TECNOLOGIC spa - TLK 43
- OPERATING INSTRUCTIONS - Vr.02 - ISTR 06267 - PAG. 6
= 2.rEG : Secondary control output
= ALno : Alarm output normally open
= ALnc : Alarm output normally closed
= OFF : Output deactivated
The coupling [outputs number – alarms number] can be effectuated
in the group relative to the alarm (“
]
AL1”,”
]
AL2” or “
]
AL3”).
- ANALOGICAL OUTPUTS 0/4..20 mA or 0/2..10 V (only OUT1,2):
The parameter
“Aorn”
will present within the group, with which it is
possible to set the beginning of the scale used for the output.
This parameter will therefore be set at:
= 0 : if one intends to use the beginning of the scale as equal to 0 (0
mA if the output is 0/4...20 mA, or 0 V if the output is 0/2...10 V)
= no_0 : if one intends to use the beginning of the scale other than 0
(4 mA if the output is 0/4...20 mA, or 2 V if the output is 0/2...10 V)
The parameter
“AonF”
will be present by which it is possible to
configure the function of the analogical output as:
= 1.rEG : Primary control output
= 2.rEG : Secondary control output
= r.inP : measurement retransmission output
= r.Err : error retransmission output [SP-PV]
= r.SP : Active Set Point retransmission output
= r.SEr : output led by serial communication line of the instrument
= OFF : deactivated output
In the case that analogical output is configured as 1.rEG or 2.rEG
the output signal will be proportional to the control power calculated
by the instrument starting from 0% (output signal corresponding to
the set beginning of the scale) up to 100% (output signal
corresponds to the maximum that can be supplied by the type of
output available).
The analogical control outputs can only be used for PID single
action or dual action controls.
If the set control mode was the ON/OFF type, the analogical output
could only take on the control states 0 % or 100 %.
In the case that the analogical output function should be configured
for the retransmission of the signal, it is therefore necessary to
programme another two parameters which set the minimum and
maximum reference values.
Therefore, in these cases, set the parameter
"AonL"
with the value
that the instrument must provide the minimum value (0/4 mA or 0/2
V) in output and the value to which the instrument must provide the
maximum value (20 mA o 10 V) to the parameter
"AonH"
in output.
4.3 – ON/OFF CONTROL (1rEG)
All the parameters referring to the ON/OFF control are contained in
the group
“
]
rEG”.
This type of control can be obtained by programming par.
"Cont"
=
On.FS or = On.FA and works on the output programmed as
1.rEG,
depending on the measure, on the active Set Point
“SP”
, on the
functioning mode
"Func”
and on the hysteresis
"HSEt
".
The instrument carries out an ON/OFF control with symmetric
hysteresis if “Cont" = On.FS or with asymmetrical hysteresis if
“Cont” = On.Fa.
The control works in the following way : in the case of reverse
action, or heating (“FunC”=HEAt), it deactivates the output, when
the process value reaches [SP + HSEt] in case of symmetrical
hysteresis, or [SP] in case of asymmetrical hysteresis and is then
activated again when the process value goes below value [SP -
HSEt]. Vice versa, in case of direct action or cooling ("Func”=CooL),
it deactivates the output, when the process value reaches [SP -
HSEt] in case of symmetrical hysteresis, or [SP] in case of
asymmetrical hysteresis and is activated again when the process
value goes above value [SP + HSEt].
4.4 – NEUTRAL ZONE ON/OFF CONTROL (1rEG - 2rEG)
All the parameters referring to Neutral Zone ON/OFF control are
contained in the group
“
]
rEG”.
This type of control can be obtained when 2 outputs are
programmed respectively as 1rEG and 2rEG and the par.
“Cont”
=
nr .
The Neutral Zone control is used to control plants in which there is
an element which causes a positive increase (ex. Heater, humidifier,
etc.) and an element which causes a negative increase (ex. Cooler,
de-humidifier, etc).
The control functions works on the programmed outputs depending
on the measurement, on the active Set Point
“SP”
and on the
hysteresis
"HSEt
".
The control works in the following way : it deactivates the outputs
when the process value reaches the Set Point and it activates the
output 1rEG when the process value goes below value [SP - HSEt],
or it activates the output 2rEG when the process value goes above
[SP + HSEt].
Consequently, the element causing a positive increase has to be
connected to the output programmed as 1rEG while the element
causing a negative increase has to be connected to the output
programmed as 2rEG.
4.5 – SINGLE ACTION PID CONTROL (1rEG)
All the parameters referring to PID control are contained in the
group
“
]
rEG”.
The Single Action PID control can be obtained by programming
par.
"Cont"
= Pid and works on the output 1rEG depending on the
active Set Point
“SP”
, on the functioning mode
"Func”
and on the
instrument’s PID algorithm with two degree of freedom.
