NORD Drivesystems BU0070 - Manual (Page 33)

7 Example telegrams
BU 0070 GB Subject to technical alterations 33
7.2 Enable with 50% setpoint
A frequency inverter in the "Standby" status must 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)
• Generate control word (STW 04 7F)
• Check response telegram (ZSW 0F 37)
Details:
Starting requirement (status word of frequency inverter)
9 10 11 12
ZSW ZSW IW1 IW1
0B 31 00 00
The following telegram must be sent to the frequency inverter
9 10 11 12
STW STW SW1 SW1
04 7F 20 00
The frequency inverter accelerates the motor in the ramp. When the inverter reaches 50% setpoint, it responds
with the following telegram.
9 10 11 12
ZSW ZSW IW1 IW1
0F 37 20 00
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.