2 rj12 diagnostic socket – NORD Drivesystems BU0260 User Manual

Page 34

Supplementary Manual CANopen for NORDAC SK 20E

Subject to technical amendments

BU 0260 GB

3.2 RJ12 Diagnostic socket

All participants which are coupled via a common system bus (field bus module / frequency inverter (up to 4
devices)) can be read out and edited/parameterised via an RJ12 diagnostic socket. This can be either the
diagnostic socket of the frequency inverter or that of the BUS connection units. This provides users with a
convenient facility to perform diagnosis and parameterisation from a central point, without having to access the
particular frequency inverter at its location.
Although the customer unit SK CU4-CAO does not have an RJ12 connection, it can be accessed from any
other subscriber (frequency inverter) on the same system bus.

Terminal/
Designation

Function

Data

Description / wiring suggestion

Parameter

Diagnostic access / RJ12, RS485/RS232

1 RS485

Data cable RS485

Baud rate
9600…38400Baud
Termination
resistor R=120



to be set by customer at
the final subscriber.

RJ12: Pin No. 1 … 6

1: RS485_A
2: RS485_B
3: GND
4: RS232_TxD
5: RS232_RxD
6: +24V

P502
...P513

2 RS485

3 GND

Reference potential
for BUS signals

0V digital

4 232

TXD

Data cable RS232

Baud rate
9600…38400Baud

5 232

RXD

6 +24V

24V voltage supply
from FI

24V

 20%

The bus speed of the diagnostic interface is 38400 baud. Communication is carried out according to the USS
protocol.

NOTE

Simultaneous use of several diagnostic sockets with several diagnostic tools may lead to
errors during communication. Therefore, only one diagnostic socket within a system bus
network should be used.

The ParameterBox SK PAR-3H is available as a diagnostic tool.
The necessary connecting cables are included in the scope of
delivery of the ParameterBox. For a detailed description of use,
please refer to Manual BU0040.

ParameterBox SK PAR-3H