Detailed Description
2.12 Block descriptions
PLC Basic Program Solution Line (P3 sl)
2-180 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Value ranges of data types
Data type Representable numerical range
REAL (Digits := 1) - 999999,9 to + 999999,9
REAL (Digits := 2) - 99999,99 to + 99999,99
REAL (Digits := 3) - 9999,999 to + 9999,999
REAL (Digits := 4) - 999,9999 to + 999,9999
Call example
CALL FC 13 (
Row := MB 26,
ChrArray := "strdat".disp, //DB with name strdat in
//data element symbol table
//disp is declared as string[32]
//and assigned in full with characters
Convert := M 90.1,
Addr := P#M 20.0, //Number to be converted
DataType := MB 28, //Data type of the variables
StringAddr := MW 30,
Digits := B#16#3, //3 decimal places
Error := M 90.2);
2.12.20 FC 17: YDelta star/delta changeover
Description of functions
The block for star/delta changeover controls the timing of the defined switching logic such
that the changeover can be performed in either direction even when the spindle is running.
This block may be used only for digital main spindle drives and must be called separately for
each spindle.
The changeover operation is implemented via 2 separate contactors in a sequence involving
4 steps:
Step 1: Delete the "Motor selection in progress" interface signal in the relevant axis DB
(DB 31, ... DBX21.5) and connect the changeover process using "Motor selection" A
(DB 31, ... DBX21.5).
Step 2: As soon as the "Pulses enabled" = 0 (DB 31, ... DBX93.7) checkback signal and the
acknowledgment of the announced motor selection from the drive have appeared, the
currently energized contactor drops out.
Step 3: The other contactor is energized after the time period set by the user in parameter
"TimeVal" has elapsed.
Step 4: After a further delay, the changeover is signaled to the drive with "Motor selection in
progress" (DB31, ... DBX21.5).
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