HowToUseHBRidge

Supported platforms: CODESYS 3.5 SP19 SAFETY

How to use H-Bridge controller

This section describes how to use S_HBridgeControllerDO POU to control for example electric linear actuator.

This example uses the following libraries:

S_HBridgeControllerDO (FB)

Depending on hardware, output group control needs to be activated before controlling outputs. See How to use S series and E series HW diagnostics for more information.

External voltage detection in output pins is provided by safety control unit's safety switch startup test. The startup test execution depends on used product:

SC4X/SL8X/SM8X: startup test execution is triggered by application. See also How to use S Series and E Series HW diagnostics

After startup test the external voltage is monitored by application library diagnostics.

Example code

SL8X1 Safety Control Unit is used in the example.

In MultiTool Creator define two DIs which are used to request linear actuator control.

And define two DOs, which has possibility to control both pin high side and low side, for example SL8X1 pins 2.40 and 2.41.

Safe PRG:

Init method:

IF NOT inited THEN
   actuatorControl.Init(S_i_OverCurrentLimit:= UINT#4000,
                       S_i_CurrentDiagnosticDelay:=UINT#500 ,
                       S_i_ControlStopDelay:=UINT#500 ,
                       i_pEventCode:= ADR(actuatorEvent));
   inited := TRUE;
END_IF