Siemens ET 200S - High Feature

Analog Electronic Modules
12-51
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
Table 12-67Reference Junction Parameters for the IM151-1 BASIC, IM151-1 HIGH FEATURE
Parameters
Module Value Range Explanation
Reference Junction
Slot
IM151-1
BASIC/
IM151-1
HIGH
FEATURE
None, 2 to 12
(IM151-1 BASIC)
None, 2 to 63
(IM151-1 HIGH
FEATURE)
This parameter allows you to
assign a slot (none, 2 to 12 or 2
to 63) where the channel for
measuring the reference
temperature is located
(calculation of the compensation
value).
Reference Junction
Input
IM151-1
BASIC/
IM151-1
HIGH
FEATURE
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
2AI TC None, RTD This parameter allows you to
enable the use of the reference
junction.
Reference junction
number
2AI TC 1 This parameter allows you to
assign the reference junction (1)
that contains the reference
temperature (compensation
value).
Example of Parameter Assignment of Reference Junctions for the IM151-1
STANDARD and IM151-1 FO STANDARD
 Setup: To keep things simple, only RTD and TC modules are shown in
Figure 12-4:
2AI RTD
E0 E1
2AI RTD
E0 E1
2AI TC
E0 E1
2AI TC
E0 E1
2AI TC
E0 E1
8 11 15 22 34 Slot
... ... ... ... ... ...
Reference
junction 8
Reference
junction 1
Compensation by means of 2AI RTD modules
Example
Figure 12-4 Example of Assigning Parameters of Reference Junctions