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Setting Parameters for the Reference Junction
You can set the reference junction for the 2AI TC electronics modules using the
following parameters:
Table 14-69 Reference Junction Parameters
Parameter
Module
Slot reference
IM 151-2
junction 1 to slot
reference junction
8
Input reference
IM 151-2
junction 1 to input
reference junction
8
Reference junction
2AI TC
I0 and reference
junction I1
Reference junction
2AI TC
number
Example of Parameter Assignment for Reference Junctions
• Structure: To simplify the situation, the following schematic shows only RTD
and TC modules:
Reference
junction 1
...
Figure 14-2 Example of Parameter Assignment for Reference Junctions
ET 200iS Distributed I/O Station
A5E00087831-02
Range of Values
none, 4 to 35
With this parameter, you can assign up
to 8 slots (none, 4 to 35), in which the
channels for reference temperature
measurement (calculating the
compensation value).
RTD on channel
With this parameter you specify the
0 RTD on
channel for reference temperature
channel 1
measurement (calculating the
compensation value) for the relevant
slot.
none, RTD
With these parameters, you can enable
the use of the reference junction.
1 to 8
With this parameter, you assign the
reference junction (1 to 8) containing the
reference temperature (compensation
value).
Example
Reference
junction 8
8
11
...
...
Compensation with 2AI RTD modules
Analog Electronics Modules
Explanation
15
22
...
...
34
Slot
...
14-41
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