FlexiMod – Individuality in the standard module

FlexiMod – Individuality in the standard module

FlexiMod offers a simple concept to integrate custom solutions for electrohydraulic applications, while main-taining the advantages of continuous deliverability of standard solutions and the individuality of customer-specific designs.

Under the guiding principle “parameterization instead of programming”, W.E.St. Elektronik GmbH has developed the script-based concept, “FlexiMod” which eases the implementation of customer-specific functions in a commonly available product line. The concept is based on a standardized hardware architecture with a core of basic control functions and a flexible engine that complements the base with user defined operations. Due to the simplicity of the script-based engine, there are almost no programming skills required to compose custom solutions.

In its basic configuration all input signals like process and setpoint values are simply mapped 1-to-1 to the available outputs, either analogue outputs or the power stage output directly controlling the valve.

The actual function for meaningful processing of the signals can be freely defined by the script. No programming knowledge or experience with common PLC programming languages is required. The script editor is clearly divided into rows and columns, with each row basically reflecting the result of an operation and each column defining the input signals of the operation. These are then processed cyclically line by line from top to bottom.

The script provides logic operators, time functions and mathematical operators as well as some special func-tions. With this it is possible to extend functionality from generating a simple saw tooth signal profile to more complex tasks, such as closed loop controls.

We also offer variants that already provide a basic functionality as factory default, for example for positioning control. This basically allows to immediately get into the customization part of the design by implementing individual operations within the pre-set control function without having to implement the baseline positioning task first.

The script environment “WestScript” is available as a free download. It allows online and offline configuration as well as simulation. The integrated oscilloscope tracks the signal curves of up to 4 different operations offline during implementation or online during com-missioning and operation. So that the behavior can be validated and, if necessary, be adjusted prior or during commissioning and maintenance.

The hardware architecture of the new series offers a new core with higher processing power that allows a constant cycle time of not more than 1ms, independ-ent of the length of the script. FlexiMod is a platform-based solution and re-uses expansions of our current platforms, so that we can provide e.g. derivatives with or without power output stage or network connectivity from stock. The base comes with analog and digital inputs/outputs which can be assigned flexibly to process and setpoint signals via the configuration in the script. That means that, that in many cases, additional PLC hardware such as analogue I/O units are no longer necessary.

When individual solutions are requested, they are usually provided as order-based engineering service by component manufacturers or implemented in a PLC program at high efforts. In both cases, the related expenses in terms of cost and time to implement the function as well as the requirements related to HW performance and expertise of the implementing per-sonal are not insignificant. It is not unusual that it takes months. In contrast, the effort involved in script de-velopment is reduced to days or maybe a few weeks. W.E.St. Elektronik offers both the service to develop scripts for customers upon request and the assistance/guidance for customers developing their own script. It is also possible to get an OEM version of the product, which already has the individual configuration on board as factory default.

Due to its flexibility and adaptability FlexiMod can be considered the swiss-army-knife of electrohydraulic controls that can be utilized to execute many differ-ent control tasks. It is ideal e.g. as functional replacement for control units when machines are renewed or repaired to reproduce the previous functionality with a more contemporary solution.

An advantage that system integrators and/or machine builders typically benefit from is that with just a few catalog numbers, different configurations can be mapped, which are integrated into different variants of your systems/machines. At the same time, the logistics related to procurement and warehousing become easier, since only one hardware basis must be kept on stock instead of different derivatives.
The first devices with the FlexiMod Engine are DSG-112-U, with analog outputs, and DSG-112-P, with power output stage for direct control of valve mag-nets. They are completely free configurable and pro-vide the full FlexiMod capability.

New: POS-123-P-PFN

New: POS-123-P-PFN

New to our family of hydraulic axis positioners is now a module with integrated power stage and Profinet interface. This combination allows cost-effective and robust proportional valves to be used without internal electronics. The Profinet interface enables seamless data exchange with the machine control system. Setpoints and actual values are transmitted digitally and without loss of accuracy. Extensive diagnostic information is available. The unit can be fully parameterised via the free WPC-300 program as well as via the Profinet interface. For this option, we provide a convenient function block for controllers of the Simatic S7 series. This also makes it possible to save parameter sets in the PLC and automatically write them back in the event of a device replacement.

Perfect synchronisation

Perfect synchronisation

With the UHC-126-U-S2 we have developed no less than three units with identical functions but different fieldbus interfaces to make even demanding synchronisation applications easily manageable. The ideal device technology for presses, motion drives and all other applications where power and precision are important.

The UHC-126…S2 features a distributed synchronisation system, a new and very robust approach. The patented MR controller linearises the controlled systems and completely eliminates interactions between the individual axis control loops.

Furthermore, the solution enables a theoretically unlimited number of synchronised axes and a high accuracy of the position measurement due to the possibility of connecting SSI sensors; alternatively, an analogue sensor interface is available. There is also the option of a superseding pressure control, in which the effective force of the cylinders can also be controlled. In addition, driver modules for Simatic PLCs are available for simple and fast integration into the machine control system.

WPC-300 4.0 – Simpler and more efficient configuration and monitoring

WPC-300 4.0 – Simpler and more efficient configuration and monitoring

W.E.St. Elektronik GmbH has enhanced its intuittive configuration software to ease and accelerate start-up and diagnostics procedures even more. Generally software based solutions haven become an essential tool complementing screw drivers and voltmeters to reduce downtown during commissioning and maintenance phases. With WPC-300 I/O Data as well as target values can litterly be caught at the same time, together with oscilloscope showing and recrding live values. The software is compatible with all previpous and current versione of our products. So no trouble to find the compatible version to connect to an installed device. Download WPC

New GL certification for our best-selling power amplifier

New GL certification for our best-selling power amplifier

We have recently renewed the GL certification of PAM-199-P to comply with the latest requirements of contemporary marine applications in shipping and in offshore segments. The power amplifier is typically applied for control of directional, throttle and pressure valves, which require flexible adaptation. The integrated power amplifier with a short cycle time of 0,125 ms for the current loop is an inexpensive and space-saving solution. Its versatility allows to control typical proportional valves from various manufacturers with a minimum of commissioning effort.
Find the certificate here: GL-Certifikate PAM-199-P

Automatically the right pressure for your press

Automatically the right pressure for your press

The tried and tested made even better: MDR-337-P with commissioning assistant

Our MDR-137-P module has been tried and tested for years for pressure control in combination with proportional pressure valves or variable pumps and has been extremely successful. Now with the new MDR-337-P we can once again present a clear upgrade of the concept. New in this module is the function for characteristic-based pilot control and the commissioning assistant, which perfectly matches the pilot control to your application and also performs the controller optimization automatically.

For you as a user, this has tangible advantages:

You benefit from a really exact linearization …
… but have no additional effort!

You save the time that you would otherwise invest in setting the controller parameters …
… but have an excellent result immediately!

Would you like to learn more? Complete technical information is available here: Application Note AN-104

Or just contact one of our technicians:    Tel. +49-2163-577355-18 or email technics@w-e-st.de.

Application example for IO-Link power plug

Application example for IO-Link power plug

The Spinner company consistently relied on I/O-Link when designing the MICROTURN series. A coherent wiring and shielding concept made the decision for I/O-Link easy for the medium-sized machine manufacturer. Especially in connection with the Spinner Touch surface “SPIOS” a perfect commissioning and diagnostic tool was created. All actuators/sensors can be parameterized and analyzed with the aid of the surface. In line with Industry 4.0, a complete database for signal exchange was created here. The I/O-Link valve amplifier from W.E.St. Elektronik enables the operator to optimally adjust the clamping pressure of the chuck to the clamping requirement. This is done comfortably via the user interface, but the pressure can also be “reprogrammed” variably by the NC program. The compact design of the valve amplifier and simple integration into the I/O-Link platform spoke in favor of the W.E.St. Elektronik.

IoT enabled allrounder for pressure regulation and positioning UHC-126-U

IoT enabled allrounder for pressure regulation and positioning UHC-126-U

The universal hydraulic controller with Profinet, Profibus or EtherCAT interface

UHC-126-U

This electronic module for position and pressure control is controllable via the Profinet/Profibus/EtherCAT interface and it can be integrated in the existing control system simply and quickly. Function blocs for the PLC S7 are available. The position controller was revised in order to fulfill special requirements. Best dynamics and highest position accuracy are the result of this development.

Technical Data: UHC-126-U

In addition to the standard positioning, the following options are implemented:

  • Direct control, at any time the command position can be changed via fieldbus
  • Rapid/creep speed for automatic drive of predefined profiles
  • Drift compensation for a correct zero-point adjustment, controllable via fieldbus
  • Accurate positioning to compensate positioning deviations caused by external forces
  • Stroke dependent deceleration or NC control
  • P or PT1 position controller, for stable and dynamic positioning
  • Acceleration feedback for stabilization of critically controlled axes
  • MR-Control function to linearize the hydraulic axis. An absolute linear behaviour, controlled by the robust MR function can be activated.
  • Simplified and intuitive parameterization

Additionally, a PQ pressure control function can be activated (with or without position control). In PQ mode, typically both pressures will be measured to build the differential pressure.

Functionality:

  • optimized PID controller
  • a dynamic integrator can be activated to minimize pressure overshoots
  • two switchable PID parameter sets

The interface to the PLC is a Profinet interface. In view of Industry 4.0, all command values and all feedback (process data) are available in the protocol. Parameterization of the module via the bus is also possible.

Power plug with IO-Link Interface – PAM-190-P-IO

Power plug with IO-Link Interface – PAM-190-P-IO

 

IO-Link, a universal and cost effective interface to control hydraulic valves (control valves and proportional valves).

Available! The IO LInk plug amplifier for proportional valves. The IO Link interface allows a seamless integration with the rest of your control solution and hences reduces to overall engineering effort to maintain various implementaion across the application. We will continue to expand the connectivity via IO Link. Next in line will be the amplifier version for control valves.