Interrupts; Position Detection For Motion Control - Siemens SIMATIC ST-1500 Function Manual

The basics of counting, measurement and position detection
2.2 Basics of counting, measuring and position input (TM Count, TM PosInput, Compact CPU)
2.2.11

Interrupts

Hardware interrupt
The technology module can trigger a hardware interrupt in the CPU if, for example, a
comparison event occurs; in the event of overflow or underflow; in the event of a zero
crossing of the counter and/or of a change in count direction (direction reversal). You can
specify which events are to trigger a hardware interrupt during operation.
Diagnostic interrupt
The technology module can trigger diagnostic interrupts in the event of errors. You enable
the diagnostic interrupts for certain errors in the device configuration. Refer to the device
manual for the technology module to learn about the events that can trigger a diagnostic
interrupt during operation.
2.2.12

Position detection for Motion Control

Description
You can use the technology module with S7-1500 Motion Control for position detection.
In the device configuration of the technology module in STEP 7 (TIA Portal), select "Position
input for technology object "Motion Control"". This reduces the configuration options to the
parameters that are essential. For TM Count or TM PosInput, the mode automatically applies
to all channels of the technology module. For a Compact CPU, the mode automatically
applies to the respective channel.
When using an incremental or pulse encoder, the position input is based on the counting
function of the technology module. With an SSI absolute encoder, the absolute value is read
in via a synchronous, serial interface and prepared according to the parameter assignment
and made available for S7-1500 Motion Control.
You can find information about the remaining configuring steps in the help for the axis
technology objects of S7-1500 Motion Control.
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Counting, measurement and position detection
Function Manual, 12/2017, A5E32009889-AG