Handling with VIPA data handling blocks Manual BG41/BG42/BG43
4-40 Rev. 99/49
4.1.7.7 FB28 (FREIGABE), Building block release
This data handling block resets the new start bit and releases the building block for SPS access. The
building block is to be loaded at the end of the OB1. The new start bit is set in the OB22 by the user,
if an automatic new start identifier is wanted. This bit is to be given by the individual data handling
blocks with the identifier “NEUS.“
The data handling block possesses formal operands. The working parameters are to be set by these
formal operands.
The following parameters are to be transferred when loading FB28:
Des. Format Explanation
ADRE KH The address set with DIL switches
NEUS BI New start bit
PAFE BY Error messages or parametrizing are filed in this byte.
Tab. 4-14:List of parameters for loading FB28
The following details are necessary for the abovementioned parameters:
ADRE
Input of the physical start address, under which the building block can be
accessed by the PLC. This start address can be set with the DIL switches S1 and
S2 (see chapter 5).
NEUS
Release of building block when NEUS is set at 1.
PAFE
Contains one byte for the issuing of an error number. If PAFE has the value 0 the
parameter details are correct. A value unequal to 0 represents an error.
PAFE Error codes
0 No error
11 Invalid address ADRE.
An address smaller than F080h was given.
The data handling block examines the parametrized values at the following limits:
ADRE F080...F1FC
NEUS no examination
PAFE no examination
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