Siemens SIMATIC ET 200SP HA Manual page 21

Table 4-2
Setting
No reference channel mode
Reference channel of group 0,
1, 2, 3
Table 4-3
Setting
Reference channel of the mod‐
ule
Internal reference junction
Reference channel of group 0,
1, 2, 3
Fixed reference temperature
Diagnostics, Wire break
You can enable wire break diagnostics. When enabled, diagnostic information is output when
the module receives insufficient or no current for the measurement at the input.
You can activate the diagnostics wire break and underflow at the same time. If both diagnostics
occur simultaneously, the diagnostics wire break is output.
Diagnostics overflow
Enabling of the diagnostics when the measured value exceeds the overrange.
Diagnostics underflow
Enabling of the diagnostics if the measured value falls below the underrange.
Measurement type/measuring range
See the section Measurement types and measuring ranges (Page 24).
Temperature coefficient
The temperature coefficient depends on the chemical composition of the material.
Analog input module AI 16xTC/8xRTD 2-/3-/4-wire HA (6DL1134-6JH00-0PH1)
Manual, 05/2017, A5E39408175-AA
RTD channel
Description
Applied temperature value at Channel 15 can be used as a module-
wide reference value.
The channel acts as a transmitter for the reference junction tempera‐
ture of a group. The distribution is performed via the interface module.
Not permitted at I/O modules in IO redundancy.
TC channel
Description
The corresponding TC channel uses Channel 15 of the same module
as the reference junction temperature. This must be configured as
"Thermal resistance Pt 100 climatic range degrees Celsius" and "No
reference channel operation".
The reference junction temperature is read from the internal temper‐
ature sensors on the terminal block.
The channel acts as a receiver for the reference junction temperature
of a group.
In IO redundancy mode the reference channel of both channels has
to differ from every redundantly operating channel pair.
The reference temperature of the thermocouple is set to 0 °C. As a
result, no temperature compensation is performed.
4.3 Explanation of the module/channel parameters
Parameters
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