Simex Simpact SRP-77 User manual

SIMEX®
USER MANUAL for
meter with U/I input
family:
type: SRP-
firmware version: 5.14 or higher
Read the user's manual carefully before starting to use the unit.
Producer reserves the right to implement changes without prior notice.
13. 1.2 9 V.2. 2

User manual for meter with U/I input SRP-77
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...................................................................................................................8
4.4. MAINTENANCE................................................................................................................................14
5. FRONT PANEL DESCRIPTION................................................................................................................14
6. PRINCIPLE OF OPERATION....................................................................................................................15
6.1. MEASUREMENT MODE..................................................................................................................15
6.2. DETECTION OF THE PEAK VALUES.............................................................................................16
6.3. CONTROL OF THE RELAY OUTPUTS...........................................................................................16
6.3.1. On thr shold mod ................................................................................................................18
6.3.2. Two thr sholds mod ..............................................................................................................19
7. DEVICE PROGRAMMING.........................................................................................................................20
7.1. PROGRAMMING MENU...................................................................................................................20
7.2. PARAMETERS EDITION..................................................................................................................21
7.2.1. Num ric param t rs (digit chang mod )...............................................................................21
7.2.2. Num ric param t rs (slid chang mod )..............................................................................21
7.2.3. Switch param t rs (“LIST” typ )..............................................................................................22
7.3. MENU DESCRIPTION......................................................................................................................22
7.3.1. “rEL1” m nu.............................................................................................................................23
7.3.2. “inPt” m nu..............................................................................................................................25
7.3.3. ”bri” param t r.........................................................................................................................27
7.3.4. ”HOLd” m nu...........................................................................................................................27
7.3.5. ”SECu” m nu...........................................................................................................................28
7.3.6. ”rS” m nu.................................................................................................................................28
7.3.7. ”Edit” param t r.......................................................................................................................30
7.3.8. ”dEFS” param t r....................................................................................................................30
7.3.9. ”SErv” m nu.............................................................................................................................30
7.4. MENU STRUCTURE........................................................................................................................31
. THE ALARM LED......................................................................................................................................33
9. OVER-CURRENT PROTECTION..............................................................................................................33
10. DISPLAYED VALUES CALCULATION..................................................................................................33
10.1. ADDITIONAL CALCULATIONS (USED CONVERSION CHARACTERISTIC)..............................33
10.1.1. Lin ar charact ristic..............................................................................................................34
10.1.2. Squar charact ristic.............................................................................................................34
10.1.3. Squar root charact ristic.....................................................................................................35
10.1.4. Us r d fin d charact ristic....................................................................................................35
10.2. EXAMPLES OF CALCULATIONS..................................................................................................36
11. THE MODBUS PROTOCOL HANDLING................................................................................................39
11.1. LIST OF REGISTERS.....................................................................................................................39
11.2. TRANSMISSION ERRORS DESCRIPTION...................................................................................42
11.3. EXAMPLES OF QUERY/ANSWER FRAMES................................................................................42
12. DEFAULT AND USER'S SETTINGS LIST..............................................................................................45
2

User manual for meter with U/I input SRP-77
Explanation of symbols used in the manual:
- This symbol d not s sp cially important guid lin s conc rning th installation and
op ration of th d vic . Not complying with th guid lin s d not d by this symbol
may caus an accid nt, damag or quipm nt d struction.
IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS
RESPONSIBLE FOR POSSIBLE DAMAGES.
- This symbol d not s sp cially important charact ristics of th unit.
R ad any information r garding this symbol car fully
1. BASIC REQUIREMENTS AND USER SAFETY
- The manufacturer is not responsible for any damages caused by
inappropriate installation, not maintaining the proper technical condition
and using the unit against its destination.
- 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 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 defect of unit operation 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 mating equipment must meet the requirements of appropriate
standards and regulations concerning safety and be equipped with adequate
anti-overvoltage and anti-interference filters.
- Do not attempt to disassemble, repair or modify the unit yourself. The unit
has no user serviceable parts. Units, in which a defect was stated 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.
- Do not use the unit in areas threatened with excessive shocks, vibrations, dust,
humidity, corrosive gasses and oils.
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User manual for meter with U/I input SRP-77
- Do not use the unit in explosion hazard areas.
- Do not use the unit in areas with significant temperature variations, exposed to
condensation or icing.
- 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 SRP- meter is equipped with one current input -2 / 4-2 mA and one voltage
input -5 / 1-5 / -1 / 2-1 V. Current input has additionally overcurrent protection circuit,
which protects standard resistor. The selection of active input is realised by software, and
selected input can be changed at any time. Additionally the SRP- allows user to select a
conversion characteristic of several kinds: linear, square, square root, and user defined
(max.2 points length). Result is showed on 4-digit LED display. Displayed values range can
be selected by user, from -999 to 9999, plus decimal point.
The device can be equipped with one or two relay (or OC type) outputs. Device SRP-
is equipped with RS-485 / Modbus RTU communication interface and sensor supply output.
The meter can be ordered in two power supply versions.
SRP- 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...26 V AC/DC; 5 ÷ 6 Hz
or 19...24...5 V DC; 16...24...35V AC
T - type, max. 2 A
max. 4.5 VA @ 85 ÷ 26 V AC/DC
max. 4.5 VA @ 16V ÷ 35V AC
max. 4.5 W @ 19V ÷ 5 V DC
Current input ÷2 mA, 4÷2 mA overload protected,
maximum input current about 4 mA
Current measurement accuracy ± .25% ± one digit (for ÷2 mA range)
Current input resistance < 65 Ω (typical 55 Ω)
Voltage input ÷5 V, 1÷5 V, ÷1 V, 2÷1 V
Voltage measurement accuracy ± .25% ± one digit (for ÷1 V range)
Voltage input resistance > 5 kΩ
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User manual for meter with U/I input SRP-77
Display range -999 ÷ 9999, plus decimal point
Accepted prolonged input overload: 2 %
Outputs
relay:
or OC-type:
sensor power supply:
, 1 or 2 NO, 1A/25 V AC (cos ϕ = 1)
, 1 or 2 3 mA / 3 VDC / 1 mW
24V +5%, -1 % / max. 1 mA, stabilized
Communication interface RS 485, 8N1 and 8N2, Modbus RTU, not separated
Baud rate 12 bit/s ÷ 1152 bit/s
Display (double) LED, first: 4 digit, 13mm height, red
second: 4 digit, 1 mm height, green
Data memory non-volatile memory, EEPROM type
Protection level IP 65 (from front, after using waterproof cover)
IP 4 (from front)
IP 2 (housing and connection clips)
Housing type
Housing material
Housing dimensions
Mounting hole
Assembly depth
Panel thickness
panel
NORYL - GFN2S E1
72 x 72 x 1 mm
66.5 x 66.5 mm
min. 1 2 mm
max. 5 mm
Operating temperature
Storage temperature
°C to +5 °C
-1 °C to +7 °C
Humidity
Altitude
5 to 9 % no condensation
up to 2 meters above sea level
Screws tightening max. torque ,5 Nm
Max. connection leads diameter 2,5 mm2
Safety requirements according to: PN-EN 61 1 -1
installation category: II
pollution degree: 2
voltage in relation to ground: 3 V AC
insulation resistance: >2 MΩ
insulation strength between power supply and
input/output terminal: 1min. @ 23 V
insulation strength between relays terminal:
1min. @ 135 V
EMC according to: PN-EN 61326
5

User manual for meter with U/I input SRP-77
This is a class A unit. In housing or a similar area it can cause radio
frequency interference. In such cases the user can be requested to use
appropriate preventive measures.
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 clamps 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 on the housing and report the damage to the manufacturer.
Attached with the unit please find:
- user’s manual,
- warranty,
- assembly brackets - 2 pieces.
4.2. ASSEMBLY
- The unit is designed for mounting indoor inside housings (control panel,
switchboard) assuring appropriate protection against electric impulse waves.
Metal housing must be connected to the grounding in a way complying with the
governing regulations.
- Disconnect the power supply prior to starting assembly.
- Check the correctness of the performed connections prior to switching the unit on.
In order to assembly the unit, a 66.5 x 66.5 mm mounting hole (Figure 4.1) must be
prepared. The thickness of the material of which the panel is made must not exceed
5mm. When preparing the mounting hole take the grooves for catches located on
both sides of the housing into consideration (Figure 4.1). Place the unit in the
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User manual for meter with U/I input SRP-77
mounting hole inserting it from the front side of the panel, and then fix it using the
brackets (Figure 4.2). The minimum distances between assembly holes’ axes - due
to the thermal and mechanical conditions of operation - are 91mm x 91mm
(Figure 4.3).
Figur 4.1. Mounting hol dim nsions
Figur 4.2. Installing of brack ts, and dim nsions of conn ctors.
7
66,5 mm
13 mm
8 mm
8 mm
13 mm
1 mm max. 5 mm
66,5 mm
1 mm
92 mm
5 mm 12 mm 1 mm
8,5 mm
16 mm

User manual for meter with U/I input SRP-77
Figur 4.3. Minimum distanc s wh n ass mbly of a numb r of units
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 minimal possible 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).
- 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 .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 clamps (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.
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91 mm
91 mm

User manual for meter with U/I input SRP-77
- If the unit is equipped with housing, covers and sealing packing, 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 common (parallel) leading of signal cables and transmission cables together with
power supply cables and cables controlling induction loads (e.g. contactors). Such cables
should cross at a right angle.
–Contactor coils and induction loads should be equipped with anti-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 couples of signal
cables (so-called “spirals”) is recommended. The spiral (best if shielded) must be used
with RS-485 serial transmission connections.
–In the case of interference from the power supply side the use of appropriate anti-
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 earthing with largest possible surface. The cables connected to the filter
output must not run in parallel with cables with interference (e.g. circuits controlling relays
or contactors).
Connections of power supply voltage and measurement signals are executed using the
screw connections on the back of the unit’s housing.
Figur 4.4. M thod of cabl insulation r placing and cabl t rminals
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max. 2 mm

User manual for meter with U/I input SRP-77
Figur 4.5. T rminals d scription (r lay outputs)
Figur 4.6. T rminals d scription (OC-typ outputs)
All connections must be made while power supply is disconnected !
0
1 2
106 8 9
18 19 2013 14
R1
(optional)
3 4
R2
(optional)
116
n.c.
n.c.
GND DATA+
DATA-
RS - 485
+ Uo -
+24V +5%, -1 %
Imax = 1 mA
GND
0/1 - 5V, 0/2 - 10V
0/4-20mA
++
Power
supply
(depending on version)
1 2
106 8 9
18 19 2013 14
3 4
116
n.c.
n.c.
GND DATA+
DATA-
RS - 485
+ Uo -
+24V +5%, -1 %
Imax = 1 mA
GND
0/1 - 5V, 0/2 - 10V
0/4-20mA
++
OC1, OC2:
Umax = 3 V DC
Imax = 3 mA
Pmax = 1 mW
- +
OC1
(optional)
- +
OC2
(optional)
Power
supply
(depending on version)
!

User manual for meter with U/I input SRP-77
Figur 4.7. Conn ction of 2-wir curr nt conv rt rs
Figur 4.8. Conn ction of 3-wir curr nt conv rt rs
Figur 4.9. Conn ction of voltag conv rt rs
6 8 9 10
16 1 24V DC
- +
+ -
+
-
+
-
internally connected
6 8 9 10
+ -
16 1
-
+
+
-
24V DC
- +
internally connected
6 8 9 10 6 8 9 10
16 1
- +
-
+
+
24V DC
- +
-
+
+
internally connected
6 8 9 10 6 8 9 10

User manual for meter with U/I input SRP-77
D p nding on v rsion:
85...230...260V AC/DC or
19...24...50V DC; 16...24...35V AC
Figur 4.10. Conn ction of pow r supply and r lays
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 4 nF/ 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.
2
FUSE
1 2
L N
L N
3 4
13 14
FUSE
R1
R2
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User manual for meter with U/I input SRP-77
a) b)
Figur 4.11. Exampl s of suppr ssion circuit conn ction:
a) to r lay t rminals; b) to th inductiv load
Figur 4.12. Exampl of OC-typ outputs conn ction
3
16 1
Uo
3 4
OC1
- + + -
+
voltage input
24 V
-
Logic controller
16 1
Uo
3 4
OC1
- +
+ -
R
2k2
LED 10 mA
!
N
3 4 3 4
LL
N
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User manual for meter with U/I input SRP-77
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 unit 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 and electronic products.
5. FRONT PANEL DESCRIPTION
Symbols and functions of push-buttons:
Symbol used in the manual: [ESC/MENU]
Functions:
• Enter to main menu ( press and hold by at least 2 sec.)
• 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]
Functions :
• Start to edit the parameter
• Enter to the sub-menu,
• Confirmation of changes made in parameter being edited
Symbol used in the manual: [^] [v]
Functions :
• Change of the present menu,
• Modification of the parameter value,
• Change of the display mode.
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MENU
ESC
ENTER
MENU
ESC ENTER
R2
S2
AL R1
S1
Thr sholds xc ding
LED indicators (R)
alarm LED indicator (AL)
programming pushbuttons
main display
Curr nt thr shold numb r
LED indicators (S)
s cond display

User manual for meter with U/I input SRP-77
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, converted over selected characteristic,
are displayed on the LED display. The measurement range equal to the nominal range is
called: nominal measurement range, and the measurement range equal to the extended
nominal range is called: permissible measurement range (Figure 6.1, 6.2).
Figur 6.1. D finitions of m asur m nt rang s in mod 4 ÷ 20mA
If the result of measurement exceeds the permissible measurement range, warning ”-Hi-” or
”-Lo-” is displayed rather than input signal, depends on exceeded value (see description of
“Lo r” i “Hi r” parameters, paragraph ”inPt” menu).
Figur 6.2. D finitions of m asur m nt rang s in mod 0 ÷ 20mA
If the measurement value do not exceeds permissible measurement range but
displayed value exceeds range -999 ÷ 9999, the warning ”-Ov-” is displayed rather
than the calculated result.
The measurement results are displayed on the main display. ”-Hi-”, ”-Lo-” and ”-Ov-”
messages are displayed on the second display. At the same time symbol ”- - - -” is displayed
on the main display. If the measurement result is in the allowed range, second display is
dimmed or shows one of the relay thresholds (selected threshold is signalized by LEDs
marked S1 and S2). If a free access is enabled (see description of ”SECu” menu), user can
change the value of particular threshold pressing [ENTER] button (see: PARAMETERS
EDITION). After power on second display is dimmed, and it's operation mode can be changed
5
”Lo r” parameter ”Hi r” parameter
4 mA 2 mA
permissible measurement range
nominal measurement range
”Hi r” parameter
mA 2 mA
permissible measurement range
nominal measurement range
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User manual for meter with U/I input SRP-77
using [^] and [v] buttons.
Input type, range of displaying values, characteristic of conversion, decimal point position
and measure filtering ratio, are user configurable parameters. 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 SRP- 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 6.3). If no peaks are detected while time ”timE” elapses, device starts to
show the current value of input signal again.
The relays/LEDs can be controlled depend on the current value of input signal or the
peak value (see ”HOLd” menu).
Figur 6.3. Proc ss of p aks d t ction
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.
6
”timE”
measure
time
”timE”
”PEA”
”PEA”
real measurement result
display value
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User manual for meter with U/I input SRP-77
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 “SEtP”, “SEt2”,
“HYSt”, “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 6.4) 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 6.5) 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.
Figur 6.4. On thr shold control of th r lay/LED outputs
Figur 6.5. Two thr shold control of th r lay/LED 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.
7
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 for meter with U/I input SRP-77
6.3.1. One threshold mode
Figure 6.6 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” > , “toFF” > )
tA , tB , tC , tD- time periods while input signal is in zone A or zone B
Figur 6.6. Principl of LED/r lay output op ration for on thr shold mod
Parameter “SEtP” sets a threshold of the relay, and parameter “HYSt” sets a
hysteresis of the relay (Figure 6.6 a). The relay can change his state only when input value
exceeds (over or under) border value and tA ,tB ,tC ,tD times (Figure 6.6) 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 “ ”, then the relay state will be changed
as soon as input value exceeds any of the border values (see points A and C, Figure 6.6 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 6.6 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 6.6 a, d, e).
8
“SEtP” parameter
(expected signal value)
“HYSt” parameter
(allowed signal
deviation)
measured
signal
displayed value
time
time
time
AB
CD
relay state
(modE = on
t on =
toFF = )
relay state
(modE = on
t on >
toFF > )
tAtBtCtD
BON
DOFF
relay state
(modE = oFF
t on =
toFF = )
relay state
(modE = oFF
t on >
toFF > )
“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 for meter with U/I input SRP-77
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 6.6 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 6.6 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” > , “toFF” > )
tA , tB , tC , tD , tE- time periods while input signal is in zone A or zone B
Figur 6.7. Principl of LED/r lay output op ration for two thr sholds mod
9
EOFF “SEtP” or “SEt2”
parameter
“HYSt” parameter
measure
d signal
displayed value
time
time
time
AB
C
D
relay state
(modE = in
t on =
toFF = )
relay state
(modE = in
t on >
toFF > )
tAtCtD
BON
relay state
(modE = out
t on =
toFF = )
relay state
(modE = out
t on >
toFF > )
“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
“HYSt” parameter
zone B COFF CON
E
“t on” parameter
“toFF” parameter
tBtE

User manual for meter with U/I input SRP-77
Figure 6.7 presents the principle of relay outputs operation for two thresholds mode, and an
example values of other parameters. In this mode parameter “SEt2” is accessible in common
with “SEtP”, this parameter describes a second threshold of the relay output. The parameters
“HYSt”, “modE”, “t on”, “toFF”, “unit” and “AL” are connected with both “SEtP” and
“SEt2” thresholds. While the controlling process, the relay output changes his state depends
of both “SEtP” and “SEt2” 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 6.7).
The sequence of thresholds “SEtP” and “SEt2” 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).
If the measurement result is in the allowed range, second display is dimmed or shows one of
the relay thresholds (selected threshold is signalized by LEDs marked S1 and S2). To select
other threshold use [^] and [v] buttons. If a free access is enabled (parameter ”AccE” = on),
user can change the value of particular threshold pressing [ENTER] button (see:
PARAMETERS EDITION).
7.1. PROGRAMMING MENU
To enter main menu (being in the measurement mode) operator must to press and hold
at least 2 sec. [ESC/MENU] button.
If the user password is defined (see parameter “Scod“, 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).
20
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