Telegram examples, 1 switch-on block ( standby, Procedure – NORD Drivesystems BU0020 User Manual
Page 91: Details, Switch-on block standby, 9 telegram examples, 1 switch-on block standby
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