Siemens LOGO!, Руководство пользователя

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LOGO! functions
4.4 Special functions list - SF
LOGO!
214
Manual, 04/2011, A5E03556174-01
If your LOGO! is a LOGO! 0BA7, you can additionally use the actual values of the following
functions:
●
Analog filter (0BA7 only) (Page 271) (actual value AQ)
● Average value (0BA7 only) (Page 276) (actual value AQ)
● Max/Min (0BA7 only) (Page 273) (0BA7 only) (actual value AQ)
● On-delay (Page 160) (current time Ta)
● Off-delay (Page 164) (current time Ta)
● On-/Off-delay (Page 166) (current time Ta)
● Retentive on-delay (Page 168) (current time Ta)
● Wiping relay (pulse output) (Page 170) (current time Ta)
● Edge triggered wiping relay (Page 172) (current time Ta)
● Asynchronous pulse generator (Page 175) (current time Ta)
● Stairway lighting switch (Page 179) (current time Ta)
● Multiple function switch (Page 182) (current time Ta)
● Stopwatch (0BA7 only) (Page 198) (actual value AQ)
● Analog threshold trigger (actual value Ax)
● Threshold trigger (Page 210) (actual value Fre)
Select the required function by the block number.
Parameter p (number of decimals)
Applies only to the display of On, Off and Ax values in a message text.
Does not apply to the comparison of On and Off values! (The compare function ignores the
decimal point.)
Timing diagram
$[
4
2II
2Q
Functional description
The function fetches the analog signal at input Ax.
Ax is multiplied by the value of the A (gain) parameter, and the value at parameter B (offset)
is added to product, i.e. (Ax • gain) + offset = actual value of Ax.
Output Q is set or reset, depending on the set thresholds. See the calculation rule below.