eta 13180LP-T, Operation

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[Pellet store with switch unit] function block ETAtouch controller
5.13 [Pellet store with switch unit]
function block
Overview of pellet store with switching unit
Up to 4 suction heads can be controlled by one
switching unit.
1 Operating condition and information.
A description of the operating conditions can be
found in the integrated Help menu by pressing the
button.
2 Current pellet stock.
This is calculated by the control system and can
therefore differ by +/- 15% from the actual pellet
supply
3 Manually switch to next enabled suction probe
4 Enter new stock levels after filling
5 Suction probe enabled: pellets can be conveyed
from this suction probe.
6 Suction probe restricted: this suction probe is not
activated by the switching unit
[Stock level] button
After filling the pellet store, a new supply of
pellets is fed in with this button.
Example: 1200 kg of pellets are available, and
3000 kg is refilled. The new stock will be registered as
4200 kg.
Manually changing suction probes
This button manually switches to the next
enabled suction probe, in order to move the
pellets.
Disabling and enabling a suction probe
This symbol represents an enabled suction
probe. This can be controlled by the switching
unit for conveying the pellets. If an enabled
suction probe is selected, then this is locked (
symbol). It will then no longer be activated by the
switching unit. By re-selecting the locked suction
probe, it is enabled again (
symbol).
Function of the switching unit
The conveying and clear modes are represented by a
green line between an enabled suction head and the
switch unit. If a suction head is no longer able to
convey pellets, the control system automatically
switches to clear mode. Here the conveyance hose
now introduces return air in order to dislodge any
blockages in the conveyance hose or suction probe.
If an enabled suction probe is selected ( symbol),
this is then locked ( symbol). It will then no longer be
activated by the switching unit. Re-selection of the
locked suction probe frees it again (
symbol).
The switch unit regularly switches between the
individual, enabled suction heads, to ensure that the
pellet store is emptied uniformly. You can adjust the
maximum number of fill-up operations by a suction
head, see chapter
5.13.1 "Text menu - Adjustable pa-
rameters" .
With the button, you can also manually change
to another enabled suction probe.
Entering a minimum level for the pellet stock
You can define a minimum level for the pellet stock so
that a warning is issued when the stock goes below
that level.
The minimum level is set with the [Warning limit for
pellet stock] parameter in the text menu of the pellet
stock.
5.13.1 Text menu - Adjustable parameters
Adjustable parameters
Detailed descriptions of the parameters are provided
below.
Explanation of [Switching at]
This parameter sets the maximum number of suction
operations of an enabled suction head. When a
suction head has reached this number, the switch unit
automatically changes to the next enabled suction
head.
Conveying system
Switching at