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Commissioning Variable speed drive ATV31 – Using the preset speeds

Schneider variable speed drives are preconfigured in pre-selected speeds. We will not detail this part, just a simple example to use:

Description

Whatever speed is chosen, the Run Direction Forward command LI1 or the Run Reverse command LI2 must be activated.

Wiring

• Bridge the LI1 terminal with the + 24V terminal to start forward at the setpoint speed of the potentiometer or at a preselected speed if one of them is selected.

• Bridge the LI2 terminal with the + 24V terminal to start in reverse at the setpoint speed of the potentiometer or at a preset speed if one of them is selected.

• LI3 will be bridged with + 24V to have the slow speed of 5 Hz,

• LI4 will be bridged with + 24V to have the average speed of 45 Hz

• LI3 and LI4 will be bridged with + 24V to have the speed of 50 Hz

• Use a potentiometer with a maximum value of 10 kohms, the reference SZ1RV1202 is the Schneider potentiometer standard: value 2.2 kohms.

Connect the potentiometer as follows: full resistance between terminals + 10 and COM and the midpoint of the potentiometer on terminal AI1.

Setting

Check whether the following factory settings are still observed:

Menu SET => LSP = 0 HSP = 50

Menu FUN PSS PS2 = LI3

Menu FUN PSS PS4 = LI4

Force the following settings:

Menu FUN PSS SP2 = 5 Hz

Menu FUN PSS SP3 = 45 Hz

Menu FUN PSS SP4 = 50 Hz

Operation

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