NORD Drivesystems BU0040 - Manual (Page 52)

NORDAC Control and Parameter Boxes
52 Subject to technical alterations BU 0040 GB-0113
function", the parameter (P400 [-07])must be parameterised to {02} "Frequency addition". In this configuration, the
analog signal is processed additively to the setpoint value of the SK SSX-3A.
Information
Display
The display on the SK SSX-3A does not provide any information about the actual speed of the drive. Only the
currently set setpoint value of the Simple Setpoint Box is displayed.
Parameterisation
The Simple Setpoint Box has its own parameters.
The parameters can only be accessed if the SK SSX-3A is in IO-S mode and is not currently sending an enable
signal.
As with the SimpleBox (see Section 2.2), the parameters are selected by pressing the VALUE keys or . By
confirming with the "OK" key, the actual setting becomes visible and can be changed with the VALUE keys. New
values are adopted and permanently stored in the SK SSX-3A by pressing the "OK" key again. With the keys or
the display returns to the initial display or one level backwards. Changes which have not been confirmed with
"OK" are not saved.
During parameterisation the two LEDs of the SK SSX-3A (P1 and P2) illuminate continuously.
Parameter Setting value / Description / Note
P050 Scaling factor
0.01 … 99.99
[ 1.00 ] With this parameter, the scaling of the SK SSX-3A display in IO-S mode can be changed. It is
therefore possible to display system-specific operating such as e.g. the throughput quantity.
The setting 1.00 corresponds to a displayed value from -100% to 100%.
Note: Only values which are sent by the SK SSX-3A are taken into account in the
display.
P051 Starting value
(-100 ... 100)x(P050)
[ 0.0 ]
Storage of the starting value.
The value set here is used as the starting value for the frequency inverter when it is enabled.
The starting value is not stored in the frequency inverter.
The starting value can also be written into the parameter from the currently set setpoint value of
the box by pressing the "OK" key.
The value range of the starting value depends on the scaling (P050).
From a starting value < - 999 (possible with scaling factors ≥ 10.00) the prefix is no longer
displayed.
Interruption of communication
An interruption of communication (disconnection of the plug, individual cables) has various effects on the frequency
inverter and the Simple Setpoint Box.
Disconnection of the setpoint value channel (Connection Terminal B1 (SK SSX-3A) to Terminal 21 (SK 2xxE))
The Simple Setpoint Box does not report an error and remains in operation. Setpoints and enabling can be
changed on it. On the other hand, the drive is stopped unless it is provided with an enable signal and a setpoint
value from another source.
The parameter (P513) "Telegram timeout" provides an optional monitoring of communication on the inverter side. If
the communication cannot be restored after interruption within the time set (max. 6 sec) the drive is stopped with
the error message E010 (10.0).
If the data connection is restored, the error must first be acknowledged (sequential pressing of the and
keys) in order to restart the drive.