Watson-Marlow MM420 - Manual (Page 80)

3 Functions Issue 10/06
MICROMASTER 420 Operating Instructions
80 6SE6400-5AA00-0BP0
3.5.5.12 Reference/limit frequencies
P1080 =... Min. frequency (entered in Hz)
Sets minimum motor frequency [Hz] at which motor will run irrespective of frequency
setpoint. If the setpoint falls below the value of P1080, then the output frequency is set to
P1080 taking into account the sign.
P1082 =... Max. frequency (entered in Hz)
Sets maximum motor frequency [Hz] at which motor will run irrespective of the frequency
setpoint. If the setpoint exceeds the value P1082, then the output frequency is limited. The
value set here is valid for both clockwise and anticlockwise rotation.
P2000 =... Reference frequency (entered in Hz)
The reference frequency in Hertz corresponds to a value of 100 %. This setting should be
changed if a maximum frequency of higher than 50 Hz is required. It is automatically
changed to 60 Hz if the standard 60 Hz frequency was selected using the DIP50/60 switch
or P0100.
NOTE
This reference frequency effects the setpoint frequency as both the analog setpoints
(100 % P2000) as well as the frequency setpoints via USS (4000H P2000) refer to this
value.
3.5.5.13 Motor control
P1300 =... Control mode
The control type is selected using this parameter. For the "V/f characteristic" control type,
the ratio between the frequency inverter output voltage and the frequency inverter output
frequency is defined.
0 V/f with linear
1 V/f with FCC
2 V/f with parabolic characteristic
3 V/f with programmable characteristic (
→ P1320 – P1325)
P1310 =... Continuous boost (entered in %)
Voltage boost as a % relative to P0305 (rated motor current) and P0350 (stator resistance).
P1310 is valid for all V/f versions (refer to P1300). At low output frequencies, the effective
resistance values of the winding can no longer be neglected in order to maintain the motor
flux.
f
Linear V/f
OFF
ON
t
t
⏐f⏐
P1310 active
t 0
1
Validity range
Vmax
Vn
(P0304)
V
ConBoost,100
0 fn
(P0310)
f max
(P1082)
V
f
Boost,end
(P1316)
Boost
Ou
tpu
t v
olt
ag
e
actual V
No
rm
al
V/
f
(P
13
00
=
0
)
V
ConBoost,50
Boost voltage
0.00 Hz
50.00 Hz
50.00 Hz
0
50.00 %