The symbols are added to the symbol table automatically and can then be used in the CFC.
Note
You can also import the list of hardware signals from an Excel file. This only works directly in
the symbol table.
6.5.4 General rules for configuring I/O modules
Introduction
In general, a channel of a module is activated only after connection of the corresponding
actuator, sensor or equivalent resistance. This approach avoids unnecessary diagnostic
messages in the PCS 7 OS during runtime.
With some modules, channels are combined into channel groups (an AI8x12Bit module with
8 channels may be comprised, for example, of 4 channel groups, each made up of 2 channels).
In this case, a group is activated as soon as one of the two channels is connected to a signal.
At least one equivalent resistance must also be connected in this case.
Analog input (6ES7331-7KF02-0AB0 in the example)
The measuring type depends on whether a transducer which is supplied with power by the
module (2-wire transducer) is operated on the AI module, or whether the transducer receives
its power from an external supply (4-wire transducer).
The setting of the measuring range module is displayed according to the configuration. This
setting must be suitable for the connected sensors and must be in place before voltage is
applied for the first time in order to avoid damaging the module.
Configuration of the hardware (AS and I/O)
6.5 Configuration of the I/O devices
Compendium Part A - Configuration Guidelines (V8.2)
118 Configuration Manual, 08/2016, A5E38166869-AA
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