NORD Drivesystems BU0550 - Manual (Page 12)

PLC logic for NORD SK 54xE frequency inverters
12 BU 0550 GB-0813
1.3 Scope of functions
The PLC supports a wide range or operators, functions and standard function modules, which are defined in
IEC1131-3. A detailed description can be found in the following sections (Sections 2.7 and 4)
Function blocks which are additionally supported are also explained (see Section 3.5 ).
1.3.1 Motion Control Lib
The Motion Control Lib is orientated to the PLCopen specification "Function blocks for motion control". This
mainly contains function blocks which are used to move the drive. In addition, function blocks for reading
and writing FI parameters are also provided.
1.3.2 Electronic gear with Flying Saw
The inverter is equipped with the functions electronic gear (synchronous operation in positioning mode) and
Flying Saw. Via these functions the inverter can follow another drive unit with angular synchronism. Also, via
the additional Flying Saw function it is possible to synchronize to the precise position of a moving drive. The
electronic gear mode can be started and terminated at any time. This enables a combination of conventional
position control with its move commands and gear unit functions.
For the gear function a NORD frequency inverter with internal CAN bus is required on the master axis.
1.3.3 Visualisation
Visualisation of the operating status and the parameterisation of the frequency inverter is possible with the
aid of a ControlBox or a ParameterBox.
Alternatively, the CANopen Master functionality of the PLC CAN bus panel can be used to display
information.
1.3.3.1 ControlBox
The simplest version for visualisation is the ControlBox. The 4-digit display and the keyboard status can be
accessed via two process values. This enables simple HMI applications to be implemented very quickly.
In order for the PLC to access the display, P001 must be set to "PLC-Ctrlbox Value". A further special
feature is that the parameter menu is no longer accessed via the arrow keys. Instead, the "On" and "Enter"
keys must be pressed simultaneously.
1.3.3.2 ParameterBox
In visualisation mode, each of the 80 characters in the P-Box display (4 rows of 20 characters) can be set
via the PLC. It is possible to transfer both numbers and texts. In addition. keyboard entries on the P-Box can
be processed by the PLC. This enable the implementation of more complex HMI functions (display of actual
values, change of window, transfer or setpoints etc.). Access to the P-Box display is via function blocks in
the PLC.
Visualisation is via the operating value display of the ParameterBox. The content of the operating value
display is set via the P-Box parameter P1003. This parameter can be found under the main menu item
"Display". P1003 must be set to the value "PLC display". After this, the operating value display can be
selected again by means of the right and left arrow keys. The display controlled by the PLC is then shown.
This setting remains in effect even after a further switch-on.