NORD Drivesystems BU2100 - Manual (Page 12)

EtherNet/IP Bus module – Supplementary manual options for NORD - Frequency Inverters
12 BU 2100 GB-2213
4.1.1 Control word (STW)
The control word (STW) is the first word transferred to the frequency inverter in the process data area
in an order telegram. For example, a control word "Ready for switch-on" corresponds to 047E
(hex)
. In
general the command "Standby" should be the first command which is transferred to the inverter.
Bit
Valu
e
Meaning Remarks
0 0 Not ready for operation Reverse with the brake ramp, with disconnection from supply at f=0Hz (OFF1)
1 Ready for operation Frequency inverter ready for operation
1 0 Disable voltage Cut off voltage; the inverter output voltage is switched off; the FI enters a state
where switching on is disabled. (OFF2)
1 Do not disable voltage Operating condition OFF 2 is cancelled
2 0 Emergency Stop active Quick stop with programmed quick stop time; with disconnection from supply at
f=0Hz; the FI switches to starting disabled condition (OFF3).
1 Emergency Stop not
active
Operating condition OFF 3 is cancelled
3 0 Disable operation Cut off voltage; the inverter output voltage is switched off; the FI enters a state
where switching on is enabled.
1 Enable operation The output voltage is enabled; ramp to the existing setpoint
4 0 Pulse not enabled Ramp generator is set to zero; no disconnection from supply at f=0Hz; FI remains
in the operation enabled state.
1 Enable pulses Enable ramp generator
5 0 Ramp not enabled The setpoint currently provided by the ramp generator is "frozen" (frequency is
maintained).
1 Enable ramp Enable setpoint on ramp generator
6 0 Setpoint not enabled Selected setpoint value is set to zero on the ramp generator.
1 Enable setpoint Selected ramp generator setpoint is activated.
7 0 No acknowledgement With the switch from 0 to 1, errors which are no longer active are acknowledged.
1 Acknowledge error
(01)
Note: If a digital input has been programmed for the "ack.fault" function, this bit
must not permanently be set to 1 via the bus (otherwise, flank evaluation would
be prevented).
8 0
1 Start function 480, 11 Bus bit 8 from the control word is set. Only for SK 2xxE and SK 5xxE. For further
details of the function please refer to parameter P480.
9 0
1 Start function 480, 12 Bus bit 9 from the control word is set. Only for SK 2xxE and SK 5xxE. For further
details of the function please refer to parameter P480.
10 0 Control data invalid The transmitted process data is invalid.
1 Control data valid Valid process data is transferred from the master.
Note: In order for the transmitted setpoint to be valid, this bit must also be set
(setting: interface), even if only setpoint values are transmitted via the bus.
11 0
1 Rotation right is on Rotational direction right (priority) ON*
12 0
1 Rotation left is on Rotational direction left ON*
13 0/1 Reserved Reserved
14 0/1 Parameter set Bit 0 ON 00 = Parameter set 1
01 = Parameter set 2 10 = Parameter set 3
11 = Parameter set 4
15 0/1 Parameter set Bit 1 ON
* If Bit 12=0, then "Direction of rotation right ON" applies
Table 3: Control word (STW)
4.1.2 Status word (ZSW)
In the inverter response telegram, in the area of the process data the status word (ZSW) is transferred
as the first word. The meaning of the individual bits deviate for some types of devices.