Manual

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.