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Through ‘Config’ parameter is selected one of the two possible schemes of action:

 

MODE А – Dispenser/ Batcher

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,

 

K

1

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) 

 

Document revision  2015-08-17

7

dose1

dose2

dose3

output K3

K2

K1

tOff

OFF
OFF

OFF

Start

weight

time

MODE  А

Содержание MS8357

Страница 1: ...COMPETENCE IN MEASUREMENT WEIGHT BATCHING CONTROLLER with Analog Output and MODBUS RTU communication MS8357 V 2 1 TECHNICAL DESCRIPTION AND USER MANUAL PLOVDIV 2015 Document revision 2015 08 17...

Страница 2: ...elay 3 A 250 VAC NO SPST 3 NPN OC iso 70 mA 70V Power supply 0 1 80 250 VAC 50 60 Hz 24 V DC Sensor supply sensitivity 1 5 VDC 1 7 mV V 2 Other Communication 0 No 1 RS485 MODBUS RTU Speed Conversion 1...

Страница 3: ...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 o...

Страница 4: ...ime to Tare and Zero tmin 20 ms Digital outputs 3 K1 K2 K3 250 VAC 3 A SPST NO NPN OC iso 70 mA 70V transistor open collector unsulated from measurement part required an external power supply Unsulati...

Страница 5: ...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 Shield...

Страница 6: ...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 in...

Страница 7: ...switching Start 1 2 3 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...

Страница 8: ...t 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 but...

Страница 9: ...ital input The device can be tared by Tar 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...

Страница 10: ...p 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 numb...

Страница 11: ...w 0 255 rS 485 Communication parameters For setup see below 0 255 Adr rS Modbus address 0 255 Flt Ar Average filter of the measured weight 1 1 5 Flt P Exponential filter of the measured weight 1 1 5 F...

Страница 12: ...128 Setting the configuration word Each bit in the configuration word has weight value and in the configuration word have to be entered sum of the weight values Example for setting of ConFiG paramete...

Страница 13: ...NICATION option The device is MODBUS RTU SLAVE with possibility for communication of 9600 bps by RS485 2WIRE line In standard performance without using a repeaters to one line can be connected up to 3...

Страница 14: ...net Doze3W4 16 Long Unsignet DPoint 102 LSByte Unsignet Doze2 18 Long Unsignet FLT J 103 Integer Unsignet Doze2W2 20 Long Unsignet FLT AR 104 MSByte Unsignet Doze2W3 22 Long Unsignet FLT EP 104 LSByte...

Страница 15: ...ted by the positions of both inputs for selecting of set point S1 and S2 The parameter A1 of the device screen is displayed x1024 ie read over the network 1 and the menu of the device would be 1024 Ca...

Страница 16: ...sport poor storage incorrect usage forces of nature failure to follow instructions and when others made an attempt to remove the defects In these cases the defect can only be removed for a fee Service...

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