Functional description and allocation of terminal pins Manual BG41/BG42/BG43
3-38 Rev. 99/49
3.2.8.9 FB10 (LESEN), reading of the counter reading
With FB10 (LESEN) the value of a particular counter can be read.
The following parameters are to be transferred when loading FB10:
Des. Format Explanation
ADR KH Building block’s abssolut base
address
KNR KF Number of channels
ZNR KF Counter number
WERT W read value (16 Bit)
NEUS M New start bit
Tab. 3-5: List of parameters for the loading of FB10
Due to time reasons this function block does not examine the reliability of the
formal operands KNR and the validity of the counter number. If the read
numerical value is filed in a data word, the corresponding data block must be
opened before loading FB 10 with A DBxx.
The following details are necessary for the abovementioned parameters:
ADR
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).
KNR
Number of channels, to which the counter module is connected. For the building
blocks the following inputs are possible:
BG41 - 1
BG42 - 1 or 2
BG43 -1,2or3
ZNR
Number of counters on the module, which are to be read. Each counter module
has three counters.
The inputs1, 2 or 3 are therefore permitted.
WERT
Giving the number of the data or flag words, in which the value read from the
counter is to be entered.
NEUS
As long as the bit is at the signal stand is at 1, the processing of the function
block is discontinued.
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