Lenze TCF Series - Manual (Page 69)

B.3 PROCEDURE FOR CHANGING INPUTS FROM ACTIVE-HIGH TO ACTIVE-LOW
If it is necessary to change the assertion level from active-high to active-low, it can be done
via procedure 3 .1 'Using the Programming Buttons on the Drive' or 3 .2 'Using the EPM
Programmer' .
WARNING!
Changing the assertion level of the digital inputs without removing or
reconfiguring the control wiring can cause the motor to start unexpectedly,
resulting in equipment damage and/or injury to personnel! Be sure to remove
all control wiring from the drive's terminal strip prior to changing the asserion
level .
NOTE:
Once the following procedure is performed and the inputs are changed to
active-low, they cannot be changed back to active-high with this procedure .
DO NOT CHANGE THE ASSERTION LEVEL UNLESS YOU ARE SURE
IT IS NECESSARY FOR YOUR SYSTEM! If the procedure is performed by
mistake, and it is necessary to change the assertion level back to active-high,
please contact Lenze-AC Tech .
B.3.1 PROCEDURE #1 - USING THE PROGRAMMING BUTTONS ON THE DRIVE
1 . Remove all control wiring from the terminal strip of the drive .
2 . Enter the programming mode as normal and go to Parameter 79 - INPUT
ASSERTION LEVEL .
3 . Press Mode to display the present setting (should be "01" for active-high) .
4 . Press the s button . The display will flash "PAS" and then "00", indicating that
the special password must be entered first in order to change the setting .
5 . Use the s and t buttons to scroll to the password value indicated on the label
that covers the drive's control terminal strip, and press Mode .
6 . The setting of P79 should now indicate "02" for active-low .
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