Controllers
6.2 Drive functions
AT40, ATD400V, ATD400K, ATD4xxW, ATD400S, ATE250S, ATD400T
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System Manual, 06/2016, A2B00096162-AN
Signal processing
All outputs are recalculated in each processing cycle (10 ms) on the basis of the current
input signal states. The cycle's output signals are calculated exactly in the order of the Q
numbers (beginning with Q0). If the output Q22 ("NOT0") is used as the input signal of
"AND0", its output Q17 is not recalculated until the next cycle.
6.2.43.3
Digital and logical input signals
Digital input signals
Level-controlled
The controller possesses 5 digital inputs (with 30 ms debouncing), which can be combined
with any function blocks and/or can be combined directly with drive orders. Drive orders that
are assigned to the level-controlled input signals are only active as long as the assigned
digital input is active (jog mode).
Note
ATD4xxW (firmware version 1.03 or higher)
The signals of the digital inputs are additionally provided in an inverted form.
Edge-controlled
Each digital input can also be evaluated with edge control. Note that edge-controlled signals
are available for the current processing cycle only. Drive orders that are assigned directly to
the edge-controlled input signals are, therefore, "latched" automatically. "Latched" means
that the drive orders are stored and stay active until they are overwritten by another drive
order. These elements are marked as shown in Image 6-6 FBLOCK overview (Page 87).
Note
Latched drive orders are processed separately and are stored as door commands with an
associated door command expansion bit. Any other, unlatched door command apart from
"deenergized" overwrites or clears the latched drive order including the expansion bit.
