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NORD Drivesystems BU0570 User Manual

Page 19

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4 Communication

BU 0570 GB-0312

Subject to technical amendments

19

4.2.2

Control word

Bit

Value

Meaning

Remarks

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With the switch from 0 to 1, errors which are no longer active are acknowledged.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 2xxE and SK 5xxE. 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 2xxE and SK 5xxE. 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 (setting: interface), this Bit must

be set so that the setpoint transferred is valid.

11 0

1 Rotational direction:

right

Rotation right (priority) is on.

12 0

1 Rotational direction:

left

Rotation left is 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

Table 13 Meaning of individual control word bits