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Entry type: Application example Entry ID: 109756217, Entry date: 05/12/2020

SIMATIC S7-1500(T): "LSimaHydTO" for hydraulic applications and hydraulic presses

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The "LSimaHydTO" block library enables closed-loop control of hydraulic axes with the SIMATIC S7-1500(T). With the help of modular function blocks, it is possible to realize not only valve-controlled hydraulic applications, but also those with variable-RPM pump drive (servo pump).

The "LSimaHydTO" block library enables closed-loop control of hydraulic axes with the SIMATIC S7-1500(T).

Hydraulic axes are not directly supported in the current firmware version of the SIMATIC S7-1500(T) controller. With the help of modular function blocks from the "LSimaHydTO" block library in extension to the technology objects of the SIMATIC S7-1500(T), both valve-controlled hydraulic applications as well as those with variable-RPM pump drive (servo pump) can be realized.

The Motion Control functions of the positioning/synchronization axis technology objects of the SIMATIC S7-1500(T) can be used for motion control of the included hydraulic axes.

Fig. 1: Running a hydraulic axis on a SIMATIC S7-1500(T)

The following core functions are contained in the "LSimaHydTO" block library or in the included example program:

  • Closed-loop control of hydraulic axes by means of a closed-loop controller contained within a function block; the closed-loop controller is run in the "MC-PostServo" OB in the controller and contains the following functions:
    • Closed-loop control of a hydraulic axis.
    • Pressure and force control of a hydraulic axis with direct switchover between position and pressure regulation.
  • Various ways of driving hydraulic axes:
    • Analog output of the setpoint value for driving hydraulic axis valve(s).
    • Output of an RPM setpoint value via PROFIdrive telegram for driving a hydraulic axis with the help of a servo pump, for example, driven via the SINAMICS S120 drive system.
  • Compensation for nonlinearities of the drive valve in a hydraulic axis by means of a valve characteristic curve, which can be integrated into the closed-loop control.
  • Function blocks for simulating a hydraulic axis in order to easily test the contained functionalities.
  • HMI user interface for monitoring & control of the movements of the hydraulic axis, as well as for entering the axis parameters and automatic measurement of the compensation characteristic curve of the hydraulic valve being used/simulated.

The application can run on any S7-1500 Standard and Technology CPU, as well as on the SIMATIC ET200 SP Open Controller.


License conditions and copyright notices of Open Source Software (HMI): 
 Registrierung notwendig  ReadMe_OSS - material-design-icons - V3.0.1 (21,7 KB) 

The application "SIMATIC SimaHyd", formerly offered in this article, has been completely replaced by the "LSimaHydTO" block library. If you still need this application, please contact your Siemens sales representative to obtain the software.
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Additional keywords
motioncontrol_apc_applications, Hydraulische Presse, Servopumpe, Hydraulik, SimaHyd, Druckregelung, Proportionalventil, Hydraulikzylinder, Ventilkennlinie, hydraulic press, servo pump, hydraulic, pressure control, proportional valve, hydraulic cylinder, valve characteristic

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