Nordberg A2020 User Manual

Version 3/01 Page 7/25
2.2.1 Manual control mode
On manual mode crusher can be started and stopped in sequence by using start/stop
push-buttons via Nordberg A2020. Nordberg A2020 goes to manual control mode
when manual control mode is selected by operator or automatically if Nordberg
A2020 system manager does see a loss of DCU <--> PCM/LCM communication for
longer than 2 minutes. Manual control mode may also be forced by system as a result
of serious fault on control modes.
Manual control mode does not require DCU operation and is therefore an operation
mode to secure continuous operations of the crusher even on a DCU breakdown
situation.
NOTE! In case of DCU breakdown or loss of communication no performance
recording is made during the time of breakdown or loss of communication.
All safety limits and interlockings etc. are always operative according to the parameter
setup on manual control mode.
Selecting manual control
•
Enter crusher control display (press F1 in main menu).
•
Select OP. MODE (press F1).
•
Choose the manual control alternative by moving the highlighted line (F5 up, F6
down). F2 gives you more information.
•
Accept your choice (press F1).
The selected operation mode is shown in the operating mode window. Press F7 to exit.
2.2.2 Setting control mode
On setting control mode, the crusher controller compares the actual value of setting with
the preset value given. If the preset and actual value difference is bigger than hysteresis
(hysteresis value is set in the configuration), setting is changed until difference is less
than hysteresis value.
If the limit value of maximum pressure or maximum power is exceeded, the controller
increases the setting until the pressure and power values are below maximum limits.
Setting is returned to preset value when pressure and power values are below maximum
value – hysteresis value over 3 seconds.
Selecting setting control mode
•
Enter crusher control display (press F1 in main menu).
•
Select OP. MODE (press F1). Choose the Setting control mode alternative by moving
the highlighted line (F5 up, F6 down).
•
Accept your choice (press F1)
The selected operating mode is shown in the operating mode window. Press F7 to exit.

Nordberg A2020 Specifications

General

Brand	Nordberg
Model	A2020
Category	Controller
Language	English