1 HS-output = 1: New data can be supplied.
2 Input E22 (PX 30: E14) may be set from 0 to 1 no earlier than the time at
which the data arrives (enable signal).
3 As a result of the positive-going pulse edge at E22 (PX 30: E14), new data is
read in from the PX-unit and the HS-output is automatically set at 0.
4 Only then is E22 (PX 30: E14) returned to 0. Only at this point can new data
be supplied.
5 As a result of the negative-going pulse edge at E22 (PX 30: E14), the HS-
output automatically returns to 1, but only once the data is processed
by the PX-unit. A Logic 1 signal at the HS-output signals that the unit is
ready to receive new data (see 1 ).
Operating Modes in Display Mode
The following operating modes are supported when the PX is in display mode, with both
parallel and serial drive:
• Text mode
• Variable mode
• Special mode
In text mode, texts are selected and displayed by means of their text number, which can
be either binary or BCD-coded.
Variable mode is used for the selection, evaluation and insertion of variables. Variable
transmission may be binary, BCD or ASCII-coded.
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