Simex STI-73 User manual

Assisting the automation
industry since 1986
User manual
RATEMETER
STI-7
•Firmware: v.5.11 or higher
•Input type: pulse
•Rotational / linear speed control
Read the user's manual carefully before starting to use the unit or software.
Producer reserves the right to implement changes without prior notice.
2016.0 .01 STI-73_INSSXEN_v.2.07.002

User manual - RATEMETER STI-73
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................................................................................................................................12
5. FRONT PANEL DESCRIPTION................................................................................................................13
6. PRINCIPLE OF OPERATION...................................................................................................................14
6.1. MEASUREMENT MODE..................................................................................................................14
6.2. DETECTION OF THE PEAK VALUES............................................................................................15
6.3. CONTROL OF THE RELAY OUTPUTS..........................................................................................16
6.3.1. On thr shold mod ................................................................................................................17
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. “rELAy1” m nu........................................................................................................................22
7.3.2. “inPUt” m nu...........................................................................................................................24
7.3.3. “FiLtEr” m nu..........................................................................................................................26
7.3.4. ”briGHt” param t r..................................................................................................................26
7.3.5. ”HOLd” m nu...........................................................................................................................27
7.3.6. ”SECU” m nu..........................................................................................................................27
7.3.7. ”rS-485” m nu.........................................................................................................................28
7.3.8. ”Edit t” param t r....................................................................................................................29
7.3.9. ”dEFS” param t r....................................................................................................................29
7.3.10. ”SErv” m nu..........................................................................................................................29
7.4. MENU STRUCTURE........................................................................................................................30
. THE ALARM LED......................................................................................................................................32
9. EXAMPLES OF ”MUL” AND ”DIV” PARAMETERS CALCULATION...................................................32
10. THE MODBUS PROTOCOL HANDLING...............................................................................................33
10.1. LIST OF REGISTERS....................................................................................................................33
10.2. TRANSMISSION ERRORS DESCRIPTION..................................................................................35
10.3. EXAMPLES OF QUERY/ANSWER FRAMES...............................................................................36
11. DEFAULT AND USER'S SETTINGS LIST.............................................................................................3
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User manual - RATEMETER STI-73
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
-


- 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.
- 


- 


- Neighbouring and connected equipment must meet the appropriate standards
and regulations concerning safety and be equipped with adequate overvoltage
and interference filters.
-


- 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 - RATEMETER STI-73
- 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).


2. GENERAL CHARACTERISTICS
The main purpose of !"#tachometer is measuring of the linear and rotational speed.
The device can be used as frequency meter as well.
Main feature of the tachometer is high precision of measurement (0.02% in full
temperature range). User can set input divider in range 1 to 19 999 and additional scale
coefficients.
The device can be equipped with one relay (or OC type) output. This output can be
controlled depend on momentary value of rotational speed. Device type !"# is equipped
with RS-4 5 / Modbus RTU communication interface and sensor supply output. The meter can
be ordered in two power supply versions.
Additional features:
• settable width of measurement window ( from 0.1 to 39.9 seconds),
• possible direct access to relay thresholds values,
• additional multiply and division coefficients for result scaling.
3. TECHNICAL DATA
Power supply voltage
(depending on version)
External fuse (required)
Power consumption
5...$#%...260V AC/DC; 50 ÷ 60 Hz (separated)
or 19...$&...50V DC and 16...$&...35V AC (separated)
T - type, max. 2 A
max. 4.5 VA @ 5 ÷ 260V AC/DC
max. 4.5 VA @ 16V ÷ 35V AC
max. 4.5 W @ 19V ÷ 50V DC
Pulse input fully Isolated, with denouncing filter and pulse width
control
Input frequency range 1.5 to 50 000 Hz
Input levels
low level:
high level:
0V ÷ 1V
10V ÷ 30V (about. 12 mA @ 24V)
Display range 0.00000 ÷ 999999
Frequency measurement accuracy ± 0.02% (full temperature range)
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User manual - RATEMETER STI-73
Indication precision Selected from range: 0 ÷ 0.00000
Rotational speed unit 1/s, 1/min. or 1/h
Time between following pulses settable from 0.1 to 39.9 sec.
Outputs
relay:
or OC-type:
sensor power supply:
0 or 1 NO, 1A/250V AC (cos ϕ = 1)
0 or 1; 30mA / 30VDC / 100mW
24V +5%, -10% / max. 100 mA, stabilized
Communication interface RS 4 5, N1 and N2, Modbus RTU, not separated
Baud rate 1200 bit/s ÷ 115200 bit/s
Display LED, 6 digit, 9mm height, red
Data memory non-volatile memory, EEPROM type
Front panel protection IP 65
optional version with panel cut-out sealing available
Terminals protection IP 20
Housing type
Housing material
Housing dimensions
Mounting hole
Assembly depth
Panel thickness
panel
NORYL - GFN2S E1
72 x 36 x 97 mm
66.5 x 32.5 mm
min. 102 mm
max. 5 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 61010-1
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 61326-1
        '                      
(             (    

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User manual - RATEMETER STI-73
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 inside housings (control panel, switchboard)
insuring appropriate protection against surges and interference. Metal housings
must be connected to ground in a way that complies with the governing
regulations.
- Disconnect the power supply prior to starting assembly.
- Check the connections are wired correctly prior to switching the unit on.
In order to install the unit, a 66.5 x 32.5 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
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 the centre points of multiple
units - due to the thermal and mechanical conditions of operation - are 91 mm x
57mm (Figure 4.3).
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User manual - RATEMETER STI-73
a)
b)
Figur 4.1. Mounting hol dim nsions: a) r comm nd d b) allowabl
Figur 4.2. Installing of brack ts, and dim nsions of conn ctors.
7
66,5 mm
mm
mm
mm
mm
1 mm max. 5 mm
32,5 mm
1 mm
6 mm
max. 5 mm
32,5 mm
92 mm
5 mm
12 mm 10 mm
,5 mm
16 mm

User manual - RATEMETER STI-73
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 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.
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57 mm

User manual - RATEMETER STI-73
!)

(
- 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.

 

–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-4 5 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 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.
9
!

User manual - RATEMETER STI-73
Figur 4.4. M thod of cabl insulation r placing and cabl t rminals
Figur 4.5. T rminals d scription (r lay outputs)
Figur 4.6. T rminals d scription (OC-typ outputs)
'*
10
+ $
+%, " - .
+- +. $%
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01 ''2
''!
/ !&-3
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2$&4 +5%, -10%
Imax = 100mA
5

(depending on version)

678



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+- +. $%
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/ !&-3
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2$&4 +5%, -10%
Imax = 100mA
76+9
Umax = 30V DC
Imax = 30mA
Pmax = 100mW
!2
76+
5
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(depending on version)
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678




!
6-7 mm
max. 2 mm

User manual - RATEMETER STI-73
D p nding on v rsion:
85...230...260V AC/DC or
19...24...50V DC; 16...24...35V AC
Figur 4.7. Conn ction of pow r supply and r lays
6(:
   
            (        
         &";<   $3%4'6     
+%%/<3:
      (              


a) b)
Figur 4.8. Exampl s of suppr ssion circuit conn ction:
a) to r lay t rminals; b) to th inductiv load
11
!
!
1
# & # &
==
1
!
;) >
+ $
=1
=1
# &
;) >
/+

User manual - RATEMETER STI-73
Construction of pulse input allows connecting of inductive or optical sensor with common
earth (Figure 4.9 a) or common plus (Figure 4.9 b), without additional intermediary circuits
(sensor with NPN or PNP type output).
a) b)
Rys. 4.9. An xampl of s nsor conn ction:
a) with common arth, b) with common plus.
Figur 4.10. Exampl of OC-typ outputs conn ction
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.
12
+, +"
)
# &
76+
!2 2!
+
voltage input
24 V
-
Logic controller
+, +"
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# &
76+
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2!
/
$$
=>+%'
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, " - . +%
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

+
-
PNP type sensor
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NPN type sensor
!2
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


+

User manual - RATEMETER STI-73
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:?> 6<8>1)@
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:?>1>/@
Functions 9
• Start to edit the parameter
• Enter to the sub-menu,
• Confirmation of changes made in parameter being edited
Symbol used in the manual:?A@?@
Functions 9
• Change of the present menu,
• Modification of the parameter value,
• Change of the display mode.
13

8>1)
> 6
>1>/
!

8>1)
> 6 >1>/
'=
/
Σ
display
Thr sholds xc ding
LED indicator (R)
inactiv LED ( Σ )
programming pushbuttons
alarm LED indicator (AL)

User manual - RATEMETER STI-73
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 measurement mode the device shows current measurement value (rotational
speed or time per one revolution, it depends on B;5C parameter) with resolution defined by
B5>Cparameter (max 5 digits after decimal point).
Pulses delivered to the input (Figure 4.9) are converted in manner described below:
•If duration of LOW or HIGH state is lower than time defined by parameter B;>(C (see
Tab.7.2 on page 2 ), pulses are interpreted as disturbances and ignored.
•If duration of both states is in the defined range, but their frequency is lower than value of
B;>(C parameter, the device goes to alarm state - relays and current output (if mounted)
are switched to their alarm states (defined by their B'=' C parameters). In this state
message D!E!Dis displayed instead of measurement value.
•In other cases (during frequency and duration of the signal are in permitted ranges) pulses
are delivered to internal frequency divider. The divider (see description of parameter
B5)= >C) should be set to value equal the number of pulses per revolution – in such
case one pulse goes out of the divider every revolution, and it allows to minimize errors
caused by roughness of measurement element (e.g. rack if inductive detector is used).
The frequency after the divider is recalculated according to selected by user measurement
unit (parameter BC), and can be expressed by rev./sec , rev./min or rev./h. Final value
is obtained by multiplication the measurement result by parameter BCand division by
parameter BC. Parameters BCand BCallow to free scaling of the measurement,
and obtain automatic recalculation of rotational speed to linear speed (see example on
page 32). Obtained result is displayed during measurement mode, and is the base of
relays and current output states calculation, and is accessible via RS-4 5 interface with
MODBUS protocol.
–If input frequency is in the permitted range but calculated value can not be fitted
on 6 digits, message B!7!Cis displayed instead of the result.
(modify parameters BCB5>CBCandBCto fit the result on 6 digits).
– While time per one revolution is displayed (parameter B;5C = B5>C9
• If input frequency equals 0, then message B! 5!C is displayed.
• If value of period is to high to be fitted on 6 digits, message B!7=!C
(Overload) is displayed instead of the result.
• If input frequency is different than 0 but value of period is to small to be
fitted on 6 digits, message B!)=!C (Underload) is displayed instead of
the result.
In the measurement mode user can check main thresholds values. After pressing ?A@ or
?@ button, name of the threshold (e.g. C>=5+C) and his value will be displayed on the
display in alternating mode. If ?A@ or ?@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 ?>1>/@ (see: PARAMETERS EDITION).
14
i

User manual - RATEMETER STI-73
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-4 5 interface).
Configuration of the device (via menu or RS 4 5 interface) .
6.2. DETECTION OF THE PEAK VALUES
The !"#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
CE7=C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 C5>'C. Detected
peaks are displayed during the time defined by parameter C>C. 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 6.1). If no peaks are detected while time C>Celapses device starts to
show the current value of input signal again. If „E ”=”E7=” then setting parameter
D>D=%% causes holding peak value until ?> 6@ button is pressed.If „E ”=”>'=” then
value D>D=%% 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).
15
i

User manual - RATEMETER STI-73
Figur 6.1. 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 „/” 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 B >5C, B >5$C
BEF C, B>C, BC, B;;C, BC and B'=' C Depend on B>C parameter,
relays can be not used or controlled over one or two thresholds values.
If one threshold is used (Figure 6.2) the relay can be turned on (B>C= CC) or off
(B>C= C;;C) when the input signal value is contained in zone A. If two thresholds are
used (Figure 6.3) the relay will be turned on when value of input signal is contained in zone A
(B>C= CC) or zone B (B>C= CC) and turned off if the signal is contained in the
second one.
Figur 6.2. On thr shold control of th r lay/LED outputs
16
C>C
measure
time
C>C
C5>'C
C5>'C
real measurement result
display value
zone A
zone B
measure
”SEt P” parameter
”HYSt” parameter
state of
relay/LED
i

User manual - RATEMETER STI-73
Figur 6.3. Two thr shold control of th r lay/LED outputs
The relay outputs and LEDs (named /) can be controlled depend on both - the
current value and the peak value (when peak detection is active) of the input signal.
6.3.1. One threshold mode
Figure 6.4 presents the principle of relay outputs operation for one threshold mode, and
an example values of other parameters.
Description:
'G6 - points where measured signal exceeds border values (expected value ± allowed deviation)
G71,G7;;,71,7;; - relays state changes moments: (for BC > 0, B;;C > 0)
tA , tB , tC , tD - time periods while input signal is in zone A or zone B
Figur 6.4. Principl of LED/r lay output op ration for on thr shold mod
17
B >5Cparameter
(expected signal value)
BEF Cparameter
(allowed signal
deviation)
measured
signal
displayed value
time
time
time
'G
6
relay state
(> =
 = 0
;; = 0)
relay state
(> =
 > 0
;; > 0)
'G6
G71
7;;
relay state
(> =;;
 = 0
;; = 0)
relay state
(> =;;
 > 0
;; > 0)
B;;C
parameter
BC
parameter
G7;;
71
time
time
closed
open
a)
b)
c)
d)
e)
open
closed
open
open
closed
closed
BC
parameter
B;;C
parameter
zone A
zone B
zone B
zone A
zone B
measure
”SEt P” or ”SEt P2” parameter
”HYSt” parameter
state of
relay/LED
i

User manual - RATEMETER STI-73
Parameter B >5C sets a  of the relay, and parameter BEF C sets a
 of the relay (Figure 6.4 a). The relay can change his state  when input value
exceeds (over or under) border value and tA ,tB ,tC ,tD times (Figure 6.4) are bigger than the
time defined by parameters BC, B;;C and BC. Border values means values equal
threshold+hysteresis and threshold-hysteresis respectively.
If BC and B;;Cparametersare set to “0”, then the relay state will be changed
 as input value exceeds any of the border values (see points A and C, Figure 6.4 a,
b, c).
If values of BC or/and B;;C 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
BC (see points BON, DON, Figure 6.4 a, d, e). Similarly, the relay will be turned off if time
B;;C elapse since the input signal value exceeds any of the border values (see points
BOFF, DOFF, Figure 6.4 a, d, e).
If tA ,tB ,tC or tD (when input signal stay in zone A or zone B) are lower than parameters “t on”
or “t oFF”, the relay will not change his state (see points A and C, Figure 6.4 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 B>C The relay can be turned on (B>C = CC), or
turned off (B>C= C;;C) when input signal value is contained in zone A (Figure 6.4 a).
The parameter B'=C 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 ”rELAy1” menu.
18

User manual - RATEMETER STI-73
6.3.2. Two thresholds mode
Description:
'G6> - points where measured signal exceeds border values (expected value ± allowed deviation)
G71,G7;;,671,67;;,>71,>7;; - relays state changes moments: (for BC > 0, B;;C > 0)
',G,6,, >- time periods while input signal is in zone A or zone B
Figur 6.5. Principl of LED/r lay output op ration for two thr sholds mod
Figure 6.5 presents the principle of relay outputs operation for two thresholds mode, and an
example values of other parameters. In this mode parameter B >5$C is accessible in
common with B >5$C, this parameter describes a second threshold of the relay output. The
parameters BEF C, B>C, BC, B;;C, BC and B'=' C are connected with both
B >5C and B >5$Cthresholds. While the controlling process, the relay output changes his
state depends of both B >5C and B >5$Cthresholds in similar way as it was described in
one threshold mode.
If two threshold mode is used, B>C parameter defines state of the relay output when
the input value occurs in a particular zone defined by border values of both . The
relay can be turned on if the input value is contained in zone A (B>C= CC) or zone B
(B>C= CC) and turned off if it is contained in the second one (Figure 6.5).
19
>7;; B >H5C or B >5$C
parameter
BEF Cparameter
measure
d signal
displayed value
time
time
time
'G
6

relay state
(> =
 = 0
;; = 0)
relay state
(> =
 > 0
;; > 0)
'6
G71
relay state
(> =
 = 0
;; = 0)
relay state
(> =
 > 0
;; > 0)
B;;Cparameter
BCparameter
G7;;
>71
time
time
closed
open
a)
b)
c)
d)
e)
open
closed
open
open
closed
closed
BCparameter
B;;Cparameter
zone A
zone B
BEF Cparameter
zone B 67;; 671
>
BCparameter
B;;Cparameter
G>

User manual - RATEMETER STI-73
The sequence of thresholds B >5C and B >5$Ccan beset in any order, due to the
control of relay outputs is done depend on difference between thresholds values
(') and outside of threshold values (G).
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-4 5
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 ?A@ or ?@ button, name of the threshold (e.g.C>=5+C) and his value will be
displayed on the display in alternating mode. If ?A@ or ?@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 ?>1>/@ (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
?A@or ?@ button.
7.1. PROGRAMMING MENU
To enter main menu (being in the measurement mode) operator must to press and hold
at least 2 sec. ?> 6<8>1)@button.
If the user password is defined (see parameter B >B, 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 ”>” in other case.
Pay attention when device parameters are being changed. If it is possible, turn off
controlled installation (machine).
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