Functional description and allocation of terminal pins Manual BG41/BG42/BG43
3-60 Rev. 99/49
3.2.9.5.9 FB58 (IN_DW), reading of analogue values in the data word
With this data handling block FB58 (IN_DW) one or all analogue inputs can be read. The data
block is to be opened before loading the FB.
The following parameters are to be transferred when loading the FB58:
Des. Format Explanation
ADR KF Peripheral base address of the building
block
K/EI KY Number of channels / Analogue input
WERT W Output value
FEHL BY Error byte
Tab. 3-16: List of parameters for the loading of FB58
The following details are necessary for the abovementioned parameters:
ADR
(peripher)
Input of the peripheral address, under which the building block can be controlled
by the PLC. This address can be set with the DIL switches S1 and S2. Further
details can be found in chapter 5.
K/EI
K: Number of channels to which the module is connected (1-3).
EI: Number of analogue inputs (1-9)
At 9 all of the module’s analogue inputs are read.
WERT
Data word, in which the analogue value is to be filed.
If it is entered at EI 9, all input values from the data word given in WERT are
filed in the opened DB.
FEHL
This byte has a value of 0, if functioning correctly. In the case of a malfunction an
error code is entered. The error is acknowledged automatically, i.e. the byte is
reset to 0 once the cause of the error has been eliminated.
1 Building block not ready
2 Building block does not answer
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