Technical documentation

More documents

Recommendations

Info

General description W.E.ST. Elektronik GmbH This electronic module is developed for controlling of hydraulic positioning drives. A typical signal accuracy of app. 0,01% of the sensor stroke can be achieved. The sampling time of the control loop is 1ms. Proportional valves with integrated electronics or external power amplifiers can be controlled by the analogue differential output (or by the 4… 20 mA current output). Additionally an integrated power amplifier for best performance is available. Internal profile generation (acceleration time, max. velocity and stroke depended deceleration) provides fast and excellent positioning. Two modes can be selected. Stroke depended deceleration: The axis drives in open loop mode and is switched over in closed loop during deceleration. This is a time-optimal positioning structure with very high stability. The maximal velocity can be limited by the external velocity input. NC mode: An integrated NC profile generator (VMODE command) can be activated. The position profile is internally generated with defined speed and the axis is following (controlled by the following error) the command position with the same speed. Internal functions, InPos, out of stroke and sensor or command failure are monitored by the two digital outputs: ready and status. The adjustment via RS232C is simple and easy to understand. A standard terminal program or our special windows application software (WPC-300, download from our homepage) can be used. Typical applications: positioning drives, handling axis and fast transportable drives (adaptation of nonlinear valve characteristics). Features • Extern definable target positions • High speed positioning mode • Principle of stroke depended deceleration or NC controlled movement (speed controlled) • Optimal use of overlapped and zero overlapped proportional valves • Internal profile, defined by acceleration time, max velocity and deceleration stroke • Extern definable velocities • Simple and application orientated parameter settings • Failure monitoring • Adjustments via RS232C interface Seite 4 von 24
General installation remarks Explanation of terms and notes on safety Terms: w: command signal x: actual signal v external speed xw: error between w and x (x- w) u: output signal W.E.ST. Elektronik GmbH Mounting instructions This module is for the installation provided in shielded electromagnetic compatibility housing (EMC conform). All cables operating outside have to be screened. A complete shielding is presupposed. By use of our control modules it is also presupposed, that no strong electrical disturbances near the module are installed. Typical mounting area: 24V control signal area (near PLC) By the arrangement of the electrical cabinet a separation between power part (and power cables) and signal part must be taken in consideration. Experience shows us that the area next to the PLC (24 V area) is suitable. All digital and analogue inputs and outputs have filters and an over voltage protection. In case of correct wiring and shielding all EMC demands are fulfilled. If there are nevertheless any problems, please send us detailed sketches of mounting and wiring. We will look after this problem immediately. Even if all EMC-norms are fulfilled, technical problems in special cases are possible. Our experience has shown us that most of these problems are caused in the physical conditions of the cables. If everything is shielded continuously and configured correctly, no problems have to be expected. ATTENTION! ATTENTION! Due to electrical disturbances, failure at components as well as software faults can cause in individual cases uncontrolled movements at the drive. Appropriate safety precautions have to be considered during the engineering. Connection and start up of the module may only be allowed by qualified persons who have, because of education, experience and instruction, sufficient acknowledge on relevant directives and approved technical rules. Please read and follow the operating instructions carefully. In case of non observance of the instruction the guaranty and liability claim expires. Seite 5 von 24
Page 1 and 2: W.E.ST. Elektronik GmbH Technical d
Page 3: Revisions W.E.ST. Elektronik GmbH D
Page 7 and 8: In- and outputs W.E.ST. Elektronik
Page 9 and 10: Typical wiring PLC Inputs PLC Outpu
Page 11 and 12: W.E.ST. Elektronik GmbH General IO
Page 13 and 14: W.E.ST. Elektronik GmbH As current
Page 15 and 16: Parameter table W.E.ST. Elektronik
Page 17 and 18: D (deceleration stroke or braking d
Page 19 and 20: W.E.ST. Elektronik GmbH TH (Stroke
Page 21 and 22: INPOS (in positioning window) W.E.S
Page 23 and 24: W.E.ST. Elektronik GmbH Appendix: P

Technical documentation

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?