J
Jacob DukeSep 22, 2025
What does «D C» mean on my VAT Control Unit?
- JJohn SandersSep 22, 2025
If your VAT Control Unit display shows «D C» or «D999», indicating the Motor Interlock is open, ensure that power is supplied to the motor.
To Next PageTo Next PageWhat does «D C» mean on my VAT Control Unit?
If your VAT Control Unit display shows «D C» or «D999», indicating the Motor Interlock is open, ensure that power is supplied to the motor.
Why is the pressure reading wrong on my VAT Control Unit?
If the pressure reading on your VAT Control Unit is wrong or negative, verify the following: - Ensure the sensor(s) are properly connected. - Confirm if a 2-sensor version is present at the valve controller and verify configuration. - Perform ZERO when base pressure is reached. - Verify the sensor supply voltage.
How to fix no dots lighted on VAT Control Unit display?
Connect the valve to the power supply according to «Electrical connection» and ensure that the power supply is working.
What does «E 40» mean on VAT 650 Control Unit?
If the display shows «E 40» (fatal error - motor driver failure detected), replace the control and actuating unit according to « Maintenance procedure ».
What does «E 20» mean on VAT Control Unit and how can I fix it?
If the display shows «E 20» (fatal error - limit stop of valve unit not detected), it might be caused by the valve plate not being properly mounted. Replace the control and actuating unit according to « Maintenance procedure ».
What does «E 22» mean on VAT Control Unit and how to fix it?
If the display shows «E 22» (fatal error - rotation angle of valve plate limited during operation), it could be due to a heavily contaminated valve unit or a mechanically obstructed valve plate. You should: * Clean the valve unit according to « Maintenance procedure ». * Resolve any obstruction.
What does «E 21» mean on VAT 650 and how to fix it?
If the display shows «E 21» (fatal error - rotation angle of valve plate limited during power up), the possible causes are: the valve plate isn't properly mounted, the valve unit is heavily contaminated, or the valve plate is mechanically obstructed. To solve this: * Adjust the valve plate according to «Maintenance procedure». * Clean the valve unit according to « Maintenance procedure ». * Resolve any obstruction.
Why VAT Control Unit does not respond to DeviceNet commands?
If the VAT Control Unit does not respond or responds unexpectedly to DeviceNet® commands, the configuration may be incorrect. Send a FACTORY RESET and redo the complete configuration.
What to do if my VAT 650 Control Unit display shows «E 40» (fatal error - motor driver failure detected)?
If your VAT Control Unit displays «E 40», which indicates a fatal error due to motor driver failure, replace the control unit according to the procedures outlined in «Maintenance procedures».
Why does ZERO not work on my VAT 650?
If ZERO does not work on your VAT Control Unit, ensure the valve is in the open position and the chamber is at base pressure before performing ZERO. Also, check if ZERO is enabled.
General| Supply voltage | 24 VDC |
|---|---|
| Digital inputs | 8 |
| Digital outputs | 8 |
| Analog inputs | 4 |
| Analog outputs | 2 |
| Mounting | DIN rail |
| Output Voltage | 24 VDC |
| Current Rating | 2 A |
| Weight | 0.5 kg |
| Communication interface | RS-485 |
| Protocols | Modbus RTU |
| Protection | Short-circuit, overload |
Provides detailed specifications for the control and actuating unit.
Covers unpacking, system installation, and connector panel overview.
Details tightening torque, admissible forces, and mounting requirements.
Covers sensor connection requirements and electrical wiring details.
Covers CC-Link cable installation, connectors, network, and valve cluster connection.
Overview of valve cluster, operational modes, and basic behaviors.
Describes valve behavior during power up/failure and display information.
Essential steps for configuring the valve cluster for operation.
Configures unique cluster addresses and CC-Link parameters.
Adapting valve configuration and setting up ZERO/LEARN.
Managing position control, pressure control, and performance tuning.
Detailed adjustments for gain factor, sensor delay, setpoint ramp, and valve speed.
Details on CC-Link schematics, handshaking, buffers, and communication timing.
Overview and details of OUTPUT and INPUT buffers for PLC communication.
Identifies common failures, troubleshooting steps, and CC-Link warnings.
Recommended maintenance schedules for seals and valve cleaning.
Information on option boards, battery life, and replacement procedures.
A labelled diagram showing the main components of the valve.
Lists spare parts for control and valve units, including seals and boards.
Details available accessories like power supplies, software, and centering rings.
Outlines the warranty terms and conditions for VAT products.
