Switching between PWM and analog output

Mode selection via the PDOs

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

• In PWM 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 24V_DC supply is switched on continuously.

The different modes are activated via the PDO assignment.

PWM mode

The output PDO 0x1602 activates the PWM mode.

Analog mode

The output PDO 0x1603 activates the analog mode.