User Manual 08/2003 Edition

4
4 Communications via PROFIBUS DP 02.99 05.03
4.2 Process data (PZD area)
Control word
(STW)
n-set mode?
4-98
The master issues its commands to the slave using control word STW.
Table 4-6 Structure of the control word (STW) in the n-set mode
Open holding brake / close holding brake (from SW 1.4)
Reserved
Control requested/no control requested
Reserved
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reset the fault memory
Enable setpoint / inhibit setpoint
Ramp–function generator start/ramp–function generator stop
Ramp–function generator enable
Enable operation/inhibit operation
Note:
Operating condition/OFF 3
1 signal / 0 signal
Operating condition/OFF 2
ON/OFF 1
Note:
The signals designated in this way must have at least a ”1” signal in order to be able to
operate a motor.
Table 4-7 Description of the individual signals in the control word (STW) n-set mode
Bit Signal name Signal status, signal description
1 ON
Ready
0 ON/OFF 1 0 OFF 1
Shutdown, decelerating along the down ramp, power
disconnected, tracking operation.
1 Operating condition
Ready
1 Operating condition/OFF 2 0 OFF 2
The power is disconnected and the motor coasts down,
power–on inhibit
1 Operating condition
Ready
2 Operating condition/OFF 3 0 OFF 3
Deceleration along the current limit, power disconnected
from the motor, tracking operation, power–on inhibit
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SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition