Item Description Function
7 «UP» Scrolls up the menu options.
Increases a parameter value.
8 «escape» Returns to the next higher menu option level.
Exits the edit mode without saving.
Returns to the main menu when held down at least 10 seconds.
9 «enter» Only affects the value in the third line of the display.
Enters the selected menu option.
Exits the edit mode and saves.
10 «Events and
information»
Displays the event memory.
Selection is possible from every menu.
Return with «esc» key.
11 «Reset» Signifies recognition of alarms and warning messages.
Resets the event memory (when permitted).
Tab. 38 Keys
Fig. 10 Indicators
Item Description Function
12 Display field Alphanumeric display with 4 lines.
13
Alarm
Flashes red when an alarm occurs.
Lights continuously when acknowledged.
14
Communication
Lights red if communication via the Profibus interface is interrupted.
15
Warning
Flashes yellow for:
■ maintenance work due,
■ warning messages
Lights continuously when acknowledged.
16
Controller power
Lights green when the power supply to the controller is switched on.
17
LOAD
Lights green when the compressor is running under LOAD.
4 Design and Function
4.7 SIGMA CONTROL Keys and Indicators
32
Service Manual Screw Compressor
BSD 9_5708 08 USE