half-bridge circuit that exhibits variable
resolution and the associated increased measurement range.

Temperature, degrees C

Resolution, degrees C

-55

1.05

-35

0.36

-15

0.17

0.11

0.1

0.13

0.22

0.30

105

0.55

125

0.85

145

1.35

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.

Load the desired linearization coefficients into a table on First
Scan using a Move Constant Data block.

Registers (Real)

Degrees C

Degrees F

R0011

-1.94454e-028

-3.50017e-028

R0013

2.40268e-023

4.32483e-023

R0015

-1.24101e-018

-2.23381e-018

R0017

3.46655e-014

6.23979e-014

R0019

-5.69403e-010

-1.02493e-009

R0021

5.62368e-006

1.01226e-005

R0023

-0.0353121

-0.0635617

R0025

163.878

326.981

Load %AI0001 into %R0001 as a Real.

Perform the Real Math Expression

%R3 = (((%R11*%R1+%R13)*%R1+%R15)*%R1+%R17)

Perform the Real Math Expression %R5 =
(((%R3*%R1+%R19)*%R1+%R21)*%R1+%R23)*%R1+%R25

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 Technical Support for an example file containing the
above program.

7.3

Thermistor types

The HE-XE102-14 with the given example ladder code supports Kele Engineering Precon Type III, 10
K

Ω

thermistors. It also directly supports the following 10 K

Ω

(Beta=3574) thermistors from Yellow

Springs Instruments (YSI).

44006 46006
44106 46031
44406 46041
44031 44907
45006 44908

8

I/O Register Map

Registers

Description

%I1 to %I24

Digital Inputs

%I32

Output Fault

%I25 to %I31

Reserved

%Q1 to %Q16

Digital outputs

%Q17

Clear HSC1 accumulator to 0

%Q18

Totalizer: Clear HSC2

Quadrature 1-2: Accumulator 1 Reset to max – 1

%Q19

Clear HSC3 Accumulator to 0

%Q20

Totalizer: Clear HSC4

Quadrature 3-4: Accumulator 3 Reset to max – 1

%Q21 to %Q32

Reserved

%AI1 to %AI4

Analog inputs

%AI5, %AI6

HSC1 Accumulator

%AI7, %AI8

HSC2 Accumulator

%AI9, %AI10

HSC3 Accumulator

%AI11, %AI12

HSC4 Accumulator

%AQ1, %AQ2

PWM1 Duty Cycle

%AQ3, %AQ4

PWM2 Duty Cycle

%AQ5, %AQ6

PWM Prescale

%AQ7, %AQ8

PWM Period

%AQ9 to %AQ14

Analog outputs

Note: Not all XLe units contain the I/O listed in this table.

Safety

This equipment is suitable for use in Class I, Division 2, Groups A, B, C and D or Non-hazardous
locations only

WARNING – EXPLOSION HAZARD – Substitution of components may impair suitability for Class
I, Division 2
AVERTISSEMENT - RISQUE D'EXPLOSION - LA SUBSTITUTION DE COMPOSANTS PEUT
RENDRE CE MATERIAL INACCEPTABLE POUR LES EMPLACEMENTS DE CLASSE 1,
DIVISION 2

WARNING – EXPLOSION HAZARD – Do not disconnect equipment unless power has been
switched off or the area is known to be non-hazardous.
AVERTISSEMENT - RISQUE D'EXPLOSION - AVANT DE DECONNECTOR L'EQUIPMENT,
COUPER LE COURANT OU S'ASSURER QUE L'EMPLACEMENT EST DESIGNE NON
DANGEREUX.

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 replace the fuse again as a repeated failure
indicates a 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.

Warning: Consult
user documentation.

Warning: Electrical
Shock Hazard.

When found on the product, the following symbols specify:

100

90
80
70
60
50
40
30

Scans

[

]

Filter
Constant