2 switch-on block, Standby, Switch-on block standby – NORD Drivesystems BU0050 User Manual
Page 44
NORD USS and Modbus RTU Manual
44
Subject to technical amendments
BU 0050 GB-3111
1.6.2
Switch-on block
Standby
A frequency inverter with the USS address 0 is to be switched from the status "Switch-on disabled"
(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 and no parameter data is transfered.
Procedure:
Check last status word (ZSW 0A 70)
Set address (Address 00)
Generate control word (STW 04 7E)
Send telegram
Check response telegram (ZSW 0B 31)
Details:
The status word of frequency inverter
is in switch-on block status
Byte No.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Meaning
STX
LGE
ADR
PKE
PKE
IND
IND
PWE
PWE
ZSW
ZSW
IW1
IW1
BCC
Hexadecimal
02
0C
00
00
00
00
00
00
00
0B
70
00
00
75
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
Disable voltage
3
0
0
No fault
2
0
Operation disabled
1
0
Not ready for operation
0
0
Not on standby
To switch the frequency inverter to the standby status, the following telegram must be sent:
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
00
00
00
00
00
00
00
04
7E
00
00
74
Abbreviations used:
PKW
Parameter identifier Value
PZD
Process data
PKE
Parameter identifier
IND
Index
PWE
Parameter Value
STW
Control word 1
ZSW
Status word 1
SW1..3
Setpoint
IW1..3
Actual value