Analog electronic modules
4.3 Basics of Analog Value Processing
ET 200S
Manual, Edition 10/2005, A5E00514527-01
4-21
Parameter assignment of the reference junction for the 2AI TC and the interface module
You set the reference junctions for the 2AI TC electronic modules by means of the following
parameters:
Table 4-26 Reference junction parameters
Parameters
Module
Range of values
Description
Reference junction slot
IM 151
None, 2 to 12
(IM151-1 BASIC)
None, 2 to 13
(IM151-1 COMPACT)
none, 2 to 63
(IM151-1 HIGH
FEATURE,
IM151-1 STANDARD,
IM151-1 FO STANDARD)
A slot with the channel for measuring
the reference temperature (determining
the compensation value) can be
assigned with this parameter.
Reference junction input
IM 151
RTD at channel 0
RTD at channel 1
This parameter allows you to set the
channel (0/1) for measuring the
reference temperature (calculation of
the compensation value) for the
assigned slot.
Reference junction E0 and
reference junction E1
AI TC
None, RTD
This parameter allows you to enable
the use of the reference junction.
Reference junction number
AI TC
1
With this parameter, you assign the
reference junction (1) containing the
reference temperature (compensation
value).
Example of assigning parameters of reference junctions
Setup: For simplification, only RTD and TC modules are shown in the following figure:
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Figure 4-2
Example of assigning parameters of reference junctions
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