Nord Drivesystems SK 300E Series, Supplementary Manual

Page: 46 / 76

NORD USS and Modbus RTU Manual
46 Subject to technical amendments BU 0050 GB-3111
1.6.3
Enable with 50% setpoint
A frequency inverter with the USS address 10, which is in "Standby" status (Section 1.6.2) is to be enabled for
clockwise rotation with 50% setpoint. The last response telegram was received as follows in the controller.
Procedure:

Check last status word (ZSW 0A 31)

Set address (Address 0A)

Generate control word (STW 04 7F)

Generate setpoint (2000 hex)

Send telegram

Check response telegram (ZSW 0F 37)
Details:
Starting requirement (status word of frequency inverter)
0 1 2 3 4 5 6 7 8 9 10 11 12 13
STX LGE ADR PKE PKE IND IND PWE PWE ZSW ZSW IW1 IW1 BCC
02 0C 0A 00 00 00 00 00 00 0B 31 00 00 37
The following telegram must be sent to the inverter
0 1 2 3 4 5 6 7 8 9 10 11 12 13
STX LGE ADR PKE PKE IND IND PWE PWE STW STW SW1 SW1 BCC
02 0C
0A
00 00 00 00 00 00
04 7F 20 00
5F
The frequency inverter accelerates the motor in the ramp. When the inverter has reached the 50% setpoint, it
responds with the following telegram.
0 1 2 3 4 5 6 7 8 9 10 11 12 13
STX LGE ADR PKE PKE IND IND PWE PWE ZSW ZSW IW1 IW1 BCC
02 0C 0A 00 00 00 00 00 00 0F 37 20 00 1C
Note: The status of MFR 1 is indicated in Bit 10 of the response telegram. Depending on the
programmed function and status, the status word may differ.