NORD Drivesystems BU0050 - Manual (Page 43)

1.6 USS – Telegram examples
BU 0050 GB-3111 Subject to technical amendments 43
1.6 Telegram examples
Various example telegrams are shown below to clarify the control and parameterisation of the frequency
inverter with the USS protocol.
Note: When transferring parameter orders, it must be taken into account that the slave does not
immediately respond to orders in the parameter channel of the master telegram, but a positive
response can be delayed by one or more communication cycles. The master must therefore repeat
the required order until the corresponding slave response is received.
The macro generator of the NORD CON control and parameterisation software is used as a programming aid.
The macro generator is started directly from the NORD CON program via the menu bar.
1.6.1 The Macro Generator
Simple process sequences can be simulated with the aid of the macro generator. This can used for instance,
for testing during commissioning. Parameterisation of the devices is also possible. The individual telegrams of
a macro are shown in hexadecimal format. This information can be used to create control programs based on
the USS protocol.
A macro can consist of several steps. The telegram wich is transferred to the inverter can be observed in the
Hex view in the overview. A sub-menu provides help for creating the individual steps.

USS address

Control word

Setpoint

Parameter number

Parameter index

Parameter value

Order
Together, all of these steps comprise a step in the macro The telegram structure in the Hex view of each
individual step is shown in the Macro window.