Rockwell Automation 1732E-IR4IM12R ArmorBlock Dual-Port EtherNet/IP 4-Point Thermocouple and RTD - Manual (Page 46)

38 Rockwell Automation Publication 1732E-UM004A-EN-E - July 2012
Chapter 4 Configurable Features for the Thermocouple and RTD Input Modules
• 50 Hz
• 60 Hz (default)
• 250 Hz
• 500 Hz
Digital Filter
A digital filter can be configured for each of the four channels for both
Thermocouple and RTD modules based on a configurable time constant set by
the user. The time constant value can be configured up to 10,000 ms. A value of 0
disables the filter and is the default value. The minimum digital filter value is
dependent on the selected Notch Filter as shown in the table below.
Cold Junction Compensation (1732E-IT4IM12R only)
Cold junction compensation (CJC) is the temperature at the cold, or reference,
point. This value helps determine the temperature at the hot, or measured, point.
Two mechanisms can help derive CJC:
• From a user-entered value
• From one or more thermistors attached to the module
In RSLogix 5000, the following parameters configure CJC behavior:
• Cold Junction Compensation Enable (available for each of the 4 channels)
• Cold Junction Compensation Mode (module-wide setting)
• Cold Junction Compensation Offset (available for each of the 4 channels)
Cold Junction Compensation Enable
The Cold Junction Compensation Enable box on the Module Properties
Configuration tab enables cold junction compensation on each of the four
Minimum and Maximum Digital Filter Values
Notch Filter Minimum Digital
Filter Value (ms)
(1)
(1) Setting the value as 0 disables the filter. It is the default value.
Maximum Digital
Filter Value (ms)
50 Hz
60 Hz 20 10,000
250 Hz 2 10,000
500 Hz 1 10,000
TIP Cold Junction Compensation feature is only available for a channel when
it is configured as a Thermocouple type. If a channel is set as mV (no
linearization), CJC Enable and CJC Offset are not available.