Super Systems 31095 - Page 38

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4 - Operation
TIMER COUNTING MODES
A - Counting start time inside the band,
end in control mode.
The time counting starts only when the error
is inside a ±1 digit band. The control action
is not affected by the Timer function.
C - Counting start time = timer launch
time, end in control mode.
The time counting starts when the timer is
launched. The control action is not affected
by the Timer function.
B - Counting start time inside the band,
end with control output forced to zero.
The time counting starts only when the error
is inside a ±1 digit band. At the end, the con-
trol output is forced to zero [1].
tdop = 1
tdop = 0
Timer start
counting
Time
elapsed
#tiMe
Timer
launch
Process
variable PV
Output OP [2]
OP3
±tbs
band
#t.Mod = 2
Reset
±tbr band
SP
OP3
Timer start
counting
Time
elapsed
tdop = 1
tdop = 0
#tiMe
Timer
launch
Setpoint
OP3
#t.Mod =3
Process
variable PV
Output OP [2]
±tbs
band
Reset
±tbr band
SP
OP3
OP = 0
tdop = 1
tdop = 0
#tiMe
Timer
launch
SP
Process
variable PV
Output OP [2]
#t.Mod = 4
OP3
Reset
OP3
OP = 0
Notes
[1] When the Timer is not running the control output is forced to zero.
[2] When the PID enable parameter is set to “0” (PID disabled) the OP output is set to “0”.
4.4.4.2 TIMER FUNCTION
X5-SSI-uk 18-03-2009 17:53 Pagina 38