Moog ACV with CANopen bus interface 7 Servo valve functions
Control modes
B99224-DV018-D-211, Rev. A, October 2018 127
The servo valve can be used to control the spool position (≈ flow) and / or the pressure, axis position, axis ve-
locity or the flow. For these tasks the following control structures are implemented:
• Spool position controller (configured by Moog)
Chapter "7.3 Spool position controller", page 153
• Pressure controller (configured by user)
Chapter "7.5 Pressure controller", page 168
• Pressure demand signal polarity
Chapter "7.4.6 Pressure demand signal sign", page 167
• Spool position (Q) / pressure (P) switchover
Chapter "7.6 Spool position (Q) / pressure (P) switchover", page 187
• Axis position controller
Chapter "7.8 Axis position controller", page 195
• Axis velocity controller
Chapter "7.10 Axis velocity controller", page 209
• Flow controller
Chapter "7.12 Flow control", page 218
• Flow (Q) / pressure (P) switchover
Chapter "7.13 Flow / pressure (P) switchover", page 228
With these control structures the user can build several controllers depending on the <ControlMode>
(0x6043).
7.1 Control modes
The servo valve can be run in the following control modes. The control mode of the servo valve is set with the
parameter <ControlMode> (0x6043).
<ControlMode> Meaning
1 Spool position control open loop
Used for tests
Chapter "7.1.3 Spool position control open loop for single stage valves", page 129
2 Spool position control closed loop
Spool position control
Chapter "7.1.5 Spool position control closed loop for single stage and dual stage valves", page 130
3 Pressure control open loop
Used for tests. Behaves like a closed loop Q control.
Chapter "7.1.6 Pressure control open loop", page 130
4 Pressure control closed loop
Pressure / force control
Chapter "7.1.7 Pressure control closed loop", page 130
5 p/Q control
In many applications the p/Q controller is used as Q controller with pressure/force limiting.
Chapter "7.1.8 p/Q control closed loop", page 131
7 Axis velocity control
Chapter "7.10 Axis velocity controller", page 209
8 Axis force control (equal to the pressure closed loop control)
Chapter "7.1.7 Pressure control closed loop", page 130
9 Axis position control
Chapter "7.8 Axis position controller", page 195
13 Flow control
Chapter "7.12 Flow control", page 218
14 p/flow control
In many applications the p/flow controller is used as flow controller with pressure/force limiting.
Chapter "7.13 Flow / pressure (P) switchover", page 228
Table 69: Control mode values
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