Setting parameters for the reference junction
You set the reference junctions for the 4 AI TC electronic modules by means of the following
parameters:
Table 13-30 Reference junction parameters
Parameter
Module
Range of values
Explanation
Slot reference junction 1 to
slot 2
IM 152
none, 4 to 35
With this parameter, you can assign up
to 2 slots (none, 4 to 35), on which the
channels for reference temperature
measurement (calculating the compen‐
sation value) are located.
Input reference junction 1 to 4
input reference junction
IM 152
RTD on channel 0
RTD on channel 1
RTD on channel 2
RTD on channel 3
This parameter allows you to set the
channel (0/1/2/3) for measuring the ref‐
erence temperature (calculation of the
compensation value) for the assigned
slot.
Reference junction E0 to ref‐
erence junction E3
4 AI TC
None
Yes
This parameter allows you to enable the
use of the reference junction.
Reference junction number
4 AI TC
1
2
Internal
This parameter allows you to assign the
reference junction (1, 2) that contains
the reference temperature (compensa‐
tion value).
Example of reference junction parameter assignments
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Figure 13-7
Example of reference junction parameter assignments
● Parameters relevant to the interface module IM 152
Parameter
Value
Slot reference junction 1
8
Input reference junction 1
RTD on channel 0
Analog electronic modules
13.9 Fundamentals of analog value processing
ET 200iSP
304
Operating Instructions, 11/2017, A5E00247483-07