Simex SRT-L70 User manual

Assisting the automation
industry since 1986
User manual
METER
SRT-L7
•Firmware: v.5.14 or higher
•Input type: Pt100/500/1000
•TS35 DIN rai mounted
Read the user's manual carefully before starting to use the unit or software.
Producer reserves the right to implement changes without prior notice.
2013.0 .0 SRT-L70_INSSXEN_v.2.07.001
Microlectra bv.
Microlectra bv.
Augustapolder 12. 2992 SR Barendrecht. The Netherlands.
www.microlectra.nl [email protected]

User manual - METER SRT-L70
CONTENTS
1. BASIC REQUIREMENTS AND USER SAFETY........................................................................................3
2. GENERAL CHARACTERISTICS................................................................................................................4
3. TECHNICAL DATA......................................................................................................................................4
4. DEVICE INSTALLATION............................................................................................................................6
4.1. UNPACKING.......................................................................................................................................6
4.2. ASSEMBLY........................................................................................................................................6
4.3. CONNECTION METHOD...................................................................................................................6
4.4. MAINTENANCE................................................................................................................................10
5. FRONT PANEL DESCRIPTION................................................................................................................11
6. PRINCIPLE OF OPERATION...................................................................................................................11
6.1. MEASUREMENT MODE..................................................................................................................11
6.2. DETECTION OF THE PEAK VALUES............................................................................................12
6.3. CONTROL OF THE RELAY OUTPUTS..........................................................................................13
6.3.1. One hreshold mode................................................................................................................15
6.3.2. Two hresholds mode..............................................................................................................16
7. DEVICE PROGRAMMING.........................................................................................................................17
7.1. PROGRAMMING MENU..................................................................................................................17
7.2. PARAMETERS EDITION.................................................................................................................18
7.2.1. Numeric parame ers (digi change mode)...............................................................................18
7.2.2. Numeric parame ers (slide change mode)..............................................................................18
7.2.3. Swi ch parame ers (“LIST” ype).............................................................................................19
7.3. MENU DESCRIPTION.....................................................................................................................19
7.3.1. “rEL1” menu.............................................................................................................................20
7.3.2. “inP ” menu..............................................................................................................................22
7.3.3. ”bri” parame er.........................................................................................................................22
7.3.4. ”HOLd” menu...........................................................................................................................22
7.3.5. ”SECu” menu...........................................................................................................................23
7.3.6. ”rS” menu.................................................................................................................................23
7.3.7. ”Edi ” parame er......................................................................................................................24
7.3.8. ”dEFS” parame er....................................................................................................................24
7.3.9. ”SErv” menu............................................................................................................................24
7.4. MENU STRUCTURE........................................................................................................................25
8. THE ALARM LED......................................................................................................................................26
. THE MODBUS PROTOCOL HANDLING.................................................................................................26
9.1. LIST OF REGISTERS......................................................................................................................26
9.2. TRANSMISSION ERRORS DESCRIPTION....................................................................................29
9.3. EXAMPLES OF QUERY/ANSWER FRAMES.................................................................................29
10. DEFAULT AND USER'S SETTINGS LIST.............................................................................................32
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User manual - METER SRT-L70
Explanation of symbols used in the manual:
- This symbol deno es especially impor an guidelines concerning he ins alla ion and
opera ion of he device. No complying wi h he guidelines deno ed by his symbol
may cause an acciden , damage or equipmen des ruc ion.
IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS
RESPONSIBLE FOR POSSIBLE DAMAGES.
- This symbol deno es especially impor an charac eris ics of he uni .
Read any informa ion regarding his symbol carefully
1. BASIC REQUIREMENTS AND USER SAFETY
-The manufacturer is not responsible for any damages caused by
inappropriate installation, not maintaining the proper environmental
conditions and using the unit contrary to its assignment.
- Installation should be conducted by qualified personnel . During installation all
available safety requirements should be considered. The fitter is responsible for
executing the installation according to this manual, local safety and EMC
regulations.
- GND input of device should be connected to PE wire;
- The unit must be properly set-up, according to the application. Incorrect
configuration can cause defective operation, which can lead to unit damage or
an accident.
-If in the case of a unit malfunction there is a risk of a serious threat to the
safety of people or property additional, independent systems and
solutions to prevent such a threat must be used.
-The unit uses dangerous voltage that can cause a lethal accident. The unit
must be switched off and disconnected from the power supply prior to
starting installation of troubleshooting (in the case of malfunction).
- Neighbouring and connected equipment must meet the appropriate standards
and regulations concerning safety and be equipped with adequate overvoltage
and interference filters.
-Do not attempt to disassemble, repair or modify the unit yourself. The unit
has no user serviceable parts. Defective units must be disconnected and
submitted for repairs at an authorized service centre.
- In order to minimize fire or electric shock hazard, the unit must be protected
against atmospheric precipitation and excessive humidity.
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User manual - METER SRT-L70
- Do not use the unit in areas threatened with excessive shocks, vibrations, dust,
humidity, corrosive gasses and oils.
- Do not use the unit in areas where there is risk of explosions.
- Do not use the unit in areas with significant temperature variations, exposure to
condensation or ice.
- Do not use the unit in areas exposed to direct sunlight.
- Make sure that the ambient temperature (e.g. inside the control box) does not
exceed the recommended values. In such cases forced cooling of the unit must
be considered (e.g. by using a ventilator).
The unit is designed for operation in an industrial environment and must
not be used in a household environment or similar.
2. GENERAL CHARACTERISTICS
The RT-L70 meter is equipped with Pt 100/Pt 500/Pt 1000 type input, with automatic
connection recognition (two, three or four wire sensor). The measurement range spans from
-100 °C to + 00 °C, and input is fully linearised accordingly to PN-EN 0751+A2:1999
standard. Result is showed on 4-digit LED display.
Thanks to modern SMPS included in RT-L70, it can be powered from wide range of
supply voltages. The device is equipped with sensor supply output, and 3 relay outputs (2 NO,
and 1 NONC) which can be loaded up to max. 8A/250V.
The device has 5 buttons being used for main presets programming, additionally all
programming operations can be done using IR remote controller (IR remote is not a part of
RT-L70 in RS-485 communication interface allows user to read all internal registers, and
reconfigure device via PC with Modbus RTU protocol.
RT-L70 can be used for controlling and regulation of processes need proportional and
threshold control like: temperature processes (heating or cooling), valves controlling or other.
3. TECHNICAL DATA
Power supply voltage
(depending on version)
External fuse (required)
Power consumption
85...230...2 0V AC/DC; 50 ÷ 0 Hz (separated)
19...24...90V DC and 1 ...24...70V AC (separated)
T - type, max. 2 A
max. ,5 VA @ 85 ÷ 2 0V AC/DC
max. ,5 VA @ 1 V ÷ 70V AC
max. ,5 W @ 19V ÷ 90V DC
Measurement input Pt 100/ Pt 500/Pt 1000 type with automatic connection
recognition (2, 3 or 4-wires)
Measurement range -100°C ÷ + 00°C
Measurement accuracy ± 0,1% @ 25°C; ± one digit
Measurement wires resistance max. 20 Ω (every wire)
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User manual - METER SRT-L70
Temperature stability 50 ppm / °C
Outputs
relay:
sensor power supply:
3 (2 NO and 1 NONC), 8A/250V AC (cos ϕ = 1)
24V +5%, -10% / max. 100 mA, stabilized,
not separated from measurement inputs
Communication interface RS 485, 8N1 and 8N2, Modbus RTU, not separated
Baud rate 1200 bit/s ÷ 115200 bit/s
Display LED, 4 digit, 13mm height, red
Data memory non-volatile memory, EEPROM type
Protection level IP 20 (housing and connection clips)
Housing type
Housing material
Housing dimensions
DIN rail mounted (35 mm rail)
NORYL UL 94 V-0
72 x 91 x 59 mm
Operating temperature
(depending on version)
0°C to +50°C
or -20°C to +50°C
Storage temperature
(depending on version)
-10°C to +70°C
or -20°C to +70°C
Humidity
Altitude
5 to 90% no condensation
up to 2000 meters above sea level
Screws tightening max. torque 0,5 Nm
Max. connection leads diameter 2,5 mm2
Safety requirements according to: PN-EN 1010-1
installation category: II
pollution degree: 2
voltage in relation to ground: 300V AC
insulation resistance: >20MΩ
insulation strength between power supply and
input/output terminal: 1min. @ 2300V
insulation strength between relays terminal:
1min. @ 1350V
EMC according to: PN-EN 132 -1
This is a class A unit. In a residential or a similar area it can cause radio
frequency interference. In such cases the user can be requested to use
appropriate preventive measures.
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User manual - METER SRT-L70
4. DEVICE INSTALLATION
The unit has been designed and manufactured in a way assuring a high level of user
safety and resistance to interference occurring in a typical industrial environment. In order to
take full advantage of these characteristics installation of the unit must be conducted correctly
and according to the local regulations.
- Read the basic safety requirements on page 3 prior to starting the installation.
- Ensure that the power supply network voltage corresponds to the nominal
voltage stated on the unit’s identification label.
- The load must correspond to the requirements listed in the technical data.
- All installation works must be conducted with a disconnected power supply.
- Protecting the power supply connections against unauthorized persons must be
taken into consideration.
4.1. UNPACKING
After removing the unit from the protective packaging, check for transportation damage. Any
transportation damage must be immediately reported to the carrier. Also, write down the unit
serial number located on the housing and report the damage to the manufacturer.
Attached with the unit please find:
- user’s manual,
- warranty,
4.2. ASSEMBLY
- Disconnect the power supply prior to starting assembly.
- Check the connections are wired correctly prior to switching the unit on.
4.3. CONNECTION METHOD
Caution
- Installation should be conducted by qualified personnel . During installation all
available safety requirements should be considered. The fitter is responsible for
executing the installation according to this manual, local safety and EMC
regulations.
- The unit is not equipped with an internal fuse or power supply circuit breaker.
Because of this an external time-delay cut-out fuse with a small nominal current
value must be used (recommended bipolar, max. 2A) and a power supply circuit-
breaker located near the unit. In the case of using a monopolar fuse it must be
mounted on the phase cable (L).
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User manual - METER SRT-L70
- The power supply network cable diameter must be selected in such a way that in
the case of a short circuit of the cable from the side of the unit the cable shall be
protected against destruction with an electrical installation fuse.
- Wiring must meet appropriate standards and local regulations and laws.
- In order to secure against accidental short circuit the connection cables must be
terminated with appropriate insulated cable tips.
- Tighten the clamping screws. The recommended tightening torque is 0.5 Nm.
Loose screws can cause fire or defective operation. Over tightening can lead to
damaging the connections inside the units and breaking the thread.
- In the case of the unit being fitted with separable clamps they should be inserted
into appropriate connectors in the unit, even if they are not used for any
connections.
- Unused terminals (marked as n.c.) must not be used for connecting any
connecting cables (e.g. as bridges), because this can cause damage to the
equipment or electric shock.
- If the unit is equipped with housing, covers and sealing to, protecting against
water intrusion, pay special attention to their correct tightening or clamping. In the
case of any doubt consider using additional preventive measures (covers, roofing,
seals, etc.). Carelessly executed assembly can increase the risk of electric shock.
- After the installation is completed do not touch the unit’s connections when it is
switched on, because it carries the risk of electrical shock.
Due to possible significant interference in industrial installations appropriate measures
assuring correct operation of the unit must be applied. To avoid the unit of improper
indications keep recommendations listed below.
–Avoid running signal cables and transmission cables together with power supply cables
and cables controlling inductive loads (e.g. contactors). Such cables should cross at
a right angle.
–Contactor coils and inductive loads should be equipped with interference protection
systems, e.g. RC-type.
–Use of screened signal cables is recommended. Signal cable screens should be
connected to the earthing only at one of the ends of the screened cable.
–In the case of magnetically induced interference the use of twisted pair of signal cables is
recommended. Twisted pair (best if shielded) must be used with RS-485 serial
transmission connections.
–In the case of measurement or control signals are longer than 30m or go outside of the
building then additional safety circuits are required.
–In the case of interference from the power supply side the use of appropriate interference
filters is recommended. Bear in mind that the connection between the filter and the unit
should be as short as possible and the metal housing of the filter must be connected to
the earth with the largest possible surface. The cables connected to the filter output must
not be run with cables with interference (e.g. circuits controlling relays or contactors).
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User manual - METER SRT-L70
Connections of power supply voltage and measurement signals are executed using the
screw connections on the top and bottom of the unit’s housing.
Figure 4.1. Me hod of cable insula ion replacing and cable erminals
All connections must be made while power supply is disconnected !
Figure 4.2. Terminals descrip ion
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15 16 17 18 19 20 21 22 23 24
GND
DATA+
DATA-
R - 485
n.c. n.c. n.c.
-Uo +
+24V +5%, -10%
Imax = 100mA
Pt100/500/1000
R2 R3
Pt100/500/1000
21 22 23 24
n.c.
n.c. n.c.
13 14
3 4 5 6 7 8 9 10 11 121 2
Power
supply
(depend on version)
R1
n.c.
Pt100/500/1000
21 22 23 24
n.c. n.c
-7 mm
max. 2 mm

User manual - METER SRT-L70
Depending on version:
85...230...260V AC/DC or
19...24...90V DC; 16...24...70V AC
Figure 4.3. Connec ion of power supply and relays
Contacts of relay outputs are not equipped with spark suppressors. While use
the relay outputs for switching of inductive loads (coils, contactors, power
relays, electromagnets, motors etc.) it is required to use additional
suppression circuit (typically capacitor 47nF/ min. 250VAC in series with
100R/5W resistor), connected in parallel to relay terminals or (better) directly
on the load. In consequence of using the suppression circuit, the level of
generated electromagnetic disturbances is lower, and the life of relay contacts
rises.
a) b)
Figure 4.4. Examples of suppression circui connec ion:
a) o relay erminals; b) o he induc ive load
Temperature sensor can be connected to the device in typical 4-wire circuit (Figure 4.5a)
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N
8 9 8 9
LL
N
!
FU E
L N
L N
FU E
R1 R2 R3
n.c. n.c. n.c.
3 4 5 6 7 8 9 10 11 121 2

User manual - METER SRT-L70
or 3-wire circuit (Figure 4.5b). Due to precision of measurement 4-wire circuit is
recommended.
If 2 wire circuit is used it is recommended to connect sensor accordingly to Figure
4.5c. In this case, the resistance of wires should be as small as possible, to avoid of
measurement errors. Measured value can be corrected (constant correction) using
„toF ” parameter from menu „inPt”. Due to low precision 2-wire connection is not
recommended.
When 4-wires or 2-wires connection is used, the resistance of particular wires (Ra ÷ Rd)
CAN BE DIFFERENT. When 3-wires connection is used, the resistance of particular wires
(Ra ÷ Rd) MU T BE IDENTICAL to enable proper compensation of it's resistance. The
resistance of particular wire should not be greater than 20 Ω .
a) b) c)
Figure 4.5. Connec ion of sensors:
a) 4-wires circui ; b) 3-wires circui ; c) 2-wires circui ;
The connection circuit should not be changed while unit is powered. Every change
of connection while the unit is powered causes measurement errors by several
seconds after change.
4.4. MAINTENANCE
The unit does not have any internal replaceable or adjustable components available to
the user. Pay attention to the ambient temperature in the room where the unit is operating.
Excessively high temperatures cause faster ageing of the internal components and shorten the
fault-free time of the unit's operation.
In cases where the unit gets dirty do not clean with solvents. For cleaning use warm water with
small amount of detergent or in the case of more significant contamination ethyl or isopropyl
alcohol.
Using any other agents can cause permanent damage to the housing.
Product marked with this symbol should not be placed in municipal waste. Please
check local regulations for disposal of electronic products.
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Pt100
Ra Rb Rc Rd
Ra, Rb, Rc, Rd can be different
21 22 23 24
Pt100
Rb Rc Rd
22 242321
Rb = Rc = Rd
n.c.
i
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Pt100
Rb Rc
22 2321 24
Rb, Rc can be different
n.c. n.c.

User manual - METER SRT-L70
5. FRONT PANEL DESCRIPTION
Symbols and functions of push-buttons:
Symbol used in the manual: [E C] or [E C/R1]
Functions:
• Preview or change of relay R1 threshold
• Exit the current level and Enter to previous menu (or measure mode)
• Cancel the changes made in parameter being edited
Symbol used in the manual: [ENTER] or [ENTER/R2]
Functions:
• Preview or change of relay R2 threshold
• Start to edit the parameter
• Enter to the sub-menu,
• Confirmation of changes made in parameter being edited
Symbol used in the manual: [RE ET] or [RE ET/R3]
Functions:
• Preview or change of relay R3 threshold
Symbol used in the manual: [^] [v]
Functions :
• First threshold value modification of selected relay in preview mode,
• Enter to main menu (press and hold both of them at least 2 sec)
• Change of the present menu,
• Modification of the parameter value,
6. PRINCIPLE OF OPERATION
After turning the power supply on, device ID and software version are showed on the
display, next the controller goes to the measurement mode.
6.1. MEASUREMENT MODE
In the measure mode, the measurement results, are displayed on the display. If the result
of measurement exceeds the permissible measurement range, warning ”-Hi-” or ”-Lo-” is
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R3
RE ET
R2
ENTER
R1
E C
AL R1 R2 R3
R2
ENTER
R1
E C
R3
RE ET
MENU
infrared
receiver
alarm LED indica or (AL)Thresholds exceeding
LED indica ors (R)
display
programming pushbu ons

User manual - METER SRT-L70
displayed rather than calculated result, depends on exceeded value. The warning can be
effect of measurement circuit malfunction. In that case “-Lo-” means shortcut and “-Hi-”
means break of measurement circuit.
In the measurement mode user can check main thresholds values. After pressing
[E C/R1], [ENTER/R2] or [RE ET/R3] button, particular threshold (R1, R2 or R3) value will
be displayed. After button release device returns to measure mode.
If a free access is enabled (see description of ”SECu” menu), user can change the
value of particular threshold pressing button [E C/R1], [ENTER/R2] or [RE ET/R3], and
using [^] and [v] buttons. Storage of new threshold value is done when particular button
([E C/R1], [ENTER/R2] or [RE ET/R3]) is released.
While modification of thresholds, in preview mode, the longer pressing of [^] and [v]
buttons, the quicker threshold changes.
All accessible parameters can be changed by entering the menu (see: DEVICE
PROGRAMMING). Use the local keyboard or the remote controller to do it. (Note: all
parameters can be remote changed via RS-485 interface).
Configuration of the device (via menu or RS-485 interface) do not stops measures.
6.2. DETECTION OF THE PEAK VALUES
The RT-L70 controller is equipped with peaks detection function. It can detect a peaks
of the input signal and display their values. Presets connected with this function are placed in
”HOLd” menu (see description of ”HOLd” menu). The detection of the peak can be done if
the measured signal raises and drops of value at least equal to parameter ”PEA”. Detected
peaks are displayed during the time defined by parameter ”timE”. If a new peak will be
detected while one is displayed, this new peak will be displayed and display time counter will
be cleared (Figure .1). If no peaks are detected while time ”timE” elapses, device starts to
show the current value of input signal again. If „Hdi ”=”HOLD” then setting parameter
"timE"=0.0 causes holding peak value until [E C] button is pressed. If „Hdi ”=”rEAL” then
value "timE"=0.0 means no holding. Displaying peak value is signalized by flashing most right
decimal point.
The relays/LEDs can be controlled depend on the current value of input signal or the
peak value (see ”HOLd” menu).
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User manual - METER SRT-L70
Figure 6.1. Process of peaks de ec ion
6.3. CONTROL OF THE RELAY OUTPUTS
The control of the object (measured signal) is realized via relay outputs. Front panel
LEDs named „R” indicates the state of particular relay output.
If device is not equipped with one or more relay outputs, menus refer to this relays
are available, but apply to LED indicators only. In such case LEDs indicates
exceeding of particular thresholds.
Modes of the control can be changed depend on the values of parameters “ EtP”, “ Et2”,
“HY t”, “modE”, “t on”, “toFF”, “unit” and “AL”. Depend on “modE” parameter, relays
can be not used or controlled over one or two thresholds values.
If one threshold is used (Figure .2) the relay can be turned on (“modE” = ”on”) or off
(“modE” = ”oFF”) when the input signal value is contained in zone A. If two thresholds are
used (Figure .3) the relay will be turned on when value of input signal is contained in zone A
(“modE” = ”in”) or zone B (“modE” = ”out”) and turned off if the signal is contained in the
second one.
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”timE”
measure
time
”timE”
”PEA”
”PEA”
real measurement result
display value
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User manual - METER SRT-L70
Figure 6.2. One hreshold con rol of he relay/LED ou pu s
Figure 6.3. Two hreshold con rol of he relay/LED ou pu s
The relay outputs and LEDs (named R) can be controlled depend on both - the
current value and the peak value (when peak detection is active) of the input signal.
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zone A
zone B
measure
”SEtP” parameter
”HYSt” parameter
state of
relay/LED
zone B
zone A
zone B
measure
”SEtP” or ”SEt2” parameter
”HYSt” parameter
state of
relay/LED
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User manual - METER SRT-L70
6.3.1. One threshold mode
Figure .4 presents the principle of relay outputs operation for one threshold mode, and
an example values of other parameters.
Description:
A, B, C, D - points where measured signal exceeds border values (expected value ± allowed deviation)
BON ,BOFF ,DON ,DOFF - relays state changes moments: (for “t on” > 0, “toFF” > 0)
tA , tB , tC , tD- time periods while input signal is in zone A or zone B
Figure 6.4. Principle of LED/relay ou pu opera ion for one hreshold mode
Parameter “ EtP” sets a threshold of the relay, and parameter “HY t” sets a
hysteresis of the relay (Figure .4 a). The relay can change his state only when input value
exceeds (over or under) border value and tA ,tB ,tC ,tD times (Figure .4) are bigger than the
time defined by parameters “t on”, “toFF” and “unit”. Border values means values equal
threshold+hysteresis and threshold-hysteresis respectively.
If “t on” and “toFF” parameters are set to “0”, then the relay state will be changed
as soon as input value exceeds any of the border values (see points A and C, Figure .4 a,
b, c).
If values of “t on” or/and “toFF” are positive, then relay state will be turned on if the
input value exceeds the border values and stay bigger (or lower) during at least
“t on” (see points BON, DON, Figure .4 a, d, e). Similarly, the relay will be turned off if time
“toFF” elapse since the input signal value exceeds any of the border values (see points
BOFF, DOFF, Figure .4 a, d, e).
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“ EtP” parameter
(expected signal value)
“HY t” parameter
(allowed signal
deviation)
measured
signal
displayed value
time
time
time
AB
CD
relay state
(modE = on
t on = 0
toFF = 0)
relay state
(modE = on
t on > 0
toFF > 0)
tAtBtCtD
BON
DOFF
relay state
(modE = oFF
t on = 0
toFF = 0)
relay state
(modE = oFF
t on > 0
toFF > 0)
“toFF”
parameter
“t on”
parameter
BOFF
DON
time
time
closed
open
a)
b)
c)
d)
e)
open
closed
open
open
closed
closed
“t on”
parameter
“toFF”
parameter
zone A
zone B

User manual - METER SRT-L70
If tA ,tB ,tC or tD (when input signal stay in zone A or zone B) are lower than parameters “t on”
or “toFF”, the relay will not change his state (see points A and C, Figure .4 a, d, e).
The state of relay output while the input value exceeds the border values (points A, B, C,
D) is described by parameter “modE”. The relay can be turned on (“modE” = ”on”), or
turned off (“modE” = ”oFF”) when input signal value is contained in zone A (Figure .4 a).
The parameter “AL” allow user to set the relay output behaviour in critical situations (e.
g. Input values exceeds permissible measurement range). User can select that the relays
will be turned on, turned off,or not changed in critical situations.
All parameters connected with relay outputs are described in paragraph ”rEL1” menu.
6.3.2. Two thresholds mode
Objaśnienie:
A, B, C, D, E - points where measured signal exceeds border values (expected value ± allowed deviation)
BON ,BOFF ,CON ,COFF ,EON ,EOFF - relays state changes moments: (for “t on” > 0, “toFF” > 0)
tA , tB , tC , tD , tE- time periods while input signal is in zone A or zone B
Figure 6.5. Principle of LED/relay ou pu opera ion for wo hresholds mode
16
EOFF “ EtP” or “ Et2”
parameter
“HY t” parameter
measure
d signal
displayed value
time
time
time
AB
C
D
relay state
(modE = in
t on = 0
toFF = 0)
relay state
(modE = in
t on > 0
toFF > 0)
tAtCtD
BON
relay state
(modE = out
t on = 0
toFF = 0)
relay state
(modE = out
t on > 0
toFF > 0)
“toFF” parameter
“t on” parameter
BOFF
EON
time
time
closed
open
a)
b)
c)
d)
e)
open
closed
open
open
closed
closed
“t on” parameter
“toFF” parameter
zone A
zone B
“HY t” parameter
zone B COFF CON
E
“t on” parameter
“toFF” parameter
tBtE

User manual - METER SRT-L70
Figure .5 presents the principle of relay outputs operation for two thresholds mode, and an
example values of other parameters. In this mode parameter “ Et2” is accessible in common
with “ EtP”, this parameter describes a second threshold of the relay output. The parameters
“HY t”, “modE”, “t on”, “toFF”, “unit” and “AL” are connected with both “ EtP” and
“ Et2” thresholds. While the controlling process, the relay output changes his state depends
of both “ EtP” and “ Et2” thresholds in similar way as it was described in one threshold
mode.
If two threshold mode is used, “modE” parameter defines state of the relay output when
the input value occurs in a particular zone defined by border values of both thresholds. The
relay can be turned on if the input value is contained in zone A (“modE” = ”in”) or zone B
(“modE” = ”out”) and turned off if it is contained in the second one (Figure .5).
The sequence of thresholds “ EtP” and “ Et2” can be set in any order, due to the
control of relay outputs is done depend on difference between thresholds values
(zone A ) and outside of threshold values (zone B).
7. DEVICE PROGRAMMING
The device menu allow user to set all parameters connected to operation of
measurement input, control modes, critical situations behaviour, communication via RS-485
and access settings. The meaning of the particular parameters is described in paragraph
MENU DESCRIPTION.
Some of the parameters can be accessed without menu entering (quick view mode).
After pressing [^] or [v] button, name of the threshold (e.g.”rEL1”) and his value will be
displayed on the display in alternating mode. If [^] or [v] will be pressed in 5 sec again, the
next threshold will be displayed, else the device comes back to the measurement mode. If a
free access is enabled (see description of ”SECu” menu), user can change the value of
particular threshold pressing button [ENTER] (see: PARAMETERS EDITION).
If particular parameter has been changed and confirmed in quick view mode, its
new value is displayed in alternating mode with parameter name by few seconds.
Confirmed changes may be checked or user can switch viewed parameter pressing
[^] or [v] button.
7.1. PROGRAMMING MENU
To enter main menu (being in the measurement mode) operator must to press and hold
at least 2 sec. [^] and [v] buttons (simultaneously).
If the user password is defined (see parameter “ cod“, menu ”SECU”), operator have
to enter correct one before proceeding to menu options . Entering of the passwords is similar
to the edition of numeric parameters (see: PARAMETERS EDITION ), however presently editing
digit is showed only on the display, other digits are replaced by “-” sign.
After entering of last digit of the password first menu position will be displayed (if the password
is correct) or warning ”Err” in other case.
Pay attention when device parameters are being changed. If it is possible, turn off
controlled installation (machine).
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Functions of the buttons while sub-menu and parameters choice:
Selection of sub-menu or parameter for editing. Name of selected item (sub-
menu or parameter) is displayed.
Operation of [ENTER / R2] button depend on present menu position:
• if the name of some sub-menu is displayed - enter this sub-menu; name
of the first parameter (or next level sub-menu) is displayed,
• if the name of some parameter is displayed - enter the edition of this
parameter; present value of the parameter is displayed,
[E C / R1] button allow user to exit present menu level and goes to upper
level menu (or measurement mode).
After about 1 min. since last use of the buttons, device exits the menu mode and
returns to the measurement mode (only if no parameters are in editing mode).
7.2. PARAMETERS EDITION
To start edition of any parameter user should select name of desired one using [^] [v]
buttons and then press [ENTER].
7.2.1. Numeric parameters (digit change mode)
Numerical parameters are displayed as decimal numbers. The mode of its new value
entering depends on chosen edit method ( see parameter „Edit”).
In mode “by digit” („Edit”=”dig”) pressing one of the keys [^] or [v] causes change of
current position (flashing digit) or the sign (+/-). Short pressing of the [ENTER] button causes
change of the position (digit).
Press [ENTER] at least 2 seconds to accept the changes, after that question ” Et?” is
displayed, and user must to confirm (or cancel) the changes. To conform changes (and story it
in EEPROM) press [ENTER] button shortly after ” Et?” is displayed. To cancel the changes
press [E C] button shortly after ” Et?” is displayed. After that device returns to the menu.
7.2.2. Numeric parameters (slide change mode)
In “slide change” mode („Edit”=” lid”), buttons [^] and [v] has different functions.
To increase edited value press (or press and hold) [^] button only, the increasing
became quickest as long as button [^] is pressed. To slow down the increasing, button [v] can
be used. If [v] is pressed shortly (and button [^] is still pressed), increasing slow down for
a moment only, if [v] is pressed and held while button [^] is still pressed the increasing slow
down and will be kept on lower speed.
To decrease edited value press (or press and hold ) [v] button only. The decreasing
became quickest as long as button [v] is pressed. To slow down the decreasing, button [^]
can be used. If [^] is pressed shortly (and button [v] is still pressed), decreasing slow down for
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a moment only, if [^] is pressed and held while button [v] is still pressed the decreasing slow
down and will be kept on lower speed.
Press [ENTER] at least 2 seconds to accept the changes, after that question ” et?” is
displayed, and user must to confirm (or cancel) the changes. To conform changes (and story it
in EEPROM) press [ENTER] button shortly after ” Et?” is displayed. To cancel the changes
press [E C] button shortly after ” Et?” is displayed. After that device returns to the menu.
7.2.3. Switch parameters (“LIST” type)
Switch parameters can be described as a sets of values (a lists) out of which only one of
the options available on the list can be selected for the given parameter. Options of switching
parameter are selected using [^], [v] keys.
Short pressing of [ENTER] causes in displaying of the acknowledge question (” Et?”). If
key [ENTER] is pressed again, the changes are accepted, stored in EEPROM end the edition
process finished. Pressing the key [E C] after ” Et?” causes in cancelling of made changes
and returning to menu.
Functions of buttons when editing numeric and switching parameters:
Change of current (flashing) digit value while editing numeric parameter, or
value of switch parameter.
If numerical parameter is being edited, a short press of [ENTER / R2] button
change edited position. A long press of [ENTER / R2] button (at lest 2 sec.)
causes of display a ” Et?” ask, which allow user to make sure if change of
the parameter value is correct. If switch parameter is being edited, a short
press of [ENTER / R2] button causes of display a ” Et?” ask. When
[ENTER / R2] button is pressed again (while ” Et?” is displayed) the new
value of the parameter is stored in EEPROM memory.
Pressing this button operator can cancel the changes done up to now (if they
were not approved by [ENTER / R2] button after the ” Et?” ask) and come
back to menu
7.3. MENU DESCRIPTION
“- - - -” - password checking. If some password different from „0000” is set, then every
enter to main menu follows the entering of password. If entered password is
correct then first menu position will be displayed else warning ”Err”, and unit
returns to measurement mode.
Due to problem with direct displaying of “m” and “K” letters, they are exchanged
with special signs “ “ for “m” and “ “ for K respectively. However, in user manual
letters „m” and “K” are used to make it more readable (example: “modE”, “tc K”).
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7.3.1. “rEL1” menu
This menu allows to configure the operation mode of relays and LEDs marked „R” (e.g. „R1”).
If there are few relay outputs available, then every output has its own configuration menu
(e.g. menu „rEL2” for relay (LED) „R2”). Principle of the relays operation is described in
paragraph CONTROL OF THE RELAY OUTPUTS.
• The relay outputs and LEDs (named R) can be controlled depend on both - the
current value and the peak value (when peak detection is active) of the input
signal.
•If device is not equipped with one or more relay outputs, menus refer to this
relays are available, but apply to LED indicators only. In such case LEDs
indicates exceeding of particular thresholds.
“ EtP” - first threshold of the relay (range -999 ÷ 9999). Negative values can be input by
selecting a “-” sign on first digit (to change value use [^] and [v] buttons).
Threshold is the medium value of relay hysteresis.
“ Et2” - second threshold of the relay (range -999 ÷ 9999). Negative values can be input
by selecting a “-” sign on first digit ( to change value use [^] and [v] buttons). This
threshold is accessible when ”modE” parameter is set to „in” or „out” value.
Threshold is the medium value of relay hysteresis.
“HY t” - hysteresis of relay (range 0 ÷ 999). Full hysteresis of the relay is equal to 2x
“HY t” parameter. The relay state can change when an input signal is out of
threshold-hysteresis to threshold+hysteresis zone.
Presented parameters should be set to ensure that ” EtP” + ”HY t”,
” Et2” + ”HY t”, ” EtP” - ”HY t” or ” Et2” - ”HY t” do not exceeds the
measure range. Additionally, in two threshold mode (“modE”= „in” or „out”), the
hysteresis for both thresholds must not cover each other (in other case relay can't
change his state).
“modE” - relay operation mode:
“noAC” - the relay is not active (permanent turned off)
“on” - one threshold mode, the relay is turned ON when input signal exceeds
EtP + HY t value, and is turned off back when the input signal became
lower than EtP – HY t,
“oFF” - one threshold mode, the relay is turned OFF when input signal exceeds
EtP + HY t value, and is turned on back when the input signal became
lower than EtP – HY t,
“in” - two threshold mode, the relay is turned ON when the input signal is
bigger than “lower threshold + HY t” and lower than “bigger
threshold – HY t”, and turned off when the input signal is contained in
the second zone. The bigger threshold means bigger one of “ EtP”
and “ Et2” thresholds, the lower threshold” means lower one of
“ EtP” and “ Et2” thresholds.
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