User Manual

LOGO! functions
4.4 Special functions list - SF
LOGO!
Manual, 06/2014, A5E33039675
207
Special function
Parameter or process variable visible in a
message text
On-/Off-delay
T
a
, TH, TL
Retentive on-delay
T, T
a
Wiping relay
(pulse output)
T, T
a
Edge triggered
wiping relay
T
a
, TH, TL
Asynchronous pulse generator
T
a
, TH, TL
Random generator
T
H
, TL
Stairway lighting switch
T
a
, T, T!, T!L
Multiple function switch
T
a
, T, TL, T!, T!L
Weekly timer
3*on/off/day
Yearly timer
On, Off
Astronomical clock
Longitude, latitude, zone, TS, TR
Stopwatch
TB, Ta, Lap, AQ
Counter
Up/down counter
Cnt, On, Off
Hours counter
MI, Q, OT
Threshold trigger
f
a
, On, Off, G_T
Analog
Analog threshold trigger
On, Off, A, B, Ax
Analog differential trigger
On, n, A, B, Ax, Off
Analog comparator
On, Off, A, B, Ax, Ay, nA
Analog watchdog
n, A, B, Ax, Aen
Analog amplifier
A, B, Ax
Analog multiplexer
V1, V2, V3, V4, AQ
Analog ramp
L1, L2, MaxL, StSp, Rate, A, B, AQ
PI controller
SP, Mq, KC, TI, Min, Max, A, B, PV, AQ
Mathematic instruction
V1, V2, V3, V4, AQ
PWM (Pulse Width Modulator)
A, B, T, Ax amplified
Miscellaneous
Latching relay
-
Pulse relay
-
Message texts
-
Softkey
On/Off
Shift register
-
Analog filter
Sn, Ax, AQ
Max/Min
Mode, Min, Max, Ax, AQ
Average value Ax, St, Sn, AQ
For timers, a message text can also display the remaining time. "Remaining time" refers to
how much time of the parameter setting remains.