Lenze TCF Series User Manual

Page 57

P58

KEYPAD AND PROTECTION STATUS

This indicates the status of the buttons on the keypad and the status of the protective circuitry
in the drive, using the horizontal segments of the LED . An illuminated segment indicates that
the corresponding button is pressed, or the protective circuit is active . Refer to the following
diagram .

FAST

CURRENT

LIMIT

Mode

OUTPUT

FAULT

P59

TB-30 ANALOG OUTPUT

This displays the level of the analog output signal at TB-30 . A reading of 100% indicates that
the output is 10 VDC .
P73

HEATSINK TEMPERATURE

This displays the heatsink junction temperature in degrees C .
P79

INPUT ASSERTION LEVEL

The digital inputs (TB-1, 13A, 13B, 13C and 13D) are configured for active-high as standard,
but can be changed to active-low during initial set-up . If dry contacts (such as relays, switches,
push-buttons, etc) are to be used to activate the digital inputs, it should not be necessary to
change the assertion level .

If solid-state circuits are to be used to activate the digital inputs, it may be necessary to
change the assertion level depending on the type of circuit (PNP/sourcing or NPN/sinking) .
Refer to APPENDIX B - INPUT ASSERTION LEVEL for more information, and for the
procedure to change the digital inputs to active-low (changing this parameter requires a
special password) .

When set for HIGH (01), TB-4 is at +12 VDC and the digital inputs are activated when they
are at +10 VDC or higher (24 VDC max) relative to TB-4 .

When set for LOW (02), TB-4 is at 0 VDC and the digital inputs are activated when they are
at +2 VDC or lower relative to TB-4 .
P80

DRIVE MODE

This selects whether the drive will operate in V/Hz mode or vector mode:

01 CONSTANT V/Hz: Selects constant torque V/Hz mode . This setting is best for

general purpose industrial applications that do not require vector performance .

02 VARIABLE V/Hz: Selects variable torque V/Hz mode . This setting will achieve

maximum energy savings in variable torque applications such as centrifugal
fans and pumps .

03 ENHANCED CONSTANT V/Hz: Achieves maximum performance in V/Hz

mode . This setting is for applications that require high performance but cannot
use vector mode, such as multiple motor applications .