Structureofachannel; Structureofa Channel - Siemens SIMATIC S5 Equipment Manual

General Function Description
1.4 Structure of a Channel
Peripheral bus SIMATIC S5
The position encoder signals are converted to ITL level by the encoder matching module and
are transferred as actual values to the basic module.
The setpoints (i.e., the initial and end values of the cams for each required track) are stored in a
data block (IP 241) of the user program.
The standard function block FB 156 transfers these values to the 1P 241.
Interrupt identifiers for the initial and end values of each track can be specified.
Interrupt identifiers for zero shift values can be selected separately for channel 1 and channel 2.
The 1P 241 compares the actual values with the setpoints and sets the corresponding track
identifier bits.
The track identifier bits and the interrupts can be read in for processing in the programmable
controller (e.g., via the standard function block FB 157).
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