Explanation Of The Module/Channel Parameters - Siemens SIMATIC ET 200SP HA Manual

Parameters

4.3 Explanation of the module/channel parameters

4.3 Explanation of the module/channel parameters
Diagnostics, Missing supply voltage L+
Enabling of the diagnostics for missing or insufficient supply voltage L+.
IO redundancy
You can configure two identical modules redundantly. To do so, plug both modules into a
redundant terminal block side by side. You can find additional information on mounting
modules in an IO redundancy configuration in the ET 200SP HA System Manual, section
"Installing", "Installing terminal block".
In IO redundancy mode, the left module is the master and the right module is the slave.
In IO redundancy mode, it is ensured that only one of the two modules is actively measuring
in the process. This means that all channels are processed alternately in the master and slave.
While channel processing is running in one module, all process values and diagnostics of the
partner module remain unchanged.
As a result, the cycle time is doubled in error-free IO redundancy mode.
Diagnostics reference junction
Enable of the diagnostics reference junction A fault in acquiring the reference temperature is
signaled as a diagnostic message of the operated TC channel.
Reference junction
You can choose from the following possibilities as the reference junction for the TC
measurement:
● A terminal block with internal temperature sensors (internal reference junction)
● The reference channel of the group 0, 1, 2, 3
● The "Reference channel of the module" if the measuring range was configured as "Thermal
resistance Pt100 climatic range" and the temperature unit as "Degrees Celsius' for
channel 15
● Fixed reference temperature (0 °C)
A possible parameter assignment is represented below:
Note
The characteristic curves of thermocouples of type B and type C are not defined below 0°C.
For this reason, the reference temperature is never below 0 °C during operation when using
type B and type C. At a reference temperature below 0°C, a valid process value cannot be
determined.
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Analog input module AI 16xTC/8xRTD 2-/3-/4-wire HA (6DL1134-6JH00-0PH1)
Manual, 05/2017, A5E39408175-AA