Operating instructions

OI: BK MIKRO LIN.B Mode of Operation
Rev. 2.02 dated 31.05.2007 Page 17 of 30
3 Mode of Operation
BK MIKRO LIN.B can be operated in different ways:
• Monitoring with learn function (Teach mode),
especially for "Multi": 8 different scanning positions can be binary coded.
• Monitoring with setting scanning range (Switch mode),
possible only for "Multi".
• Monitoring as object monitoring or free space monitoring,
possible only for "Multi".
Return travel monitoring is always active.
3.1 Scanning process
Applying a pulse to "Start" or "Teach" terminal will trigger a scanning cycle. During scanning
operation, both relay outputs will be inactive (LED for "O.K." and "K.O." not illuminated).
For the real scanning process, i.e. after a "Start" pulse, initially, the scanner will travel at
maximum possible speed in forward direction to the start of a given monitoring range. However,
its motor will slow down to a preselected scanning speed in time before a learned position using
teach mode or a preselected angle set by rotary switch using switch mode is reached.
The monitoring range will then be traversed at the preset scanning speed and its related force
which is to be used to scan an object or range.
During the entire operation, all pulses generated by the scanner's internal encoder will be
continuously processed.
If the system detects that the scanner no longer moves or has exceeded the end of the
monitoring range, the direction of motion immediately changes, and the scanner will return
at maximum speed into its stop position.
Depending on the result of scanning the "O.K." or the "K.O." relay will be activated,
and the LED belonging to will indicate the result at the control unit.
3.2 Reference procedure when system is switched on
After supply voltage has been applied, the BK MIKRO LIN.B will carry out a self-test.
After that the system will run a reference procedure:
• Travel to internal backstop
• Move into stop position