The control system of multi-component batching

The control system of multi-component batching

The control system of multi-component batching (further SMB) serves for joint operation with the circuit of control of the process equipment, realizing consecutive batching of set portions of raw materials in the weight hopper. SMB carries out transformation of output voltage of the load cells of the LRD of the hopper to the digital form, its logical and mathematical handling and generation of the corresponding signal to the external control circuit for ensuring of portion weight batching of seven components of raw materials.

PW-310 ensures setting by the operator of dose values of raw material components.

In the course of batching there is an evaluation of current weight of the next component and an output of its value on the digital indicator PW-310.

At the same time the comparison of the current value of weight with the set value is carried out. By the results of this comparison the output signal, used by the external circuit for stopping of feeding of the batching component is generated. The signal is generated with an advance, the magnitude of which can be set by the operator for each component.

In SMB the account of actually batched amounts of each of components and their sum, and also the amount of batching cycles is organized. Each of the accounted values is saved in totals of two components:

- the sum (long-time) total, which can be set by the operator in a zero only after password entering;

- the subtotal (operative), which can be set by the operator in a zero without password entering, for example, each shift or day;

Any total can be output on the display on demand of the operator.

Characteristic

Value

Power supply

from alteating-current mains with voltage (220 ± 2233) V, frequency (50±1) Hz

Overall dimensions, mm, no more:

- a weight device

- a weight processor PW-310

- an exteal metal body

- a box with semistors

 

  

255 х 182 х 90

355 х 265 х 110

182 х 182 х 90

Temperature range, °С

from – 10 to + 50

Relative humidity at 35°С, %

to 95

Range of an input analogue signal of direct current voltage, mV

0…10

Output discrete signal

open symmetric thyristor

Power supply of transmitters

dc voltage 5 V

Amount of connected load cells (Rin=350 Ohm)

to 8

Length of the transmitter cable

50 m maximum

Inteal resolution, discharges

24

Industrial resolution, references

40000

Commercial resolution, references

10000

Discrecity of indication

1; 2; 5 x 1; 0,1; 0,01; 0,001

Vibrations in a frequency range, Hz

from 10 to 55

Amplitude of vibrations, mm

to 0,35

Operation mode

continuous

Service life, years, not less

10

Name

Amount, piece

Note

 The weight device *

1

The device of the Customer

The weight processor PW-310 with the exteal metal body

1

 

The box with semistors

1

 

Thebutton switch S1

1

 

The button S2 "Start"

1

 

The switcher S3 "Man/Aut"

1

 

The magnetic starter KM

4

The device of the Customer

 

* On the Customer’s request the delivery of the weight device (or the load cells for the hopper existing at the Customer) is possible.

Ukraine

PLC ʺZaporozhye ferroalloy factoryʺ

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