The Multi-Step function allows the user to switch between up to 17 preset frequency references during run (including the Jog reference) through the digital input terminals (H1-0x parameters). The drive uses the acceleration and deceleration times that have been selected when switching between each frequency reference. An example for this function would be using a multi-position switch to select between preset speeds (frequency references). 

Note:

• Not all parameter and functions will be available in all drive models.
• The Jog frequency overrides all other frequency references and must be selected by a separate digital input.
• The multi-speed references 1, 2, and 3 can be provided by analog inputs.

To use the Multi-Step function, set the digital input H1-0x parameters to 3, 4, 5, and/or 32 (see table below). To assign the Jog reference to a digital input, set H1-0x = 6. Then, program the Frequency References (d1-01 thru d1-17) accordingly. 

Digital Input Setting	Function
H1-0x = 3	Mult-Step Reference 1
H1-0x = 4	Mult-Step Reference 2
H1-0x = 5	Mult-Step Reference 3
H1-0x = 32	Mult-Step Reference 4
H1-0x = 6	Jog Reference

Use the table below to deternine which frequency reference the drive will look at when using the Multi-Step function.

Digital Inputs
Multi-Step Inputs				Jog Input	Frequency Reference
H1-0x = 3	H1-0x = 4	H1-0x = 5	H1-0x = 32	H1-0x = 6	b1-01 = 0 (keypad)	b1-01 = 1 (analog input)	Name
Open	Open	Open	Open	Open	d1-01	Analog input (H3-xx = 0) <1>	Frequency Reference 1
Closed	Open	Open	Open	Open	Analog input (H3-xx = 2) or d1-02 <2>		Frequency Reference 2
Open	Closed	Open	Open	Open	Analog input (H3-xx = 3) or d1-03 <3>		Frequency Reference 3
Closed	Closed	Open	Open	Open	d1-04		Frequency Reference 4
Open	Open	Closed	Open	Open	d1-05		Frequency Reference 5
Closed	Open	Closed	Open	Open	d1-06		Frequency Reference 6
Open	Closed	Closed	Open	Open	d1-07		Frequency Reference 7
Closed	Closed	Closed	Open	Open	d1-08		Frequency Reference 8
Open	Open	Open	Closed	Open	d1-09		Frequency Reference 9
Closed	Open	Open	Closed	Open	d1-10		Frequency Reference 10
Open	Closed	Open	Closed	Open	d1-11		Frequency Reference 11
Closed	Closed	Open	Closed	Open	d1-12		Frequency Reference 12
Open	Open	Closed	Closed	Open	d1-13		Frequency Reference 13
Closed	Open	Closed	Closed	Open	d1-14		Frequency Reference 14
Open	Closed	Closed	Closed	Open	d1-15		Frequency Reference 15
Closed	Closed	Closed	Closed	Open	d1-16		Frequency Reference 16
N/A	N/A	N/A	N/A	Closed	d1-17		Jog Reference

Note:

• <1> Analog inputs are programmed with parameters H3-02 (A1), H3-06 (A3), and H3-10 (A2).
• <2> Analog inputs programmed for "2" Aux Frequency Reference 1 takes priority over d1-02 (Frequency Reference 2). If no analog inputs are set for "2", then d1-02 will be the frequency reference.
• <3> Analog inputs programmed for "3" Aux Frequency Reference 2 takes priority over d1-03 (Frequency Reference 3). If no analog inputs are set for "3", then d1-03 will be the frequency reference.
• Monitor U1-10 can be used as a troubleshooting tool to see which digital inputs are active. Refer to document: Testing Digital Input Signals in Sinking Mode.

The frequency reference timing diagram below displays how the drive can use the different frequency references to run at different preset speeds.

Example

An example of utilizing the Multi-Step function is to have a 3-position switch for 3 different preset speeds. In this situation, no analog input is present and the frequency reference (speed) is determined by which digital input is active (closed). Programming will include the following:

• b1-01 = 0 (Frequency Reference = Digital Operator)
• d1-02 = Speed 1 (Frequency Reference 2)
• d1-03 = Speed 2 (Frequency Reference 3)
• d1-05 = Speed 3 (Frequency Reference 5)
• H1-05 = 3 (Terminal S5 = Multi-Step Input 1) - Default
• H1-06 = 4 (Terminal S6 = Multi-Step Input 2) - Default
• H1-07 = 5 (Terminal S7 = Multi-Step Input 3)

Note: If the switch contacts are open at any point, parameter d1-01 (Frequency Reference 1) will become the frequency reference (speed). 

Digital Inputs
Multi-Step Inputs			Frequency Reference
H1-05 = 3	H1-06 = 4	H1-07 = 5	b1-01 = 0 (keypad)	Name
Open	Open	Open	d1-01	Frequency Reference 1
Closed	Open	Open	d1-02	Frequency Reference 2
Open	Closed	Open	d1-03	Frequency Reference 3
Closed	Closed	Open	d1-04	Frequency Reference 4
Open	Open	Closed	d1-05	Frequency Reference 5