Switching between PWMi and analog output

Mode selection via the PDOs

PWMi mode or analog mode can be selected for operating a proportional valve at socket 7, for example.

  • In PWMi mode (default) the coil is controlled directly via a PWM signal. The valve requires no control electronics.
  • In analog mode a current value of 0...20 mA or 4...20 mA is output, via which the control electronics integrated in the valve controls the valve travel.

The 24VDC supply is switched on continuously.

The different modes are activated via the PDO assignment.

PWMi mode

The output PDO 0x1602 activates the PWMi mode.

Switching between PWMi and analog output 1:
Switching the PWMi/analog output - PWMi mode

Analog mode

The output PDO 0x1603 activates the analog mode.

Switching between PWMi and analog output 2:
Switching the PWMi/analog output - analog mode