Manual BG41/BG42/BG43 Software
Rev. 99/49 4-83
4.1.8.12 FB28 (FREIGABE), release of building block
This data handling block resets the new start bit and releases the building block for SPS access. The
block is to be loaded at the end of the OB1.
The new start bit is set by the user in the OB22, if an automatic new start identifier is requested.
This bit is to be given by the individual data handling blocks as the identifier "NEUS".
The data handling block posseses formal operands. The working parameters are to be set through
these formal operands.
The following parameters are to be transmitted when loading FB28 :
Des. Format Explanation
ADRE KH Address set with DIL switches
NEUS BI New start bit
PAFE BY Error messages in relation to parametrizing are filed in this
byte.
Tab. 4-22:List of parameters for the loading of 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 a byte for issuing an error number. PAFE provides the value 0, the
parameter details are therefore 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 entered.
The data handling block examines the parametrized values at the following limits:
ADRE F080...F1FC
NEUS not examined
PAFE not examined
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