8 device control, 1 important notes, Device control – Lenze 931K User Manual
Page 54: Important notes
Device control
Important notes
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Device control
8.1
Important notes
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Danger!
Uncontrolled motor movements can occur
If the power stage of the controller is inhibited, the motor coasts to stop
without braking.
Possible consequences:
ƒ
Injury to persons through uncontrolled machine movements.
Protective measures:
ƒ
Install a mechanical motor brake which is activated automatically when the
power stage is inhibited.
The controller is controlled via PROFIdrive by means of a data word (LOW byte and HIGH
byte):
ƒ
The master uses the control word 1 to control the essential function of the
controller.
– The assignment of the control word 1 corresponds to the PROFIdrive profile. Some
functions have manufacturer−specific definitions.
– The controller first accepts the parameter data and then evaluates the control
word 1. This ensures that the sequence of the positioning steps is correct.
– State changes triggered via the control word 1 first have to be confirmed via the
status word 1 before another command can be sent via the control word 1.
ƒ
The controller (slave) uses the status word 1 to signal its state to the master.
– The assignment of the status word 1 corresponds to the PROFIdrive profile. Some
functions have manufacturer−specific definitions.
– The status word 1 displays the different states of the controller.