Ascon tecnologic KM3-L Installation and operation manual

Ascon Tecnologic - KM3L - ENGINEERING MANUAL - PAG. 1
KM3L
LIMIT
CONTROLLER
Engineering Manual
19/06 - Code: ISTR_M_KM3L_E_00_--
Ascon Tecnologic S.r.l.
Viale Indipendenza 56, 27029 Vigevano (PV) - ITALY
Tel.: [phone]/FAX: [phone]
www.ascontecnologic.com
e-mail: inf[email protected]
1. OUTLINE DIMENSIONS (mm)
1.1 Mounting requirements
This instrument is intended for permanent installation, for
indoor use only, in an electrical panel which encloses the
rear housing, exposed terminals and wiring on the back.
Select a mounting location having the following characteristics:
1. It should be easily accessible;
2. There is minimum vibrations and no impact;
3. There are no corrosive gases;
4. There are no water or other fluids (i.e. condensation);
5. The ambient temperature is in accordance with the
operative temperature (0 to 50°C);
6. The relative humidity is in accordance with the instrument
specifications (20 to 90%);
The instrument can be mounted on panel with a maximum
thickness of 8 mm.
When the maximum front protection (IP65) is desired, the
optional gasket must be mounted.
1.2 Instrument dimensions
PV
SP
EX OUT PK
HI AL1AL2
KM3L
48 4811 14
Panel thickness
8 mm max.
Optional
gasket
48
1.3 Panel Cut-out
65 mm min.
2.56 in min.
45+0.6 mm
1.78+0.023 in
45+0.6 mm
1.78+0.023 in
65 mm min.
2.56 in min.
2. CONNECTION DIAGRAM
2.1 General notes about wiring
1. Do not run input wires together with power cables.
2. External components (like zener barriers, etc.) connected
between sensor and input terminals may cause errors in
measurement due to excessive and/or not balanced line
resistance or possible leakage currents.
3. When a shielded cable is used, it should be connected at
one point only.
4. Pay attention to the line resistance; a high line resistance
may cause measurement errors.
2.2 Electrical connections
RS485
TERMINALS
Pin connector
q
1.4 mm max .
(0.055 in.)
Stripped wire
L: 5.5 mm
(0.21 in.)
L
Thermo-
couple
DI1
OP3
Limiter
output
(OP2)
OP1
OP4
(note)
Analogue input
mV, V mA
Note: Terminal 4 can be programmed as:
- 0... 12 V SSR Drive Output (OP4) connecting
the load between terminals 4 and 16;
- 12 Vdc (20 mA) transmitter power supply
connecting the 2 wire transmitter between
terminals 4 and 1; for 3 wire transmitter connect
terminal 4 to transmitter power supply input and
terminal 1 and 2 to transmitter signal output.
12 VDC
(note)
PV
4... 20 mA
3 wire transmitter
12 VDC
(note)
PV
Pt100Pt1000
4... 20 mA
2 wire transmitter
Neutral
Line
Power
supply
Out1: 4... 20 mA or
0/2... 10 V
Out4: 0... 12 VDC
100...240 VDC

Ascon Tecnologic - KM3L - ENGINEERING MANUAL - PAG. 2
2.3 Inputs
2.3.1 Termocouple Input
1
2
+
_
External resistance: 100Ωmax., maximum error 25 mV.
Continuity detection current: 250 nA.
Cold junction: Automatic compensation between 0 to 50°C.
Cold junction accuracy: 0.05°C/°C after a warm-up of
20 minutes.
Input impedance: > 1 MΩ.
Burn out: full scale
Calibration: According to EN 60584-1.
Note: For TC wiring use proper compensating cable
preferable shielded.
2.3.2 RTD Pt 100 Input
3
RTD
1
2
Input circuit: Current injection (135 µA).
Line resistance: Automatic compensation up to 20Ω/wire
with maximum error ±0.03% of the input span.
Calibration: According to EN 60751/A2.
Note: The resistance of the 3 wires must be the same.
2.3.3 RTD Pt 1000 Input
2
3
Pt1000
Line resistance: Not compensated.
Pt 1000 input circuit: Current injection (15 µA).
Pt 1000 calibration: According to EN 60751/A2.
2.3.4 V and mV Input
mV
V+
_
+
_
1
2
Input impedance: > 1 MΩfor mV Input
500 kΩfor Volt Input.
2.3.5 mA Input
0/4 to 20 mA input wiring for passive transmitter
using the auxiliary pws
+
_
4 to 20 mA
Passive
transmitter
4
1
Input impedance: < 53Ω.
Internal auxiliary PWS: 12 VDC (±10%), 20 mA max..
0/4 to 20 mA input wiring for passive transmitter
using an external pws
+
_
+
_
1
2
0/4 to 20 mA
Passive
transmitter
_
External
PWS
+
0/4 to 20 mA input wiring for active transmitter
0/4 to 20 mA
Active
transmitter +
_
+
_
1
2
2.3.6 Logic Inputs
Safety notes:
–Do not run logic input wiring together with power cables;
–The instrument needs 150 ms to recognize a contact
status variation;
–Logic inputs are NOT isolated by the measuring input.
A double or reinforced isolation between logic inputs and
power line must be assured by the external elements.
Logic inputs driven by dry contact
15
16
Digital
input 1
Maximum contact resistance: 100Ω.
Contact rating: DI1 = 10 V, 6 mA.
2.4 Outputs
Safety notes:
–To avoid electrical shocks, connect power line at last.
–For supply connections use No. 16 AWG or larger wires
rated for at last 75°C.
–Use copper conductors only.
–SSR outputs are not isolated. A reinforced isolation must
be assured by the external solid state relays.
–For SSR, mA and V outputs if the line length is longer than
30 m use a shielded wire.
–Do not short-circuit the terminals of the SSR output.
D Before connecting the output actuators,
we recommend to configure the parameters to suit
your application (e.g.: input type, Control strategy,
alarms, etc.).

Ascon Tecnologic - KM3L - ENGINEERING MANUAL - PAG. 3
2.4.1 Output 1 (OP1)
Function: retransmission
Output type: Isolated output.
Current Analog Output
mA
+
-
7
8
mA output: 0/4... 20 mA, galvanically isolated, RL max. 600Ω.
Voltage Analog Output
V
+
-
7
8
V output: 0/2... 10 V, galvanically isolated, RL min.: 500Ω.
2.4.2 Output 2 (OP2)
Function: Limiter output
Relay Output
C
NO
13
14
Contact rating: • 2 A /250 V cosj= 1;
• 1 A /250 V cosj= 0.4.
Operation: 1 x 105.
2.4.3 Output 3 (OP3)
Relay Output
C
NO
11
12
Contact rating: • 2 A /250 V cosj= 1;
• 1 A /250 V cosj= 0.4.
Operation: 1 x 105.
2.4.4 Output 4 (OP4)
SSR Output
SSR
+
-
4
Out4 4
16
Logic level 0: Vout < 0.5 VDC;
Logic level 1: 12 V ±20%, 20 mA max..
Note: Overload protected.
2.5 Serial Interface
D +
D -
D +
D -
D +
D -
D +
D -
RS-485
5
6
Interface type: Isolated (50 V) RS-485;
Voltage levels: According to EIA standard;
Protocol type: Modbus RTU;
Byte format: 8 bit with no parity;
Stop bit: 1 (one);
Baud rate: Programmable between 1200 to 38400 baud;
Address: Programmable between 1 to 254.
Notes: 1. RS-485 interface allows to connect up to 30
devices with one remote master unit.
2. The cable length must not exceed 1.5 km at
9600 baud.
2.6 Power Supply
Power Supply
9
10
Neutral
Line
Supply Voltage: 100 to 240 VAC (-15 to +10%).
Notes: 1. Before connecting the instrument to the power
line, make sure that line voltage is equal to the
voltage shown on the identification label;
2. The polarity of the power supply has no importance;
3. The power supply input is NOT fuse protected.
Please, provide a T type 1A, 250 V fuse externally.

Ascon Tecnologic - KM3L - ENGINEERING MANUAL - PAG. 4
3. TECHNICAL CHARACTERISTICS
3.1 Technical specification
Case: Plastic, self-extinguishing degree: V-0 according to UL 94;
Front protection: IP 65 (when the optional panel gasket is
mounted) for indoor locations according to EN 60070-1;
Terminals protection: IP 20 according to EN 60070-1;
Installation: Panel mounting;
Terminal block: 16 screw terminals for cables of
0.25 to 2.5 mm2(AWG22 to AWG14) with connection
diagram, tightening torque 0.5 Nm;
Dimensions: 48 x 48, depth 73 mm, (1.89 x 1.89 x 2.87 in.)
Panel cutout: 45[-0, +0.6] x 45[-0, +0.6] mm
(1.78[- 0.000, +0.023] x 1.78[- 0.000, +0.023] in.)
Weight: 180 g max..
Power supply:100 to 240 VAC (-15 to +10% of the
nominal value);
Power consumption: 6.0 VA max. (100 to 240 VAC);
Insulation voltage: 2300 Vrms according to EN 61010-1;
Display updating time: 500 ms;
Sampling time: 130 ms;
Resolution: 30000 counts;
Total Accuracy: ±0.5% F.S.V. ±1 digit @ 25°C of room
temperature;
Electromagnetic compatibility and safety requirements
Compliance: directive EMC 2004/108/CE (EN 61326-1),
directive LV 2006/95/CE (EN 61010-1),
UL 61010-1 CSA 61010-1;
Note: During the test, the instrument continues to operate at
the measurement accuracy within specification.
Installation category: II;
Pollution category: 2;
Temperature drift: It is part of the global accuracy;
Operating temperature: 0 to 50°C (32 to 122°F);
Storage temperature: -30 to +70°C (-22 to +158°F);
Humidity: 20 to 90% RH, not condensing.
4. MODEL AND SUFFIX CODES
Power supply
H= 100... 240 VAC
Analoue input + Digital Input DI1 (standard)
C= J, K, R, S, T, PT100, PT 1000 (2 wires), mA, mV, V
Output 1
-= Not available
I= Insulated 0/4... 20 mA, 0/2... 10 V
Output 3
-= Not available
R= Relay SPST NA 2 A (resistive load)
Output 4
D= Transmitter
Power Supply
Serial Communications
-= TTL Modbus
S= RS485 Modbus + TTL Modbus
Connection type
-= Standard (screw terminals not removable)
E= Removable screw terminals
M= Removable spring terminals
N = Removable terminals (the fixed part only)
Output 2
R= Relay SPST NA 2 A (resistive load)
Model
KM3L = Controller with Limiter Capabilities

Ascon Tecnologic - KM3L - ENGINEERING MANUAL - PAG. 5
5. CONFIGURATION PROCEDURE
5.1 Introduction
When the instrument is powered, it starts immediately to work
according to the parameters values loaded in its memory.
The instrument behaviour and its performance are governed
by the value of the stored parameters.
At the first start up the instrument will use a “default”
parameter set (factory parameter set); this set is a generic
one (e.g. a TC J input is programmed).
D Before connecting the output actuators, we recom-
mend to configure the parameters to suit your applica-
tion (e.g.: input type, Control strategy, alarms, etc.).
To change these parameters you need to enter the
“Configuration mode”.
5.2 Instrument behaviour at Power ON
At power ON the instrument can operate in 2 different modes
according to the value assigned to [34] r.md parameter:
[34] r.md equal to 0 (Limit relay output is always
de-energized at power ON)
The output relay is always de-energized (open) at power ON,
even if PV does not exceed SP (A). The output (
OUT
) LED is lit.
If PV does not exceed SP, after the Confirmation operation (B),
the limit output relay (Out 2) will be energized (closed) and
the output (
OUT
) LED turns OFF.
(A) (B) (B)
Power ON
Operation
Output
relay
Output
lamp
EXCEED
lamp
Confirmation Confirmation
SP
HYS
PV
OFF
OFF OFF
OFF
OFF
OFF
OFF
LitLit
LitLit
ON ON
Lit
(C) (D)
[34] r.md equal to 1 (Limit relay output energized at power ON)
At power ON the limit relay output is energized (closed) and
the output (
OUT
) LED is not lit if the PV does not exceed SP.
(A) (C) (D)
Output
relay
Output
lamp
EXCEED
lamp
ConfirmationPower ON
Operation
SP
HYS
PV
OFF
OFF
OFF
OFF
OFF OFF
LitLit
Lit
ON ON
(B)
5.3 Entering the “Configuration mode”
The configuration parameters are collected in various
groups. Each group defines all parameters related with a
specific function (e.g.: control, alarms, output functions).
1. Push the button for more than 3 seconds. The upper
display will show PASS while the lower display shows 0.
2. Using and buttons set the programmed password.
Note: The factory default password for configuration
parameters is 30.
3. Push the button. If the correct password has been
inserted, the upper display will show the acronym of the first
parameter group preceded by the symbol: ] .
In other words the upper display shows: ]inp
(Input parameters group).
The instrument is in configuration mode.
5.4 How to exit the “Configuration mode”
Push button for more than 3 seconds, the instrument
returns to the “Standard display”.
5.5 Keyboard functions during parameter
changing
A short press allows to exit from the current parameter
group and select a new parameter group.
A long press allows you to close the configuration
parameter procedure (the instrument returns to the
“Standard display”).
When the upper display is showing a group and the
lower display is blank, this key allows to enter in the
selected group.
When the upper display is showing a parameter and
the lower display is showing its value, this key allows
to store the selected value for the current parameter
and access the next parameter within the same group.
Allows to increase the value of the selected parameter.
Allows to decrease the value of the selected parameter.
+ These two keys allow to return to the previous
group. Proceed as follows:
Push the button and maintaining the pressure,
then push the button; release both the buttons.
Note: The group selection is cyclic as well as the selection
of the parameters in a group.
5.6 Factory reset -
Default parameters loading procedure
Sometime, e.g. when you re-configure an instrument
previously used by other people or for different purposes or
when you have made too many errors during configuration
and you decided to re-configure the instrument, it is possible
to restore the factory configuration.
This action allows to put the instrument in a defined
condition (the same it was at the first power ON).
The default data are those typical values loaded in the
instrument prior to ship it from factory.
To load the factory default parameter set, proceed as follows:
1. Press the
button for more than 5 seconds. The upper
display will show PASS while the lower display shows 0;
2. Using
and buttons set the value -481;
3. Push
button;
4. The instrument will turn OFF all LEDs for a few seconds,
then the upper display will show dFLt (default) after that
all LEDs are turned ON for 2 seconds. At this point the
instrument restarts as for a new power ON.
The procedure is complete.
Note: The complete list of the default parameters is available
in Appendix A.

Ascon Tecnologic - KM3L - ENGINEERING MANUAL - PAG. 6
5.7 Configuring all parameters
In the following pages we will describe all the parameters
of the instrument. However, the instrument only shows the
parameters applicable to its hardware options in accordance
with the specific instrument configuration (i.e. setting AL1t
[Alarm 1 type] to nonE [not used], all parameters related to
alarm 1 will be skipped).
]inP Group - Main and auxiliary input configuration
[1] SEnS - Input type
Available: Always.
Range: J TC J (-50... +1000°C/-58... +1832°F);
crAL TC K (-50... +1370°C/-58... +2498°F);
S TC S (-50... 1760°C/-58... +3200°F);
r TC R (-50... +1760°C/-58... +3200°F);
t TC T (-70... +400°C/-94... +752°F);
n TC N (-50 ...+1300°C/-58...+2372°F)
Pt1 RTD Pt100 (-200... +850°C/-328... +1562°F);
Pt10 RTD Pt1000 (-200... +850°C/-328... +1562°F);
0.60 0... 60 mV linear;
12.60 12... 60 mV linear;
0.20 0... 20 mA linear;
4.20 4... 20 mA linear;
0.5 0... 5 V linear;
1.5 1... 5 V linear;
0.10 0... 10 V linear;
2.10 2... 10 V linear.
Notes: 1. When a TC input is selected and a decimal figure
is programmed (see the next parameter) the max.
displayed value becomes 999.9°C or 999.9°F.
2. All changes to SEnS parameter setting force param-
eter [2] dP = 0 and change all parameters related
with dP (e.g. Set Points, Alarms threshold, etc.).
[2] dP - Decimal point position
Available: Always.
Range: 0 to 3 When [1] SenS = Linear input;
0 or 1 When [1] SenS different from a linear input.
Note: All changes to dP parameter setting produce a
change of all parameters related with it
(e.g.: Set Points, Alarm threshold, etc.).
[3] SSc - Initial scale read-out for linear inputs
Available: When a linear input is selected by [1] SenS.
Range: -1999 to 9999.
Notes: 1. SSc allows the scaling of the analog input to set
the minimum displayed/measured value. The
instrument is able to display the measured value
until it reaches a value of 5% lower than SSc,
below which shows the Underrange message.
2. It is possible to set a initial scale read-out higher
then the full scale read-out in order to obtain a
reverse read-out scaling.
E.g.:
0 mA = 0 mBar and 20 mA = -1000 mBar (vacuum).
[4] FSc - Full scale read-out for linear input
Available: When a linear input is selected by [1] SenS.
Range: -1999 to 9999.
Notes: 1. Fsc allows the scaling of the analog input to set
the maximum displayed/measured value. The
instrument is able to display the measured value
until it reaches a value of 5% higher than FSc,
above which shows the Overrange message.
2. It is possible to set a full scale read-out lower
than the initial scale read-out in order to obtain a
reverse read-out scaling.
E.g.:
0 mA = 0 mBar and 20 mA = -1000 mBar (vacuum).
[5] unit - Engineering unit
Available: When a temperature sensor is selected by
[1] SenS parameter.
Range: °C Celsius;
°F Fahrenheit.
[6] FiL - Digital filter ON the measured value
Available: Always.
Range: oFF (No filter);
0.1 to 20.0 s.
Note: This is a first order digital filter applied ON the
measured value. For this reason it will affect the
measured value but also the control action and the
alarms behaviour.
[7] bS - PV input bias
Available: Always.
Range: In Engineering Units. Programmable from
-100% to +100% of the input span.
[8] di.A - Digital Inputs Action
Available: Always.
Range: 0 DI1 Direct action (transition open -> close);
1 DI1 Reverse action (transition closed -> open).
]out Group - Output parameters
[9] o1.t - Out 1 type
Available: When the out 1 is present.
Range: 0-20 0 to 20 mA;
4-20 4 to 20 mA;
0-10 0 to 10 V;
2-10 2 to 10 V.
[10] o1.F - Out 1 function
Available: Always.
Range: nonE Output not used;
r.inP Measured value Analog retransmission;
r.Err Measured error (PV-SP) analog retransmission;
r.SP Operative Set Point analog retransmission;
r.SEr Analog retransmission of a value coming from
serial link.
[11] A.o1L - Initial scale value of the analog
retransmission
Available: When Out 1 is present
Range: -1999 to [12] Ao1H.
[12] A.o1H - Full scale value of the analog
retransmission
Available: When Out 1 is present.
Range: [11] Ao1L to 9999.
[13] o3F - Out 3 function
Available: When the instrument has out 3 option.
Range: nonE Output not used. With this setting the status of
this output can be driven directly from serial link;
AL Alarm output;
or.bo Out-of-range or burn out indicator;
P.FAL Power failure indicator;
bo.PF Out-of-range, burn out and Power failure
indicator.

Ascon Tecnologic - KM3L - ENGINEERING MANUAL - PAG. 7
[14] o3.AL - Alarms linked up with Out 3
Available: When [13] o3F = AL.
Range: 0 to 15 with the following rule:
+1 Alarm 1;
+2 Alarm 2;
+4 Sensor break (burn out);
+8 Overload ON Out 4 (short circuit ON OP 4).
Example: Setting 3 (2 + 1) the output is driven by alarms 1
and 2 (OR condition).
[15] o3Ac - Out 3 action
Available: When [13] o3F is different from “nonE”.
Range: dir Direct action;
rEU Reverse action;
Notes: 1. Direct action: the output repeats the status of the
driven element. Example: the output is an alarm
output with direct action. When the alarm is ON,
the relay will be energized (logic output 1).
2. Reverse action: the output status is the opposite
of the status of the driven element. Example:
the output is an alarm output with reverse
action. When the alarm is OFF, the relay will be
energized (logic output 1).
This setting is usually named “fail-safe” and it is
generally used in dangerous process in order to
generate an alarm when the instrument power
supply goes OFF or the internal watchdog starts.
[16] o4F - Out 4 function
Available: Always.
Range: nonE Output not used. With this setting the status
of the this output can be driven directly from
serial link.
AL Alarm output;
or.bo Out-of-range or burn out indicator;
P.FAL Power failure indicator;
bo.PF Out-of-range, burn out and Power failure
indicator;
ON Output always ON (Out 4 is used to supply
the transmitter).
[17] o4.AL - Alarms linked up with Out 4
Available: When [16] o4F = AL.
Range: 0 to 15 with the following rule.
+1 Alarm 1;
+2 Alarm 2;
+4 Sensor break (burn out);
+8 Overload ON Out 4 (short circuit ON OP4).
For more details see [14] o3.AL parameter.
[18] o4Ac - Out 4 action
Available: When [16] o4F is different from “nonE”.
Range: dir Direct action;
rEU Reverse action;.
For more details see [15] o4.Ac parameter.
]AL1 Group - Alarm 1 parameters
[19] AL1t - Alarm 1 type
Available: Always.
Range: When one or more outputs are programmed as
control output:
nonE Alarm not used;
LoAb Absolute low alarm;
HiAb Absolute high alarm;
LHAo Absolute band alarm with alarm indication
out of the band;
LHAi Absolute band alarm with alarm indication
inside the band;
SE.br Sensor break;
LodE Deviation low alarm (relative);
HidE Deviation high alarm (relative);
LHdo Relative band alarm with alarm indication out
of the band;
LHdi Relative band alarm with alarm indication
inside the band.
Notes: 1. The relative and deviation alarms are “relative” to
the operative Set Point value.
LoAb
OUT
AL1
AL1
PV
HAL1
time
HiAb
offoffoff OUT
AL1
AL1
PV
HAL1
time
offoffoff
ON ON ON ON
LHAo
PV
AL1H HAL1
time
offoffoff
LHdo
OUT
AL1
AL1L HAL1
PV
AL1H
SP
HAL1
time
OUT
AL1
-AL1L HAL1
offoffoff
ON ON ON ON
2. The (SE.br) sensor break alarm will be ON when
the display shows ---- indication.
[20] Ab1 - Alarm 1 function
Available: When [28] AL1t is different from “nonE”.
Range: 0 to 3 with the following rule:
+1 Not active at power up;
+2 Relative alarm not active at Set Point change.
Notes: 1. The “not active at power up” selection allows to
inhibit the alarm function at instrument power up
The alarm will be automatically enabled when
the measured value reaches, for the first time,
the alarm threshold ±hysteresis (in other words,
when the initial alarm condition disappears).
PWR ON
AL1
PV
time
offoff
Ab1 = +1
Ab1 = +0
offoff
ON ON
ON
2. A “relative alarm not active at Set Point change”
is an alarm that masks the alarm condition after
a Set Point change until process variable reaches
the alarm threshold ±hysteresis.

Ascon Tecnologic - KM3L - ENGINEERING MANUAL - PAG. 8
Sp2
Sp1
PV
time
Ab1 = +8
Ab1 = +0
ON offoff
AL1
offoffoff
AL1
ON ON ON
ON
3. The instrument does not store in EEPROM the
alarm status. For this reason, the alarm status
will be lost if a power down occurs.
[21] AL1L- For high and low alarms AL1L is the
low limit of the AL1 threshold
- For band alarm is low alarm threshold
Available: When [19] AL1t is different from “nonE” or [19]
AL1t is different from “SE.br”.
Range: From -1999 to [22] AL1H Engineering Units.
[22] AL1H - For high and low alarms AL1H is the
high limit of the AL1 threshold
-
For band alarm is the high alarm threshold
Available: When [19] AL1t is different from “nonE” or [19]
AL1t is different from “SE.br”.
Range: From [21] AL1L to 9999 Engineering Units.
[23] AL1- Alarm 1 threshold
Available: When:
[19] AL1t = LoAb - Absolute low alarm;
[19] AL1t = HiAb - Absolute high alarm;
[19] AL1t = LodE - Deviation low alarm (relative);
[19] AL1t = HIdE - Deviation high alarm (relative).
Range: From [21] AL1L to [22] AL1H Engineering Units.
[24] HAL1 - Alarm 1 hysteresis
Available: When [19] AL1t is different from “nonE” or
[19] AL1t is different from “SE.br”.
Range: 1 to 9999 Engineering Units.
Notes: 1. The hysteresis value is the difference between
the Alarm threshold value and the point the
Alarm automatically resets.
2. When the alarm threshold plus or minus the
hysteresis is out of input range, the instrument
will not be able to reset the alarm.
Example: Input range 0 to 1000 (mBar).
–Set point equal to 900 (mBar);
–Deviation low alarm equal to 50 (mBar);
–Hysteresis equal to 160 (mBar) the theoretical reSet Point is
900 - 50 + 160 = 1010 (mBar) but this value is out of range.
The reset can be made only by turning the instrument
OFF, removing the condition that generate the alarm and
then turn the instrument ON again;
–All band alarms use the same hysteresis value for both
thresholds;
–When the hysteresis of a band alarm is bigger than the
programmed band, the instrument will not be able to reset
the alarm.
[25] AL1d - Alarm 1 delay
Available: When [19] AL1t is different from “nonE”.
Range: From oFF (0) to 9999 seconds.
Note: The alarm goes ON only when the alarm condition
persists for a time longer than [25] AL1d time but the
reset is immediate.
]AL2 Group - Alarm 2 parameters
[26] AL2t - Alarm 2 type
Available: Aways.
Range: When one or more outputs are programmed as
control output:
nonE Alarm not used;
LoAb Absolute low alarm;
HiAb Absolute high alarm;
LHAo Absolute band alarm with alarm indication
out of the band;
LHAi Absolute band alarm with alarm indication
inside the band;
SE.br Sensor break;
LodE Deviation low alarm (relative);
HidE Deviation high alarm (relative);
LHdo Relative band alarm with alarm indication out
of the band;
LHdi Relative band alarm with alarm indication
inside the band;
Note: The relative alarm are “relative” to the operative Set
Point value
[27] Ab2 - Alarm 2 function
Available: When [36] AL2t is different from “nonE”.
Range: 0 to 3 with the following rule:
+1 Not active at power up;
+2 Relative alarm not active at Set Point change.
Note: For other details see [20] Ab1 parameter.
[28] AL2L - For high and low alarms AL2L is the
low limit of the AL2 threshold
- For band alarm is low alarm threshold
Available: When [26] AL2t is different from “nonE” or [26]
AL2t is different from “SE.br”.
Range: -1999 to [29] AL2H Engineering Units.
[29] AL2H - For high and low alarms AL2H is the
high limit of the AL2 threshold
- For band alarm is the high alarm threshold
Available: When [26] AL2t is different from “nonE” or
[26] AL2t is different from “SE.br”.
Range: From [28] AL2L to 9999 Engineering Units.
[30] AL2 - Alarm 2 threshold
Available: When:
[26] AL2t = LoAb Absolute low alarm;
[26] AL2t = HiAb Absolute high alarm;
[26] AL2t = LodE Deviation low alarm (relative);
[26] AL2t = HIdE Deviation high alarm (relative).
Range: From [28] AL2L to [29] AL2H Engineering Units.
[31] HAL2 - Alarm 2 hysteresis
Available: When [26] AL2t is different to “nonE” or
[26] AL2t is differ2nt from “SE.br”.
Range: 1 to 9999 Engineering Units.
Note: For other details see [24] HAL1 parameter.
[32] AL2d - Alarm 2 delay
Available: When [26] AL2t different form “nonE”.
Range: From oFF (0) to 9999 seconds.
Note: The alarm goes ON only when the alarm condition
persist for a time longer than [32] AL2d time but the
reset is immediate.

Ascon Tecnologic - KM3L - ENGINEERING MANUAL - PAG. 9
]rEG group - Control parameters
[33] Hi.Lo - Limit Control type
Available: Aways.
Range: Hi High limiter;
Lo Low limiter.
High limit control ( LED lit)
(A) (B) (C)
Energized
De-energiz
ed
Output
relay
Output
lamp
EXCEED
lamp
Confirmation
(not accepted)
Confirmation
(accepted)
SP
HYS
PV
OFFOFFOFF
OFFOFF
(A) (D) (B)
LitLit Lit
Lit Lit
ON ON OFFOFF
Confirmation
( key or
Digital Input)
When the measured value (PV) exceeds the Set Point (SP),
the EXCEED [
EX
] and output [
OUT
] LEDs turn ON and the
limit relay output (Out 2) is de-energized.
EX
LED turns OFF when PV returns in normal condition, while
the output
OUT
LED remains ON (B). The output
OUT
LED turns
OFF when a Confirmation operation (rearm) is done by the
operator. The Confirmation operation (rearm) can be done
according to the diS parameter setting:
• By pressing key;
• By closing the Digital Input.
When the
EX
LED is ON and PV is lower than SP, but inside
the Hysteresis area, the upper display is shown in green.
The Confirmation operation is not accepted while the
EX
LED is lighted (D)(while PV exceeds SP or when PV is
in the Hysteresis area after EX has been triggered). The
relay output is de-energized whenever the
OUT
LED is ON.
Low limit control
(A) (B) (C)
Output
relay
Output
lamp
EXCEED
lamp
Confirmation
(not accepted)
Confirmation
(accepted)
Confirmation
( key or
Digital Input)
SP
HYS
PV
(A) (B)(D)
OFF
OFF OFF
OFF OFF
Lit
Lit
Lit
OFF OFF
Lit
ON ON Energized
De-energiz
ed
When the measured value (PV) exceeds the Set Point (SP),
the EXCEED [
EX
] and output [
OUT
] LEDs turn ON and the
limit relay output (Out 2) is de-energized.
EX
LED turns OFF when PV returns in normal condition, while
the output
OUT
LED remains ON (B). The output
OUT
LED turns
OFF when a Confirmation operation (rearm) is done by the
operator. The Confirmation operation (rearm) can be done
according to the diS parameter setting:
• By pressing key;
• By closing the Digital Input.
When the
EX
LED is ON and PV is lower than SP, but inside
the Hysteresis area, the upper display is shown in green.
The Confirmation operation is not accepted while the
EX
LED is lighted (D)(if PV exceeds SP or when PV is in
the Hysteresis area after
EX
has been triggered). The
relay output is de-energized whenever the
OUT
LED is ON.
[34] r.md - Limit output status at power ON
Available: Always.
Range: on Limit output is ON in any case;
oFF Limit output is OFF at power ON when PV
does not exceed SP.
[35] HYS - Limit output Hysteresis
Available: Always.
Range: In Engineering Units from 0 to 100% of the input span.
[36] oP.SL - Operating display selection
Available: Always.
Range: 0 PV (upper display) and SP (lower display);
1 SP only.
Note: Setting [36] oP.SL equal to 1, the instrument will not
show the measured value and, in operator mode, the
upper display will be blank.
[37] SPLL - Minimum Set Point value
Available: Always.
Range: From -1999 to [38] SPHL in Engineering Units.
Note: Changing the [37] SPLL value, the instrument checks
the local Set Points (SP parameters).
If SP is out of this range, the instrument forces it to the
maximum acceptable value.
[38] SPHL - Maximum Set Point value
Available: Always.
Range: From [37] SPLL to 9999 Engineering Units.
Note: For more details see [37] SPLL parameter.
[39] SP - Set Point 1
Available: Always.
Range: From [37] SPLL to [38] SPHL in Engineering Units.
[40] diS - Method of confirmation operation (rearm)
Available: Always.
Range: but By keyboard through key;
di By digital input.
[41] tim - Duration of the last EXCEED period
Available: Always but it is a Read Only parameter.
Range: From 00.00 to 99.59 (hh.mm).
[42] Hi- Maximum measured value ( LED lit)
Available: When [33] Hi.Lo = Hi (high limit alarm) but it is a
Read Only parameter.
Range: Engineering unit within the input range.
[43] Lo - Minimum measured value ( LED lit)
Available: When [33] Hi.Lo = Lo (low limit alarm) but it is a
Read Only parameter.
Range: Engineering unit within the input range.

Ascon Tecnologic - KM3L - ENGINEERING MANUAL - PAG. 10
]PAn group - Operator HMI
[44] PAS2 - Level 2 password: Limited access level
Available: Always.
Range: oFF Level 2 not protected by password
(as level 1 = Operator level);
1 to 200.
[45] PAS3 - Level 3 password:
Complete configuration level
Available: Always.
Range: 3 to 200.
Note: Setting [144] PAS2 equal to [45] PAS3, Level 2 will be
masked.
[46] di.CL - Display colour
Available: Always.
Range: 0 The upper display colour is used to point out the
EXCEED condition:
• When no exceed condition is present the up-
per digits are shown in green;
• When a Hi or Low exceed condition is detect-
ed the upper digits are shown in red.
1 Display red (fix);
2 Display green (fix);
3 Display orange (fix).
[47] diS.t - Display timeout
Available: Always.
Range: oFF The display is always ON;
0.1 to 99.59 minutes and seconds.
Note: This function allows to turn OFF the display when
no alarm is present and no action is made ON the
instrument.
When diS.t is different than OFF and no button is
pressed for more than the programmed time out, the
display goes OFF and only 4 segments of the less
significant digit are turned ON in sequence in order to
show that the instrument is working correctly.
If an alarm occurs or a button is pressed, the display
returns to normal operation.
]Ser group - Serial link parameter
[48] Add - Instrument address
Available: Always.
Range: oFF Serial interface not used;
1 to 254.
[49] bAud - Baud rate
Available: When [131] Add different from oFF.
Range: 1200 1200 baud;
2400 2400 baud;
9600 9600 baud;
19.2 19200 baud;
38.4 38400 baud.
]CAL group - User calibration group
This function allows to calibrate the complete measuring
chain and to compensate the errors due to:
–Sensor location;
–Sensor class (sensor errors);
–Instrument accuracy.
[50] A.L.P - Adjust Low Point
Available: Always.
Range: -1999 to (AH.P - 10) Engineering Units.
Note: The minimum difference between AL.P and AH.P is
equal to 10 Engineering Units.
[51] A.L.o - Adjust Low Offset
Available: Always.
Range: -300 to +300 in Engineering Units.
[52] A.H.P - Adjust High Point
Available: Always.
Range: From (AL.P + 10) to 9999 Engineering Units.
Note: The minimum difference between AL.P and AH.P is
equal to 10 Engineering Units.
[53] A.H.o - Adjust High Offset
Available: Always.
Range: -300 to +300 in Engineering Units.
Example: Environmental chamber with operative range:
10 to 100°C.
1. Insert in the chamber a reference sensor connected with
a reference instrument (usually a calibrator).
2. Start the instrument control and set the Set Point equal
to the minimum value of the operative range (e.g.: 10°C).
When the temperature in the chamber is steady, take
note of the temperature measured by the reference
system (e.g.: 9°C).
3. Set [139] A.L.P = 10 (low working point) and [51] A.L.o = -1
(the difference between the instrument and the reference
system readings). Note that after this set the measured
value of the instrument is equal to the measured value of
the reference system.
4. Now change the Set Point to the maximum value of the
operative range (e.g. 100°C). When the temperature
in the chamber is steady, take note of the temperature
measured by the reference system (e.g. 98°C).
5. Set [141] A.H.P = 100 (high working point) and
[53] A.H.o = +2 (the difference between the instrument
and the reference system readings). Note that after this
set the measured value of the instrument is equal to the
measured value of the reference system.
AH.P 100°C
AH.o = 2
AL.o = -1
AH.P 10°C
Real curve
Modified curve
The most important step of the configuration procedure is
completed.
In order to exit from configuration parameter procedure,
proceed as follows:
• Push button.
• Push button for more than 3 s. The instru-
ment returns to the “Standard display”.