Lenze TCF Series Manual do Utilizador descarregar pdf (Página 71)

B.4 ASSERTION LEVEL AND THE EPM

The TCF drive will store the setting of Parameter 79 - INPUT ASSERTION LEVEL on the

EPM (like it does with all of the other parameters), but it will also store this information

internally as a safeguard against the assertion level being changed accidentally by swapping

EPMs.

The P79 setting stored on the EPM must match the internally stored setting or the drive will

trip into an "A1" fault and will not operate. Therefore, if an EPM with a different P79 setting

is installed in a drive, the display will show the "A1" fault and the drive will not operate. The

only exception to this is if the EPM was just programmed using the EPM Programmer, and

it was being installed in a drive for the ﬁrst time. In this case, the drive's internal assertion

level setting will change to match the EPM, as described in NOTE 1 in section B.3.2, and no

fault would occur.

WARNING!

Changing the assertion level of the digital inputs without reconﬁguring

the control wiring can cause the motor to start unexpectedly, resulting in

equipment damage and/or injury to personnel! Be sure the control wiring is

correct for the selected assertion level.

An "A1" fault can be cleared by one of the following methods:

1. Perform a factory reset of the drive using Parameter 48 - PROGRAM

SELECTION. This will change the assertion level setting in the EPM to match

the internally stored setting.

2. Power down the drive and install an EPM that has the same assertion level

setting as the internal setting.

3. Power down the drive and install an EPM that has just been programmed with

the EPM Programmer.

4. Change P79 to match the assertion level on the EPM. If the assertion level is

active-low, and needs to be set back to active-high, please contact Lenze-AC

Tech.

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Lenze TCF Series Manual do Utilizador Página 71