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6. SYSTEM PARAMETERS
Parameter Function
Range
[Default]
Description / Notes
G85139-H1751-U529-D1
© Siemens plc 1999
4/8/99
60
P220
Frequency cut-off.
0 - 1
[0]
0 =
Normal operation.
1 =
Switch off inverter output at or below minimum frequency.
Note:
Active in all modes.
P321
·
Minimum analogue frequency for
analogue setpoint 2 (Hz)
0 - 650.00
[0.00]
Frequency corresponding to the lowest analogue input value, i.e.
0 V/0 mA or 2 V/4 mA, determined by P323 and the settings of the DIP selector
switches 4 and 5 (
see Section 4.1.2)
. This can be set to a higher value than
P322 to give an inverse relationship between analogue input and frequency
output
(see diagram in P322)
.
P322
·
Maximum analogue frequency for
analogue setpoint 2 (Hz)
0 - 650.00
[50.00]
Frequency corresponding to the highest analogue input value, i.e.
10 V or 20 mA, determined by P323 and the setting of the DIP selector
switches 4 and 5 (
see Section 4.1.2)
.. This can be set to a lower value than
P321 to give an inverse relationship between analogue input and frequency
output.
P323
·
Analogue input 2 type
0 - 2
[0]
Sets analogue input type for analogue input 2, in conjunction with the settings
of the DIP selector switches 4 and 5 (
see, Section 4.1.2)
:
0
= 0 V to 10 V/ 0 to 20 mA Unipolar input
1
= 2 V to 10 V/ 4 to 20 mA Unipolar input
2
= 2 V to 10 V/ 4 to 20 mA Unipolar input with controlled start /
stop when using analogue input control.
Note:
Setting P323 = 2 will not work unless the inverter is under full local
control (i.e. P910 = 0 or 4) and V
³
1 V or 2mA.
WARNING: The inverter will automatically start when voltage goes above
1V or 2mA. This equally applies to both analogue and digital
control (i.e. P006 = 0 or 1)
P356
Digital input 6 configuration
0 - 24
[6]
Control function selection, DIN 6
See P051 - P055 for description.
P386
Sensorless vector speed control loop
gain - proportional term
0.1 - 20.0
[1.0]
To optimise the dynamic performance of the vector control this parameter
should be incremented whilst the inverter is operating under typical conditions
until the first signs of speed instability occur. The setting should then be
reduced slightly (approx. 10%) until stability is restored. In general, the
optimum setting required will be proportional to the load inertia. If this setting is
too low or too high, rapid load changes may result in DC link overvoltage trips
(F001) and/or unstable vector control.
See section 5.3.3 for further information .
Note:
P386 = Load i motor shaft inertia
motor shaft inertia
P387
Sensorless vector speed control loop
gain - integral term
0.01- 10.0
[1.0]
P386 must be optimised before adjusting P387. Whilst operating the inverter
under typical conditions, increment this parameter until the first signs of speed
instability occur. The setting should then be reduced slightly (approx. 30%) until
stability is restored.
See section 5.3.3 for further information.
P700
P701
·
Specific to PROFIBUS-DP. See PROFIBUS Handbook for further
P702
details.
Access only possible with P099 = 1
f
V/ I
P322
P322
P321
P321