QUESTION:
How do I assign the parameters of the ET 200S station if
temperature compensation of a thermocouple is to be done by a
resistance thermometer Pt100 for capturing the reference junction
temperature?
ANSWER:
The parameterization of both theIM151-1 (z.B. 6ES7 151-1AA03-0AB0)
and the 2AI TC have to match each other.
- 2AI TC: select "RTD" as reference junction and "1" as reference
junction number.
In the parameters of the IM151 header station you have to
activate the reference junction and specify the slot as well as the
channel number of the Pt100 that captures the reference junction
temperature.
Fig. 1: Operating parameters of IM151
In the parameters of the RTD module to which the Pt100 is
connected for capturing the reference junction temperature you set,
for example on channel 0 (Pt100 is connected to channel 0), the
parameter "Type/range of measurement" to"RTD-4L Pt 100 climatic
range".
Fig. 2: Parameters of the analog electronic module 2AI RTD
Fig. 3: Parameters of the analog electronic module 2AI TC
Notes:
- More information on the possibilities regarding temperature
compensation using thermo elements with ET 200S is available under
Entry-ID: 19164525.
- In contrast to IM151 (6ES7 151-1AA02-0AB0), the IM151
(6ES7 151-1AA03-0AB0) does not provide 8, but only 1
reference junction when using STEP 7 Version 5.3. Thus, the value
"1" has to be set at parameter "Reference junction number" of the
module 2AI TC ST. Spare parts are guaranteed, i. e. you will use IM
151 (...-1AA03-...) with the configuration of IM 151
(...-1AA02-...).
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german
