NORDAC LINK (SK 250E-FDS ... SK 280E-FDS) – Users Manual for Frequency Inverters as Field Distributors
134
BU 0250 en-3021
Pos: 419 /Anleitungen/Elektronik/FU und Starter/5. Parameter/Parameterauflistung (P000 ...)/P500-P599/Parameter P505 – Absolute Minimalfrequenz @ 0\mod_1328091889383_388.docx @ 10996 @ @ 1
P505
Abs. minimum frequency
(Absolute minimum frequency)
S
P
0.0 ... 10.0 Hz
{ 2.0 }
Specifies the frequency value that cannot be undershot by the FI. If the setpoint is less than the
abs. minimum frequency, the FI switches off or switches to 0.0Hz.
At the absolute minimum frequency, braking control (P434) and the setpoint delay (P107) are
actuated. If a setting value of "Zero" is selected, the brake relay does not switch during reversing.
When controlling lift equipment without speed feedback, this value should be set to a minimum of
2Hz. From 2Hz, the current control of the FI operates and a connected motor can supply sufficient
torque.
NOTE:
Output frequencies of < 4.5 Hz lead to current limitation (chapter 8.4.3).
Pos: 420 /Anleitungen/Elektronik/FU und Starter/5. Parameter/Parameterauflistung (P000 ...)/P500-P599/Parameter P506 – Automatische Störungsquittierung @ 0\mod_1328091934274_388.docx @ 11019 @ @ 1
P506
Automatic error
acknowledgement
(Automatic error acknowledgement)
S
0 ... 7
{ 0 }
In addition to the manual error acknowledgement, an automatic one can also be selected.
0 =
No automatic
error acknowledgement.
1 ... 5 =
Number
of permissible automatic error acknowledgements within one mains-on cycle.
After mains off and switch on again, the full amount is again available.
6 =
Always:
an error message will always be acknowledged automatically if the cause of
the error is no longer present.
7 =
Via Deactivate enable:
acknowledgement is only possible using the OK / ENTER key
or by mains switch-off. No acknowledgement is implemented by removing the enable!
NOTE:
If (P428) is parameterised to "ON", parameter (P506) "Automatic error acknowledgement"
must not be parameterised to setting 6 "Always" as otherwise the device or system is endangered
due to the possibility of continuous restarting in the case of an active error (e.g. short-circuit to
earth / short circuit).
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P509
Control word source
(Control word source)
S
0 ... 5
{ 0 }
Selection of the interface via which the FI is controlled.
0 =
Control terminals
or
keybd. control,
"Control terminals or keyboard control"
**
with the
SimpleBox (if P510=0), the ParameterBox or via BUS I/O bits.
1 =
Only control terminals *
, the FI can only be controlled via the digital and analogue inputs
or via the bus I/O Bits.
2 =
USS*
, the control signals (enable, rotation direction, etc.) are transferred via the RS485
interface, and the setpoint is transferred via the analogue input or the fixed frequencies.
3 =
System bus *
, setting for control by master via a bus interface
4 =
System bus broadcast *
, setting for actuation by a master drive in Master / Slave mode
(e.g. with synchronous applications)
5 =
AS-i *
, Control via AS-Interface with CTT2 protocol (double slave)
*)
Keyboard control (SimpleBox, ParameterBox) is disabled, parameterisation is still
possible.
**) If communication is interrupted during keyboard control (timeout 0.5 sec), the FI will
block without an error message.
NOTE:
For details of the optional bus systems, please refer to the relevant supplementary bus manuals.
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Содержание NORDAC LINK SK250E-FDS
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