MERRICK MC3 35.00.EX, Руководство по эксплуатации и обслуживанию, Страница: 10 / 69

35.00.EX O&M Manual 6
Heel Weight
The hopper weight at which a re-fill normally takes place. There are
several exceptions to this rule, for example, no re-fill takes place
during Fine Feed. The Heel Weight may have to be set surprisingly
high, especially if the material is floodable.
Fill Time
Max time allowed for a re-fill.
Batch Parameters
The Batch Parameters deal with the batching of the material in the hopper They are all
set in the Bach Parameters menu. See page 24.
Fast Feed Spd
The speed, in %, of the feeding device during Fast Feed.
Fine Feed Spd
The speed, in %, of the feeding device during Fine Feed.
Fine Feed Wt
As the Batch Total approaches the Setpoint, the controller switches
from Fast Feed to Fine Feed. The switch point is when the batch total
equals the setpoint minus the Fine Feed Wt. A value of Zero will
eliminate the fine feeding.
Fine Feed Tm
The Fine Feed Wt will be adjusted, after every batch, so that the fine
feed time equals this parameter. A value of Zero will leave the Fine
Feed Wt unchanged.
Fine Feed Adj
Determines aggressiveness of the Fine Feed adjustment, when timed
Fine Feed is used.
Curr Preact
As the Batch Total approaches the Setpoint, the controller will turn off
the feeder before the batch total is reached. The switch point is when
the batch total equals the setpoint plus the Preact. Hence the Preact
is typically a negative value. The parameter is normally adjusted by
the controller after every batch.
Preact Limit
Absolute limit of the Preact, positive or negative.
Pre Max Chang
How much the Preact is allowed to change from batch to batch. A
value of Zero will disable the automatic updating of the Preact.
Preact Apply
The fraction, in %, of the last batch error (Setpoint minus Batch Total)
that is used to adjust the Preact.
STATE LOGIC
Batching is a cyclic operation. The hopper must also be filled periodically. The typical
operation will follow a sequence like Fill, Batch, Batch, …, Fill, …, Batch, …, Cleanout.
The sequences are affected by external commands, the weight in the hopper and Faults.
Feeder States
The controller uses states for digital control. Internally, the State is a numerical value in
R[261]. In networked applications, it is a good idea to monitor the State value, and use it
for HMI indication purposes.
On the next page, all visible states are listed. In the Main and Batch Statistics screen,
you can see Text 1 and Text 2. In the Action Screen, you can see the Action Screen
Text.