NORD Drivesystems BU0020 - Manual (Page 91)

9 Telegram examples
BU 0020 GB-2612 91
9. Telegram examples
Various example telegrams are shown below to clarify the control and parameterisation of the
frequency inverter with the bus system.
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9.1 Switch-on block  Standby
A frequency inverter is to be switched from the "Switch-on disabled" status (STW Bit 0 – 0), which is
active when the device is switched on, to the "Standby" status (STW Bit 0 = 1). Parameter set 1 is
valid. Only the PZD channel is evaluated.
Procedure:
• Check last status word (ZSW 0B 70)
• Generate control word (STW 04 7E)
• Check response telegram (ZSW 0B 31)
Details:
• Status word of frequency inverter  frequency inverter is in switch-on block status
Word 5 6
Byte 8 9 10 11
Designation ZSW IW1
Value 0B 70 00 00
Bit Value Value
HEX
Meaning
15 0 0 Parameter set Bit 1 off
14 0 Parameter set Bit 0 off
13 0 Reserved
12 0 Rotation left is off
11 1 B Rotation right is on
10 0 Reference value undershot
9 1 Bus controller
8 1 Setpoint = actual value
7 0 7 No warning
6 1 Starting disabled
5 1 No emergency stop
4 1 Voltage not disabled
3 0 0 No fault
2 0 Operation disabled
1 0 Not ready for operation
0 0 Not on standby
Abbreviations used
PKW Parameter identifier
value
PZD Process data
PKE Parameter identifier
IND Index
PWE Parameter value
STW Control word 1
ZSW Status word1
SW1..3 Setpoint
IW1..3 Actual value