NORD Drivesystems BU0080 - Manual (Page 29)

6 Data transmission
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6.4.3 Control word (STW) .4.3 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)
.
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)
.
PZD1 PZD1 PZD2 PZD2 PZD3 PZD3 PZD4 PZD4
STW SW1 SW2/3 SW2/3
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit Value Significance Comments
0 0 OFF 1 Reverse with the brake ramp, with disconnection from supply at f=0Hz
1 ON Ready for operation
1 0 OFF 2 Cut off voltage; the inverter output voltage is switched off; the FI enters a state
where switching on is disabled.
1 Operating condition OFF 2 is cancelled
2 0 OFF 3 Quick stop with programmed quick stop time; with disconnection from supply at
f=0Hz; the FI switches to starting disabled condition.
1 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 Lock ramp generator Ramp generator is set to zero; no disconnection from supply at f=0Hz; FI
remains in the operation enabled state.
1 Operating condition Enable ramp generator
5 0 Stop ramp generator The setpoint currently provided by the ramp generator is "frozen" (frequency is
maintained).
1 Enable ramp generator Enable setpoint on ramp generator
6 0 Disable setpoint 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7 0 No acknowledgement With the switch from 0 to 1, errors which are no longer active are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 Note: When a digital input has been programmed for the "ack.fault" function,
this bit must not permanently be set to 1 via the bus (otherwise, edge
evaluation would be prevented).
8 0
1 Bit 8 active Bus bit 8 from the control word is set. (Only for SK 200E and SK 500E)
For further details of the function please refer to parameter (P480).
9 0
1 Bit 9 active Bus bit 9 from the control word is set. (Only for SK 200E and SK 500E)
For further details of the function please refer to parameter (P480).
10 0 PZD invalid The transmitted process data is invalid.
1 PZD valid Valid process data is transferred from the master.
Note:If setpoints only are transferred via the bus, this bit must be set so that
the transferred setpoint is valid.
11 0
1 Rotational direction: right Rotational direction right (priority) – ON*
12 0
1 Rotational direction: left Rotational direction left – ON*
13 0/1 Reserved
14 0/1 Bit 0 to switch parameter
set
15 0/1 Bit 1 to switch parameter
set
00 = Parameter set 1
01 = Parameter set 2 10 = Parameter set 3
11 = Parameter set 4
* If Bit 12=0, then "Direction of rotation right ON" applies