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5.11. Timer
The timer is enabled on the MODE configuration menu by
selecting tMEr = ON.SEC o tMEr = ON.MIN according to the
time base to be adopted.
To enable, select the function FunC on the TIMER submenu,
choosing from among:
•
ST.STP: Start/Stop timer
•
STABL: stabilization timer
•
SWITC: power-on timer
If you set both timers with function FunC=SWITC (= Start
Timer after a POWER ON), the device will switch on (with
SW start) after the time set on the shorter timer has lapsed.
When the count is on, you can see the timer value on the SV
display, on the F display, or on the bargraph by setting the
parameters dS.SP = TIM.EL, dS.F = TIM.EL or bArG = TIM.
EL, respectively.
You can assign a message to be displayed at the end of the
timer count.
When the set TIMER time is reached, you can:
•
activate an OUT1...OUT4 output configured with
F.out = TIMR1 or TIMR2,
•
go to software off with End = OFF,
•
select setpoint 2 with End = SP1-2.
Controlling timer from keyboard
In the absence of enabled digital inputs, the timer is control-
led when TIM.EL is displayed by using the
keys as follows:
•
pressed with timer stopped = START
•
pressed with timer on = STOP
•
+
pressed for 2 seconds = RESET
5.11.1. Start/Stop Timer
By selecting the options, you can alternately assign the StSt
start/ stop timer function to:
•
a digital input IN.DIG;
•
an active alarm ALRM1 or ALRM2 or ALRM3 or ALRM4
or AL.HB;
•
a serial SERIA.
You can select the true POSIT state or false NEGAT state for
the start/stop command.
With parameter rESE, you can alternately select the timer
reset mode:
•
autoreset with timer in stop AUT.RS;
•
from digital input IN.DIG;
•
from active alarm
ALRM1 or ALRM2 or ALRM3 or
ALRM4 or AL.HB;
•
a serial SERIA.
You can select the true POSIT state or false NEGAT state for
the reset command.
The timer setpoint is settable with a full-scale of 9999
seconds.
The reset function, always active on the state, resets the
Timer value and keeps it blocked even if start is present.
In the absence of enabling (stop), the autoreset condition
can be active, which resets the timer at every stop.
and
80209C_MHW_850-1650-1850_01-2020_ENG_pag. 207
The timer can also be controlled (start, stop and
reset) with Function Blocks. In this case, the
start and reset commands are in OR with the
ones defined with the StSt and rESE parameters.
The following diagrams show timer behavior when enabling
from digital input and from alarm are used.
Switching between SETP1 and SETP2 is based on the value
of the up gradient GRAD.I (if SETP2 > SETP1) or down
gradient GRAD.D (if SETP2 < SETP1).
Switching is immediate if the gradient is set to 0 (zero).
MSP1/MSP2 are managed only if the Multiset function is
enabled, as indicated in the End parameter
Enabling from digital input
IN1
Start
Stop
IN2
Reset
Timer
,
SETP2
SETP1
(*) if the auto reset function is enabled
Enabling from alarm
SP / SV
SETP1
ALRM1
SETP2
Timer
TIMER
Reset IN1
(*)
Time
TIMER
Time
Time
Time
Time
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