NORD Drivesystems BU0040 - Manual (Page 47)

3 ControlBoxes – SK POT1-1
BU 0040 GB-0113 Subject to technical alterations 47
The setpoint value from the Simple Setpoint Box is only processed as a master setpoint. However, as usual,
setpoints from other sources can be taken into account in the form of auxiliary setpoints (e.g. frequency addition).
ATTENTION The drive unit does not stop automatically
If the SK SSX-3A is disconnected from an enabled frequency inverter, the drive will continue to run. In order to
stop the drive, the SK SSX-3A must be reconnected to the frequency inverter.
The parameter (P513) "Telegram timeout" can be set in order to monitor communication.
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 one or both data cables (RS485)
The error E009 appears in the box display. The frequency inverter does not react and maintains its operating
condition. If the frequency inverter was started with the SK SSX-3A, it must also be stopped with the SK SSX-3A.
As an alternative, it is also possible to stop it with the SimpleBox (SK CSX-3x), NORD CON or the ParameterBox in
ControlBox mode.
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, the drive is stopped without an error
message.
If the data connection is restored, the SK SK SSX-3A starts a scan process and switches online again immediately
after this is completed. The error message is no longer displayed.
Loss of supply voltage
Except for the fact that the Simple Setpoint Box switches off without an error message, the box and the frequency
inverter behave identically with regard to the behaviour described above under "Disconnection of data cables".
3.1.3.2 Operating mode IO-C (Control mode via DI1/DO1 of the SK 2xxE)
In the operating mode IO-C, communication is via digital input "1" and digital output "1" of the frequency inverter.
Here, all the features provided by the SimpleBox SK CSX-3H/ -3E (Section 2.2) are also available.
Field of use
In this operating mode, the box can communicate with SK 2xxE series frequency inverters with firmware version V
1.3 or higher (see parameter (P707[-01])).
Functions
In this operating mode the functions

Parameterisation

Control

Display of operating values
are available without restriction and correspond to those of the SimpleBox SK CSX-3H/ -3E. For technical reasons,
the display and the key reaction times are somewhat increased.