Related Manuals for WEST PAM-195-P-PVG
Summary of Contents for WEST PAM-195-P-PVG
- Page 1 Technical Documentation PAM-195-P-PVG Power amplifier for directional valves with ratiometric input...
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Page 2: Table Of Contents
5.5.7 IPWM (Solenoid current controller I gain) ....................24 Process data (Monitoring) ..........................24 Appendix ..................................25 Failure monitoring ............................... 25 Troubleshooting ..............................25 Description of the command structure ........................ 26 Notes ..................................27 Page 2 of 27 PAM-195-P-PVG 18.06.2019... -
Page 3: General Information
1 General Information Order Number PAM-195-P-PVG-2230 - power amplifier for directional valves with integrated power limitation function Scope of supply The scope of supply includes the module plus the terminal blocks which are a part of the housing. The Profibus plug, interface cables and further parts which may be required should be ordered separately. -
Page 4: Symbols Used
We reserve the right to make technical modifications due to further development of the product described in this manual. The technical information and dimensions are non-binding. No claims may be made based on them. This document is protected by copyright. Page 4 of 27 PAM-195-P-PVG 18.06.2019... -
Page 5: Safety Instructions
The module may not be used in an explosive environment. To ensure adequate cooling the ventilation slots must not be covered. The device must be disposed of in accordance with national statutory provisions. Page 5 of 27 PAM-195-P-PVG 18.06.2019... -
Page 6: Characteristics
Free parameterization of RAMPS, MIN und MAX, output current, DITHER (frequency, amplitude) Nominal output current range: 0,5… 2,6 A Simple and application orientated parameter settings via WPC-software Failure monitoring and extended function check Page 6 of 27 PAM-195-P-PVG 18.06.2019... -
Page 7: Device Description
Made in Germany Date: Add.: W.E.ST. Elektronik D-41372 Niederkrüchten Homepage: http://www.w-e-st.de Typenschild und Anschlussbelegung Type plate and terminal pin assignment W.E.ST. LEDs Ready Klemmblöcke (steckbar) Terminals (removable) interface 9 10 11 12 14 15 16 Page 7 of 27 PAM-195-P-PVG 18.06.2019... -
Page 8: Use And Application
Switched inductances (relays and valve coils connected to the same power supply) must always be provided with appropriate overvoltage protection directly at the coil. Page 8 of 27 PAM-195-P-PVG 18.06.2019... -
Page 9: Commissioning
CAUTION! The drive can now leave its position and move to an end position with full speed or the pressure can reach maximum. Take safety measures to prevent per- sonal injury and damage. The amplifier can be controlled now via the command value input. Page 9 of 27 PAM-195-P-PVG 18.06.2019... -
Page 10: Function Modes And Technical Description
Error detected (e. g. valve solenoid or 4… 20 mA). Flashing: Not active when SENS = OFF. YELLOW LED in the middle position = Current to the solenoid; the intensity is proportional to the actual output current. Page 10 of 27 PAM-195-P-PVG 18.06.2019... -
Page 11: Typical System Structure
(*1) proportional valve (*2) hydraulic cylinder (*3) power amplifier PAM-195-P-PVG (*4) reference supply and ratiometric signal Method of operation This power amplifier is controlled by a ratiometric input signal (normally from a joystick). That means 25% up to 75% of the separately measured voltage value are used as command signal. 50% are the zero position. An ENABLE signal (typically 24V) activates the module and the READY output indicates this, if no internal or ex- ternal error was detected. -
Page 12: Input And Output Signals
The output and the READY signal will be activated. By deactivating error signals are reset. READY output: PIN 5 Module is ready, no errors are detected OFF: ENABLE (PIN 15) is deactivated or an error is detected. Page 12 of 27 PAM-195-P-PVG 18.06.2019... -
Page 13: Circuit Diagram
Circuit diagram Page 13 of 27 PAM-195-P-PVG 18.06.2019... -
Page 14: Typical Wiring
Ratiometrischer Sollwert / ratiometric command signal Versorgung Sollwertgeber / Supply of setpoint device Enable Input connection (examples) Potentiometer / Joystick Supply voltage PIN 14 Signal in PIN 9 0V PIN 10 GND PIN 11 Page 14 of 27 PAM-195-P-PVG 18.06.2019... -
Page 15: Technical Data
Storage temperature [°C] Humidity <95 (not condensing) Vibration IEC 60068-2-6 (category C) Connections USB type B 4 x 4pol. screw terminals PE: direct via DIN rail EN 61000-6-2: 8/2005 EN 61000-6-4: 6/2007 ; A1:2011 Page 15 of 27 PAM-195-P-PVG 18.06.2019... -
Page 16: Parameter
Parameters of the power stage CURRENT 1000 Rated solenoid current DAMPL 0.01 % Dither amplitude DFREQ Dither frequency 2604 PWM frequency Current loop auto adjustment PPWM P-Gain of the current loop IPWM I-Gain of the current loop Page 16 of 27 PAM-195-P-PVG 18.06.2019... -
Page 17: Basic Parameters
READY output. Deactivating is possible especially for troubleshooting. AUTO MODE: The module checks each second the actual failure status, which will (in case of a per- sistent error) trigger the LED and the READY output for a short time. Page 17 of 27 PAM-195-P-PVG 18.06.2019... -
Page 18: Ccmode (Activation Of The Characteristic Linearization)
The percentage values refer to the ratiometric sig- nal. If the input signal increases above 90% or de- creases below 10% it will be detected as error. Error range Working range Page 18 of 27 PAM-195-P-PVG 18.06.2019... -
Page 19: Ra (Ramp Function)
A. According to this the third quadrant represents the acceleration ramp for solenoid B so that the fourth quadrant remains for the deceleration ramp for solenoid B. ATTENTION: Because of internal calculations rounding errors may be occur on the display. RA:2 RA:1 RA:3 RA:4 Page 19 of 27 PAM-195-P-PVG 18.06.2019... -
Page 20: Output Signal Adaption
For the input of the characteristics linearization, the WPC-300 program provides a table and a graphic data input. The input signal is mapped on to the X-axis and the output signal is mapped on to the Y-axis. Page 20 of 27 PAM-195-P-PVG 18.06.2019... -
Page 21: Min (Overlap Compensation)
This dead band is necessary, in order to avoid unrequested activations caused by small variations of the input signal. If this module is used in a position controls, the TRIGGER value should be reduced (typical: 1…10). Page 21 of 27 PAM-195-P-PVG 18.06.2019... -
Page 22: Signal:u (Output Polarity)
The DITHER frequency should not be confused with the PWM frequency. In some proportional valve documentations a mistake is done by the definition of the DITHER / PWM frequency. It is recognizable by missing information about the DITHER amplitude. Page 22 of 27 PAM-195-P-PVG 18.06.2019... -
Page 23: Pwm (Pwm Frequency)
5.5.5 ACC (Auto adaptation of the closed loop current controller) Command Parameters Unit Group x= ON|OFF Operation mode of the closed loop current control. In automatic mode PPWM and IPWM are calculated depending on the preset PWM-frequency. OFF: Manual adjustment. Page 23 of 27 PAM-195-P-PVG 18.06.2019... -
Page 24: Ppwm (Solenoid Current Controller P Gain)
Output signal to power stage Current to solenoid A Current to solenoid B Reference supply voltage The process data are the variable values which can be continuously observed on the monitor or on the oscillo- scope. Page 24 of 27 PAM-195-P-PVG 18.06.2019... -
Page 25: Appendix
Internal data error: execute the command / press the button SAVE to delete the data error. The system reloads the DEFAULT data. With the WPC-300 operating program the failure can be localized directly via the monitor. Page 25 of 27 PAM-195-P-PVG 18.06.2019... -
Page 26: Description Of The Command Structure
Examples: nnnn = “MIN”, i = “A” and x = “2000” MIN:A 2000 nnnn = „OFFSET“ and x = „50“ OFFSET 50 nnnn = “C”, i = “IC” and x = “2000” C:IC 2000 Page 26 of 27 PAM-195-P-PVG 18.06.2019... -
Page 27: Notes
7 Notes Page 27 of 27 PAM-195-P-PVG 18.06.2019...