Technology Objects For Pid Control - Siemens SIMATIC S7-1500 Manual

1 SIMATIC's Technology Objects
1.3 SIMATIC S7-1500 and SIMATIC S7-1500T

Measuring input (TO_MeasuringInput)
The "measuring input" (TO_MeasuringInput) technology object precisely
detects the actual position of an axis or external encoder. The measurement is
triggered with a rising and/or falling edge of a digital input. The measurement
results can be evaluated in the user program.

Cam disk (TO_Cam) – (only S7-1500T)
The cam disk technology object defines a transfer function y = f(x). On a unit-
neutral basis, the dependence of an output variable on an input variable is
described in this transfer function. As a result, for example, the non-linear
dependence of the slave axis position to a master axis in a synchronous
coupling can be defined. A cam disc technology object can be used multiple
times in different technology objects.
In comparison to SIMATIC S7-1500, the SIMATIC S7-1500T additionally supports
the expanded synchronous functions. They offer the user the following further
functions:

Gearing can also create an absolute coupling of the slave axis to the master
axis, besides the relative coupling.

Besides gearing, the SIMATIC S7-1500T also offers support to curve
synchronization, via which the coupling of two axes can be carried out with the
help of a generally formulated transmission function.

For a synchronous coupling of two axes, the actual position (actual value
coupling) of another axis of an external encoder can be also be used as
conductance.
1.3.2

Technology objects for PID control

Figure 1-2 Technology objects of the S7-1500 – PID control
TOs of S7-1500(T)
Entry ID: 109743134, V1.0, 05/2017
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