318
Temperature Input Units
Section 7-1
7-1
Temperature Input Units
7-1-1
Temperature Input Units
A Temperature Input Unit supports a variety of functions, such as scaling and
peak/bottom hold functions. They can internally perform math operations on
temperature input values, which previously required ladder programming at a
host PLC.
Temperature data can be obtained from math operations and allocated as I/O
in combination with Temperature Status Flags or other status information. The
CX-Integrator can be used to easily allocate and monitor status information,
set Temperature Input Unit functions, and monitor data.
7-1-2
List of Data Processing Functions
The following tables list the data processing functions that can be used with
Temperature Input Units. Refer to
11-5 Temperature Input Unit Functions
for
details on functions and setting methods.
Note
Data will be undefined if default values are set using the CX-Integrator or
other Support Software.
Function
Details
Default
Moving average
Calculates the average of the past eight temperature
input values, and produces a stable input value even
when the input value is unsteady.
Moving average disabled.
Scaling
Performs scaling.
Scaling allows conversion of temperature input values
into values using the industry unit required by the user. It
reduces the number of operations requiring ladder pro-
gramming in the master PLC Unit. Scaling also supports
an offset function for compensating for mounting errors in
sensors and other devices.
Disabled
0 to 28,000
Peak/bottom hold
Holds the maximum and minimum temperature input val-
ues.
Disabled
Top/valley hold
Holds the top and valley temperature input values.
Disabled
Rate of change
Calculates the rate of change for temperature input val-
ues for each sampling period.
Disabled
Comparator
Compares the temperature input value or data after math
processing (value for peak, bottom, top, valley, rate of
change) with the four set values HH, H, L, and LL, and
indicates the result with the Temperature Status Flags.
Disabled
Input Error Detection Disable
Function
Can be used to disable detection of input errors (including
disconnection). This function is used when there are
unused inputs.
Disabled
Off-wire detection
Detects disconnections of analog inputs.
Enabled
User adjustment
Can be used to adjust the input value when an offset
occurs due to hardware errors.
Disabled
Last maintenance date
Records the date of the last maintenance in the Unit.
2008/10/1
Input temperature variation
detection function
Makes a relative comparison of two inputs and detects a
temperature difference between two inputs.
Disabled
Replace-
ment moni-
toring
functions
Temperature
integration func-
tion
Compiles the total heat exposure of a device or sensor by
multiplying the temperature and measurement time.
Disabled
Top/Valley count
function
Counts the number of heating cycles handled by a device
or application that has fixed cycles of temperature
changes.
Disabled
Temperature
Range Count
Measures how long the system is at a user-set tempera-
ture or within a user-set temperature range.
Disabled
Summary of Contents for CRT1 - 10-2008
Page 2: ...CRT1 Series CompoNet Slave Units and Repeater Unit Operation Manual Revised October 2008...
Page 3: ...iv...
Page 5: ...vi...
Page 9: ...x...
Page 15: ...xvi...
Page 23: ...xxiv Conformance to EC Directives 6...
Page 51: ...28 Slave Unit Models Section 1 2...
Page 123: ...100 Connecting External I O for Slave Units Section 3 6...
Page 365: ...342 Temperature Input Units Section 7 5...
Page 381: ...358 Expansion Unit Specifications Section 8 2...
Page 418: ...395 Repeater Unit Section 10 2 Dimensions 42 3 50 3 1 27 5 95 mm...
Page 419: ...396 Repeater Unit Section 10 2...
Page 424: ...401 CX Integrator Section 11 1...
Page 575: ...552 Current Consumption Summary Appendix D 552...
Page 581: ...558 Index...
Page 583: ...560 Revision History...