6. Function blocks
6.1 Manufacturer function blocks
are then moved by one field in the direction of the next higher field numbers. A rising
edge at the BP (BackwardPulse) transfers the double word value at data input I2 to
the last register field D8. The original contents of the register fields are then moved
by one field in the direction of the next lower field numbers.
Example: Shift register DW mode, backward
Fig. 219: Shift register SR..: Backwards operation in DW operating mode
Initial situation
The "Function block release by EN is necessary" option is enabled.
– SR..EN is not activated, the function block is not active.
– SR..D2 contains the value 8, a 0 is contained in the other register fields.
Transfer of value
– SR..EN is activated, the function block is active.
– SR..I2 has the value 10.
– With the backwards pulse from SR..BP the register field SR..D8 shifts the content of all
register fields one place back and accepts the 10 from SR..I2.
Transfer of value
– SR..EN is activated, the function block is active.
– SR..I2 has the value 52.
– With the backwards pulse from SR..BP the register field SR..D8 shifts the content of all
register fields one place back and accepts the 52 from SR..I2.
Reset of the register
– SR..EN is activated, the function block is active.
– Activating SR..RE clears the content of the register.
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