Soft-Start Function - Tecnologic TLK 31 D Bedienungsanleitung

In this case at the end of the cycle all the ramps won't be more
active.
P V
[ U n i t ]
S P 1
S L o r
Examples with starts from values lower than SP and with
decreasing of SP.
Note: In case of PID control, if Auto-tuning is desired whilst the
ramp function is active, this will not be carried out until the tuning
cycle has been completed. It is therefore recommended that
Auto-tuning be started avoiding activating the ramp function and,
once the tuning is finished, deactivate Auto-tuning ("Auto" = OFF),
program the desired ramp and, if it automatic tuning is desired,
enable the Self-tuning function.

4.10 - SOFT-START FUNCTION

All the parameters referring to the Soft -Start functioning are
contained in the group " ] rEG".
The Soft-Start function only works through PID control and allows
the limitation of control power when the instrument is switched on,
for a programmable period of time.
This is useful when the actuator, driven by the instrument, may be
damaged excess power supplied when the application is not yet in
the normal rating. (ex. for certain heating elements).
The function depends on the following parameters :
"St.P" - Soft-Start power
"SSt" - Soft-Start time (expressed in hh.mm)
"HSEt" - End Soft Start cycle threshold
If both parameters are programmed with values other than OFF,
when switched on the instrument gives an output power as
programmed on par. "St.P" for the time programmed on par. "SSt"
or when is reached the absolute value programmed at par. "HSEt".
Practically, the instrument works in manual condition and switches
to automatic control at the elapsing of time "SSt" or when is
reached the absolute value programmed at par. "HSEt".
To disable the Soft-Start function simply program par. "SSt" = OFF.
Whenever, a measurement errors occurs during the Soft-Start
execution, the function is interrupted and the instrument gives an
output power as programmed on par. "OPE".
If the measurement is restored, the Soft-Start is still deactivated.
If it's desired to activate the Autotuning with Soft-Start set par.
"Auto"=4.
The Autotuning will start automatically at the end of programmed
Soft-Start cycle at the condition that the process value is lower
(with "Func" =HEAt) than [SP- |SP/5|] or higher (with "Func" =CooL)
than [SP+ |SP/5|].
411- ALARMS OUTPUTS FUNCTIONS (AL1, AL2, AL3)
The alarms (AL1, AL2, AL3) are depending on the process value
and before to set his functioning it's necessary to establish to which
output the alarm has to correspond to.
First of all it's necessary to configure, in the parameters group
" ] Out", the parameters relative to the outputs required as alarm
("O1F" , "O2F" ,"O3F", "O4F") programming the parameter relative
to the desired output as follows :
= ALno if the alarm output has to be ON when the alarm is active,
while it's OFF when the alarm is not active
= ALnc if the alarm output has to be ON when the alarm is not
active, while it's OFF when the alarm is active
= ALni if the alarm output has to be ON when the alarm is not
active, while it is OFF when the alarm is active but with reverse led
indication (led ON= alarm OFF).
Note: In all the examples that follow is made reference to the alarm
AL1. Naturally the operation of the other alarms results analogous.
Have now access at the group "
"OAL1" , to which output the alarm signal has to be sent.
The alarm functioning is instead defined by parameters :
TECNOLOGIC spa - TLK 31 D - OPERATING INSTRUCTIONS - Vr. 02 - ISTR-MTLK31DENG2 - PAG. 8
d u r . t
S L o F
A U T O t i m e [ m i n . ]
c h a n g e
S e t
] AL1", and program on par.
"PrA1"- 1 ALARM PROCESS MEASUREMENT
"AL1t " - ALARM TYPE
"Ab1" - ALARM CONFIGURATION
"AL1" - ALARM THRESHOLD
"AL1L" - LOW ALARM THRESHOLD (for band alarm) OR
MINIMUM SET OF AL1 ALARM THRESHOLD (for low or high
alarm)
S P 2
"AL1H" - HIGH ALARM THRESHOLD (for band alarm) OR
MAXIMUM SET OF AL1 ALARM THRESHOLD (for low or high
alarm)
"HAL1" - ALARM HYSTERESIS
"AL1d" - ALARM ACTIVATION DELAY (in sec.)
"AL1i" - ALARM
MEASUREMENT ERROR
"PrA1" – ALARM PROCESS MEASUREMENT: Through this
parameter it is possible to set the process variable used by the
alarm for operating.
In fact the alarm can operate considering the process variable as
the value measured at input 1 (Pr1), the value measured at input 2
(Pr2), the difference between the two inputs Pr1-Pr2 (P1-2) or can
consider the difference between the two inputs Pr1-Pr2 but with a
maximum limit and a minimum limit for the Pr2 measurement Pr2
(P1-L).
"AL1t" – ALARM TYPE :
different ways.
LoAb = ABSOLUTE LOW ALARM: The alarm is activated when
the process value goes below the alarm threshold set on parameter
"AL1" and will be deactivated when it goes above the value
[AL1+HAL1].
With this mode is possible to program the minimum and the
maximum set of "AL1" by "AL1L" and "AL1H" parameters.
HiAb = ABSOLUTE HIGH ALARM: The alarm is activated when the
process value goes higher than the alarm threshold
parameter "AL1" and will be deactivated when it goes below the
value [AL1 - HAL1].
With this mode is possible to program the minimum and the
maximum set of "AL1" by "AL1L" and "AL1H" parameters.
PV
AL1
ON
OUT
AL1
off
LoAb
LodE = DEVIATION LOW ALARM: The alarm is activated when
the process value goes below the value [SP + AL1] and will be
deactivated when it goes above the value [SP + AL1 + HAL1].
With this mode is possible to program the minimum and the
maximum set of "AL1" by "AL1L" and "AL1H" parameters.
HidE = DEVIATION HIGH ALARM: The alarm is activated when the
process value goes above the value [SP + AL1] and will be
deactivated when it goes below the value [SP + AL1 - HAL1].
With this mode is possible to program the minimum and the
maximum set of "AL1" by "AL1L" and "AL1H" parameters.
PV
SP
-AL1
ON
OUT
AL1
off
LodE
LHAb = ABSOLUTE BAND ALARM: The alarm is activated when
the process value goes under the alarm threshold set on parameter
BEHAVIOUR IN
the alarm output can behave in six
PV
AL1
HAL1
ON
time
OUT
AL1
off off off
PV
AL1
HAL1
SP
ON
OUT
tim e
AL1
off off
off
THE EVENT OF
set on
HAL1
ON ON
time
off off
HiAb
HAL1
ON ON
time
off off
HidE