Switching The Message Texts And Switching The Outputs - Siemens LOGO! 8 Manual

4 Mode of operation
4.2.1

Switching the Message texts and switching the outputs

Each LOGO! output is assigned to a message text that describes the respective
output function, as
The message texts are in turn activated by a forward and backward counter
connected upstream.
In the figure, the counter [B096] switches at the 19th pulse of key [F4] (=counter
value On: 19) on and at (counter value Off: 20) off again.
If you press [F1] to switch on the output, the self-latching relay [B100] is activated
via the AND block [B099] and thus the output [Q19] is switched on.
If you continue actuating the [F4] key, output [Q19] remains active through the self-
latching relay and is only deactivated by a reset signal [F2].
Output [Q19] is alternately switched on and off via digital input [I19]. When an input
is activated, the self-retaining relay [B217] is set via the rising flank at AND block
B218] and [Q19] is switched on. The self-retaining relay is reset by a further flank.
You can access the windows for parameterizing the blocks by double-clicking on
the respective block.
Figure 4-3: Switching function of the message texts
LOGO! 8 TDE Central control for individual switching of general consumers
Entry ID: 109755864, V1.0,
Figure 4-3 shows.
04/2018
14