User manual
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[d ] to the max. value.
Please refer to Fig 8-2 for the control sequence order of batching scale in external mode.
Fig 8-2 Control Sequence Diagram of batching scale in External Control Mode
Brief description of control procedure of the batching scale in external control mode (Please refer
to sequence order Fig 8-2):
(1) The instrument is operating and waiting for triggering signal;
(2) The triggering signal arrives; t0 is delayed and waits for the cargo to be stable;
(3) Time t0 is over and the instrument starts to calculate the average weight of the cargos with
time interval of t1, which will serve as reference for batching signal;
(4) Time t1 is over. Send the signal to PLC immediately and PLC will remove the cargos
according to the signal.
(5) Signal sending is finished and the instrument will judge whether the weight is back to zero
zone again. Only when the zero zone is entered, would the next circulation be started.
(6) Table 6-2 describes the functioning process of batching scale in external control mode in forms
of program step.