Pulse Width Modulation Configuration

Overview

2 PWM channels can be configured on the controller.

NOTE:

oEach PWM uses 1 fast output and 2 normal digital inputs.

oPTO or PWM can be configured on channel 0.

oIf PTO is selected for channel 0, PWM on channel 1 cannot be used.

oOnly PWM can be configured on channel 1.

Open the Configuration Window

Step	Action
1	In the Devices tree, double-click HMISCUxx5 > Embedded Functions > PTO_PWM.
2	Select a PTO 0 tab.
3	In the PTO / PWM > PTO00 > Mode drop-down menu, select PWM. Result: The PTO 0 tab Variable becomes PWM00 and the PTO 1 tab Variable becomes PWM01.

Step

Action

In the Devices tree, double-click HMISCUxx5 > Embedded Functions > PTO_PWM.

Select a PTO 0 tab.

In the PTO / PWM > PTO00 > Mode drop-down menu, select PWM.

Result: The PTO 0 tab Variable becomes PWM00 and the PTO 1 tab Variable becomes PWM01.

Configuration Window Description

This table describes each parameter available when the embedded PTO_PWM is configured in PWM mode:

Parameter		Value	Default Value	Unit	Description
Mode		Not Used PTO ¹ PWM Frequency Generator	Not Used	–	The mode selected is PWM. NOTE: ¹ This is not an option in PTO 1 tab. It is only supported for PTO 0 tab.
Auxiliary Inputs	EN	Disabled Enabled	Disabled	–	Enables the EN physical input to be used for enabling the functionality.
	EN Filter	3 12	3	ms	Defines the value of the EN filter value.
	SYNC	Disabled Enabled	Disabled	–	Enables the IN_SYNC input to be used for synchronization.
	SYNC Filter	3 12	3	ms	Defines the value of the IN_SYNC filter value.
	SYNC Edge	Rising Edge Falling Edge Both Edges	Rising Edge	–	Defines the IN_SYNC edge on which synchronization occurs.

Configure a PWM Channel

Step	Action
1	Enable the PWM channel: Set the Mode parameter to PWM. Result: SoMachine creates a variable named PWM00 or PWM01 depending on the selected channel. NOTE: You can rename the variable by entering a new name in the Variable field. When creating a PWM function block, you can find the Global Variable name representing the channel from the Input Assistant when naming the block.
2	In the list box of EN parameter, enable/disable the EN Filter physical input.
3	Configure the filter value of the EN Filter input (if enabled in step 2).
4	In the list box of SYNC parameter, enable/disable the SYNC Filter physical input.
5	Configure the filter value of the SYNC Filter input (if enabled in step 4).
6	Configure the edge (rising or falling) for SYNC Edge signal detection (if enabled in step 4).