microSYST MS8357 Parts list manual

COMPETENCE IN
MEASUREMENT
WEIGHT BATCHING CONTROLLER
with Analog Output
and MODBUS RTU ommuni ation
MS8357
V 2.1
TECHNICAL DESCRIPTION
AND
USER MANUAL
PLOVDIV 2015
Document revision 2015-08-17

NCONTENT Стр
I. ORDER ODE 2
II. FEATURES 3
III. ADVANTAGES 3
IV. DESIGNATION 3
V. TE HNI AL DATA 4
VI. FRONT AND BA K PANEL. TERMINAL AND ONNE TION 5
VII. OPERATING MODES 6
VIII. OPERATING GUIDE 8
IX. SYSTEM PARAMETERS OF THE REGULATOR 11
X. A TIONS AGAINST INTERFEREN E 13
XI. OMMUNI ATION - MODBUS RTU 13
I. ORDER CODE
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MS8357 - x.x.x.x.x.x.x.x
Example MS8357 - 1.1.0.3.2.1.1.1
Digital outputs - К1, К2, К3
0 - No
1 - Relay 3 A / 250 VAC - - NO SPST
3 - NPN OC iso 70 mA 70V
Powe supply
0 -
1 -
80 250 VAC ; 50 / 60 Hz
24 V DC

Senso supply / sensitivity
1 - 5 VDC 1 … 7 mV / V
2 - Other
Communication
0 - No
1 - RS485 MODBUS RTU
Speed Conve sion
1 - 12,5 mS / 80.0 SPS
2 - 60.0 mS / 16.7 SPS
Display ( 6 digit fo mat)
0 - LED 10mm
1 - LED 14 mm
Display colo
1 - Red
2 - Green
Analog output
0 - No
1 -
2 -
3 -
4 - Other
0 20 mA
4 20 mA
0 10 V



Senso supply / Sensitivity
Speed Conve sion
Powe supply
Digital outputs - К1, К2, К3
Analog output
Communication
Display ( 6 digit fo mat)
Display colo
...................5 VDC 1 … 7 mV / V
.......................................12.5 mS / 80 SPS
..................................
..............
............................................................
...................................RS485 MODBUS RTU
LED 14 mm
.....................................................................Red
80 250 VAC ; 50 / 60 Hz
NPN OC iso 500 mA 70V
4 20 mA
........................................



II. VERSION FEATURES
●MS 8357 is implemented in two hardware variants depending on requirement of conversion speed.
The software supports both. It is necessary in Menu / Parameter / Bit – SYST/rS485/bit6” with
which hardware works the software to be specified. Depending on that the maximum conversion
speed is 12.5 mS /80 SPS – number of measurements per second/ or 60 mS / 16.7 SPS/. In both
variants for greater noise immunity can be operated with 100 mS / 10 SPS /.
●MS 8357 operates as a controller / it controls it's outputs, only if the tare weight is less than that of
Calibration / C LL /.
●MS 8357 forms three independent galvanically isolated power supply voltages:
- Power supply of the Measurement circuit
- Power supply of Analogue output and digital inputs.
- Power supply of RS485
●The output analogue signal has insensitivity of the zero about 5 mV, i.e. in zero input indication the
output is about 5 mV ( 0.05% in 0 ÷ 10 V ) . Above that level the output operates linearly with
accuracy 0.003% from range.
III. ADVANTAGES
●High measurement accuracy - 0.003%.
●User selectable measurement speed - up to 80 SPS.
●Galvanic insulation of the measurement part from analogue output, digital inputs and outputs and
from RS485.
●Fast selection of up to 4 sets of parameters by combination of two digital inputs
●Automatic counter of ready doses.
●Analogue output that transmits the input process variable up to 0.003% linearity.
●MODBUS RTU communication by galvanically insulated RS485.
IV. DESIGNATION
MS8357 is suitable for including in dosing or batching systems by weight method. The input
signal is formed by bridge weight sensor which is supplied by the device. The sensitivity and the
power supply of the sensor are hardware fixed and have to be specified in the order code.
The analog output which is galvanically insulated from the input signal transmits the measured
process variable. Most commonly used is uniform signal 0 ÷ 20 mA D ; 4 ÷ 20 mA D ;
0÷ 10 V D which has to be specified in the order code.
The device has four galvanically insulated from the measurement part digital inputs TARE,
ZERO, S1 and S2 which are designed respectively to tare and reset the measurement, and for
selection of specified in advance set-points.
The controller has three digital outputs, which are user configurable.
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V. TECHNICAL DATA
Analog input from bridge weight sensor
- power supply / sensitivity of the
sensor
5 V D / 1 ÷ 7 mV/ V
...................................(other)
- measurement accuracy 0.003%
- temperature stability 5 ppm/ °
- conversion time without software
filter:
- fast / slow conversion
According to the configuration of order code
and from SYST/rS485/bit6 menu:
- 12.5 / 100 mS или 60 / 100 mS
- software filters:
arithmetic mean - of 1
level exponential – of 2 level
•Arithmetic mean - 1 ÷ 16 measurements ( х10 ms)
•exponential - attenuation % - 0, 50, 75, 88, 94 %
Analogue output, DC 1
- transmitting the measurement 0 ÷ 20 mA 4÷ 20 mA 0 ÷ 10 V .......................other
- conversion accuracy 0.003%
- temperature stability 5 ppm/ °
- output forming time 60ms
- measurement part insulation 1500 V D for 1 s
Digital inputs 4
Tarе, Zero/Start,
S1, S2-selection set of parameters-2
Low active level NPN to GND iso
minimum time to Tare and Zero tmin= 20 ms
Digital outputs 3
K1, K2, K3
•Реле 250 VA / 3 A - SPST - NO
•NPN O iso 70 mA 70V transistor open collector,
unsulated from measurement part, required an external
power supply. Unsulation - Viso = 3750 V
- output forming time 20 ms
Communi ation MODBUS RTU RS485;
9600 bps; parity non/even; 1 / 2 stop
Power supply
Power supply 80 ÷ 250 VA ; 50 ÷ 60 Hz
24 V D
Display and Keypad
- display range 6 seven segment LED's 14 /или10/ mm - 99999÷99999
- display format XXXXX, X.XXXX, XX.XXX, XXX.XX XXXX.X
program selectable, by decimal point
- display color red, green, transparent
- LEDs 4
- keypad Semi sensor keypad
Ambient onditions
Operating temperature / humidity 0 ÷ 50 ° / 0 ÷ 80 % rh
Storage temperature / humidity -10 ÷ 70 ° - 0 ÷ 95 % rh
Protection class IP 65
Dimensions
Overall dimensions (WxHxL) 121 х 171 х 58 mm
Mounting On wall
Weight Max 540 g
Software version: v1.1
For discrete outputs open collector logic 0 depends on the load on the output:
V e ( sat ) ≤ 1.00 V at Ic = 70 mA. V e ( sat ) ≤ 0.75 V at Ic ≤ 10 mA
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VI. FRONT AND BACK PANEL. TERMINAL AND ELECTRICAL CONNECTION
6.1. Conne ting the Power Supply – by ORDER CODE
Incorrect power supply causes serious damage !!!
6.2. Conne ting of the Sensors
●The unit allows connection of up to 4 weight sensors.
●In 4-wire connection, the respective positive and negative terminals of the "Exc" and
"Ref" is given short at side of the unit.
●All sensors must be connected before the device is set / tare and calibration /
●Shielding braid of sensors are connected to the unit only if it is not connected at the
other end. Terminal "Shield" is connected to the grounding terminal in the panel-"PE”
Six wire onne tions Four wire onne tions
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6.2. Conne ting of the Analog Output
●nalog output is one such type is configured in the Order Code
6.3. Conne ting of the Digital Input
6.4. Conne ting of the Digital Outputs
Discrete outputs are identical and are of two
types - relays or isolated open collector.
Relay outputs have a common contacts and
transistor outputs are with common emitters.
6.5. Conne ting of the RS485
Signals A and B are connected to the corresponding line of RS485.
If the device is the last in the line include a termination resistor by Jumper- R term., next to the
terminals of the RS485
VII. OPERATING MODES
The controller is used as a part of controlling of processes for dosing of materials. Based on
measured input weight three digital and one analog output are formed. Supports 4 sets of operating
set points:
•Dose 1 / weight of changing of K1 “dose 1”
•Dose 2 / weight of changing of K2 “dose 2”
•Dose 3 / weight of changing of K3 “dose 3”
Selection of one of the four sets when setting the set-points or in operating mode is set by
combination of the inputs S1, S2. The controller indicates which set of parameters is chosen for
current in the heading of “Prog” menu - Prog 1, 2 etc.
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Through ‘Config’ parameter is sele ted one of the two possible s hemes of a tion:
MODE А – Dispenser/ Bat her
●Declines in the graph are eventual interference or vibrations. If the measured value has
reached a certain set-point the respective output become active and it is active whether
the measured value falls below the set-point. The output is active till the pressing the Stop
button, timeout tOff ≠ 0 or reaching the last dose.
After power supply voltage the device is waiting for start of Zero/Start input. An active
level of this input starts the process. K1 output becomes active. When reaching dose 1, K1
becomes inactive and K2 becomes active. When reaching dose1+dose2, K2 becomes
inactive and K3 becomes active. When reaching dose1+dose2+dose3, K3 becomes
inactive. Next start – in transition from inactive to active level of Zero/Start input.
Sequence of switching Start→К1→К2→К3→Stop can not be changed.
The controller gaps one or more stages if the weight at start exceeds their set-points.
The whole process is limited in time by tOff parameter.
Start can be configured (parameter ConFiG) with or without taring.
It is permissible integration of inputs Tare and Zero/Start with which is obtained taring at
startup.
Start by active level of input Zero/Start when switching on the power supply voltage have to
be weighed against the option “tare at startup”. If the option is active or if inputs Zero/Start
and Tare are integrated can be used a pulse not constant input signal to avoid re-tare in power
supply failure and restoration.
On the front panel there is a Start/Stop button which is with analogous function or stops the
process if it is already started.
Inversion of the outputs is possible (parameter ConFiG).
Parameters dose1, 2 and 3 are dosing set-points (for example when mixing various
ingredients)
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dose1
dose2
dose3
output K3
K2
K1
tOff
OFF
OFF
OFF
Start
weight
time
MODE А

MODE B – Comparator / Stage ontroller /:
●Declines in the graph are eventual interference or vibrations. Above certain set-point the
respective output become active and it become inactive if the measured value is below the
set-point. At reverse there is no hysteresis.
Parameters dose1, 2 and 3 are switching levels.
After power supply voltage a normal operating mode is activated. Three digital outputs are
formed.
Output K1 become active exceeding the weight “dose 1” and it become inactive at weight
less than “dose 1”. Its logic of action can be inverted by bit 0 of the “ConFiG” parameter.
Output K2 become active exceeding the weight “dose 2” and it become inactive at weight
less than “dose 2”. Its logic of action can be inverted by bit 1 of the “ConFiG” parameter.
Output K3 become active exceeding the weight “dose 3” and it become inactive at weight less than
“dose 3”. Its logic of action can be inverted by bit 2 of the “ConFiG” parameter.
Input Zero/Start has function “reset” of the tare (indications as after calibration)
In this mode the Start/Stop button of the front panel is not used.
VIII. OPERATING GUIDE
8.1. LEDS
The regulator has five LEDs - К1, К2, K3, PR and RS. К1, К2 and K3 light when the
respective outputs К1, К2 and К3 are active. LED PR glows in programming mode. RS LED
glows green or red when receiving or transmission data by RS485.
Before starting a process of dosing using inputs for selecting of dosing parameters can be
selected the desired set of parameters. Thus the operator can quickly and easily selected via
external switch new dose without the need to enter the setup menus.
The controller supports up to 4 sets of parameters for predefined set-points.
In “PARAMETERS SETTING” mode are set parameters from the set which is selected by
combination of inputs for selecting set of parameters.
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dose1
dose2
dose3
K3
K2
K1
MODE B
{
ON
ON
ON
ON ON
ON
ON

8.9. SCREEN MENUS AND BUTTONS FUNCTION
Button Fun tion
Up
By pressing the button to change the on-screen menus in the following sequence :
- Zero – Display the tare value
- Count – Number of doses
- all – alibration mode – it can be hidden
- Prog – Parameters setting
- Measure – urrent measured value
5 sec. after using the button, goes back to the main menu.
Left Go back to the main menu – Measure
Enter/Prog
According to currently selected menu this button has following functions:
Cuurent Menu Fun tion
Zero Zero learing the current tare
ount Clear Count learing the counter
all Calibration Enter in calibration mode
Prog Programming Enter in parameters setting mode
Enter/Prog
+ Left
Tare in mode – Measure. The buttons pushed and hold up to stop the flashing the
message „Tare“.
Function Tarе , Zero and Call can be hidden by “CONFiG” parameter from SYSTEM
PARAMETERS menu
Start/Stop Start/Stop in mode А
8.3. TARE – / with buttons „Enter/Prog + Left” or with digital input /
The device can be tared by ‘Tarе’ input at any time except calibration procedure, during
setting the parameters and during filling for mode A. This also applies to the input
‘Zero/Start’ - clearing of the tare / filling start.
In mode B, for tare there is additional condition to go through 'Zero’ first (indications as
after calibration). This condition can be canceled by parameter in CONFiG. When taring the
weight measurement starts 1 s after activation of the input and continues 1s. If this weight is
bigger than tArЕHi (% от HiL-t) the operation becomes invalid and flashing inscription
“tArЕEr” appears on the display.
If the button Enter / Prog is pressed at power on (activation of system parameters), tare is
performed unconditionally. If the measured weight> tArEHi message appears "tArEEr" to
power off.
8.4. RESET - Zero for mode В
This function is activated by the digital input or by keypad if this is enabled by the
configuration word “CONFiG”
When activating the respective input the tare value is reset. This function is not active during
calibration, during setting of parameters and during filling for mode A.
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8.5. CALIBRATION - Call
Before alibration the devi e has to be tared.
Reference weight has to be placed.
Allow to establish the value of the display.
Enters “ ALIBRATION” mode with button “Enter/Prog” .
Use the arrows to correct the displayed value under placed reference weight.
Press the “Enter/Prog” button to confirm and output from calibration.
Exit from “CALIBRATION” menu is performed automatically also 10 sec. after pressing a
button and the changed value is stored.
8.6. DOSES COUNTER – Count
The controller makes automatic reading of number of switching of К3 and stores them in
nonvolatile memory. The counter is incremented by 1 when the measured weight exceeds the
parameter doSE 3. After reaching1000000 the counter is reset and continues its work. In the main
menu there is an option to reset the counter (see “Operating guide” point 1)
8.7 SETTING THE DOSING PARAMETERS - Prog
Setting of parameters – mode “Prog”. hanging the parameters is done through “Left” and
“Up” buttons. The current digit for change is shown by flashing dot, using “UP” button the
value is changed and using “Left” button the position of the flashing dot is changed. If the
change of sigh of the number is enabled it is changed when the flashing dot is on leftmost
digit.
doSE1 Dose1 / weight of changing of K1. Dimension and decimal point according to
maximum measured weight and resolution of the sensor.
In mode A it represents a dose, and in mode B – level.
All features are in effect for the next two set-points.
doSE 2 Weight of changing of K2
doSE 3 Weight of changing of K3
After setting of “doSE 3”, “End“ appears on the display. When pressing a button other than
“Enter/Prog” proceed to re-setup of set-points. By pressing the “Enter/Prog” exit from
setting mode.
8.8. ERROR MESSAGE
Error Fun tion
“ErrorA” Measurement error. It is necessary the connection of measuring sensor with the
device to be checked. Parameter ErLuvL determines the limit for activation of
this message.
“ErrorU” The tare weight together with some of operating set-points exceed the maximum
measured weight by the device.
“tArEEr” Tare weight > tArЕHi (% from HiL-t).
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