Siemens IM 151-7 - Of Thermocouples; Parameterization of the Reference Junction

Functions of the IM 151-7 CPU
8-46
ET 200S IM 151-7 CPU Interface Module
A5E00058783-04
8.13 Parameterization of the reference junction for the
connection of thermocouples
If you want to use the IM 151-7 CPU in an ET 200S system with thermocouples
and reference junctions, set the following parameters in the properties section of
the hardware configuration:
Table 8-18 Parameterization of the reference junction
CPU parameter
Range Explanation
Activation of the reference
junction
Activated/not activated
Example, see
Figure 8-10
You can enable the reference junction with this
parameter. Only then can you continue to
parameterize the reference junction.
Slot None/5 to 66
Example, see
Figure 8-10
You can use this parameter to assign the RTD
module slot to the reference junction.
Channel number RTD on channel 0
RTD on channel 1
Example, see
Figure 8-10
You can use this parameter to define the
channel (0/1) for reference temperature
measurement (determining the compensation
value) for the assigned RTD module slot.
RTD module parameter Range Explanation
Measurement
type/measurement range
Resistance/temperatur
e measurement, e.g.
 RTD-4L Pt 100
standard range
If you use a channel of the RTD module for
reference junction parameterization, you must
parameterize the measurement
type/measurement range for this channel as
RTD-4L Pt 100 climatic range.
TC module parameter Range Explanation
Reference junction number 1 This parameter allows you to assign the
reference junction (1) that contains the
reference temperature (compensation value).
Reference junction channel 0
and reference junction
channel 1
None, RTD You can enable the use of the reference
junction with this parameter.