Danfoss VLT FC 51 Series Programming Manual page 40

4. Parameter Descriptions
[17]
[18]
[19]
[20]
4
[21]
[22]
[23]
[26]
[27]
[28]
[29]
[32]
[34]
[60]
[61]
[62]
[63]
[64]
40
Preset ref bit 1 Same as preset ref bit 0 [16], see par. 3-10.
Preset ref bit 2 Same as preset ref bit 0 [16].
Freeze reference Freeze actual reference. The frozen reference is now the point
of enable/condition for Speed up and Speed down to be used.
If Speed up/down is used, speed change always follows ramp 2
(par. 3-51 and 3-52) in the range par. 3-02
ence
Freeze output Freeze the actual motor frequency (Hz). The frozen motor fre-
quency is now the point of enable/condition for Speed up and
Speed down to be used. If Speed up/down is used, the speed
change always follows ramp 2 in the range par. 4-12,
Speed Low Limit
Speed up Select Speed up and Speed down if digital control of the up/
down speed is desired (motor potentiometer). Activate this
function by selecting either Freeze reference or Freeze output.
When Speed up is activated for less than 400 ms. the resulting
reference will be increased by 0.1%. If Speed up is activated for
more than 400 ms. the resulting reference will ramp according
to ramp 2 in par. 3-51.
Speed down Same as Speed up [21].
Setup select bit 0 Set par. 0-10
Logic 0 = set-up 1, Logic 1 = Set-up 2.
Precise stop inverse Prolong the stop signal to give a precise stop independent of
scan time. The function is available for terminal 33 only.
Start, precise stop As [26], but including Start.
Catch up Select Catch up/Slow down to increase or reduce the resulting
reference value by the percentage set in par. 3-12.
Slow down Same as Catch up [28]
Pulse input (only ter- Select Pulse input when using a pulse sequence as either ref-
minal 33) erence or feedback. Scaling is done in par. group 5-5*.
Ramp bit 0 Logic 0 = Ramp1, see par. 3-4*.
Logic 1 = Ramp2, see par. 3-5*.
Counter A (up) Input for counter A.
Counter A (down) Input for counter A.
Reset counter A Input for reset of counter A.
Counter B (up) Input for counter B.
Counter B (down) Input for counter B.
MG.02.C2.02 - VLT
Maximum Reference
- par. 3-03
Motor Speed High Limit
- par. 4-14,
NB!
When freeze output is active, the frequency con-
verter cannot be stopped via a low
Stop the frequency converter via a terminal pro-
grammed for Coasting Inverse [2] or Coast and
reset, inverse [3].
Active set-up
to Multi set-up.
® is a registered Danfoss trademark
VLT Micro Drive FC 51
Minimum Refer-
.
Motor
.
Start
[8] signal.