Johnson Controls VFD67 Series Getting Started Manual page 34

No Function
32 Dynamic V to f select
OFF:Fixed linear voltage to frequency ratio (constant torque - standard load)
On: Voltage to frequency ratio dependant on load current (dynamic/variable torque/
load). This gives a higher motor efficiency.
No Function
33 Catch a spinning motor select
0: Disabled
1: Detect positive and negative frequencies
2: Detect positive frequencies only
3: Detect negative frequencies only
If the drive is to be configured in fixed boost mode (Pr 41 = Fd or SrE) with catch a
spinning motor software enabled, an autotune (see Pr 38 on page 35) must be carried
out to measure the motor's stator resistance beforehand. If a stator resistance is not
measured, the drive may trip on OV or OI.AC while trying to catch a spinning motor.
No Function
34 Terminal B7 mode select
dig: Digital input
th: Motor thermistor input, connect as per diagram below
Fr: Frequency input.
Fr.hr: High resolution frequency input.
Figure 6-11
Trip resistance: 3kΩ
Reset resistance: 1k8
If Pr 34 is set to th so that terminal B7 is used as a motor thermistor, the functionality of
NOTE
terminal B7 as set-up with Pr 05, drive configuration, will be disabled.
When setting to th, press mode four times. Analog reference 2 will no longer be selected
as the speed reference. Analog reference 1 should be used.
No Function
35 Digital output control (terminal B3)
n=0: At zero speed
At.SP: At speed
Lo.SP: At minimum speed
hEAL: Drive ok
Act: Drive active
ALAr: General drive alarm
I.Lt: Current limit active
At.Ld: At 100% load
USEr: User programmable
This parameter is automatically changed by the setting of Pr 12. When Pr 12
NOTE
automatically controls the setting of this parameter, this parameter cannot be changed.
A change to Pr 35 is set by pressing the
NOTE
34
dig, th, Fr, Fr.hr
T1 0V
Motor thermistor
B7
input
n=0, At.SP, Lo.SP, hEAL,
Act, ALAr, I.Lt, At.Ld, USEr
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Range
OFF or On
Range
0 to 3
Range
Range
MODE key on exit from parameter edit mode.
M
VFD67 Size A to D Getting Started Guide
Defaults Type
OFF RW
Defaults Type
0 RW
Defaults Type
dig RW
Defaults Type
n=0 RW
Issue Number: 1