3.2.5 Controlling a digital output via the output buffer
The outputs of the instructions can be output via digital outputs once they have been defined
as general (global) signal sources.
The following signal sources can be selected for the parameters of the digital outputs.
Outputs of Instructions as signal sources for digital outputs
Operation Mode Digital Output
Non-negated Negated
PLC output buffer 1
80 180
PLC output buffer 2 81 181
PLC output buffer 3 82 182
PLC output buffer 4 83 183
Example: Selection of signal source for digital output:
The output signal of an instruction is to be output via a digital output.
The output of the instruction must be defined as a general (global) signal source:
• Select an output buffer for the output of the instructions (e.g. 4).
As a result, the signal source is generally (globally) available for processing by other device
functions and has the logic state of the output of the instruction. You can also select another
output buffer.
For a digital output, choose the general (global) signal source which contains the output value
of the instruction:
• For the parameter of a digital output choose the PLC output buffer signal (e.g. "83 PLC
output buffer 4").
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