Danfoss VLT Midi Drive FC 280 Programming Manual page 20

Control
Bit 13, voltage OK/voltage exceeded
When bit 13 = 0, the voltage limits of the frequency
converter are not exceeded.
When bit 13 = 1, the direct voltage in the DC link of the
frequency converter is too low or too high.
4 4
4.4.3 PROFIdrive State Transition Diagram
In the PROFIdrive control profile, the control bits:
•
0–3 perform the basic start-up/power-down functions.
•
4–15 perform application-oriented control.
Illustration 4.4 shows the basic state transition diagram where control bits 0–3 control the transitions, and the corresponding
status bit indicates the actual state. The black bullets indicate the priority of the control signals where fewer bullets indicate
lower priority, and more bullets indicate higher priority.
Coast Stop
STW bit 1=false
Illustration 4.4 PROFIdrive State Transition Diagram
18
PROFIBUS DP
S3: Switching ON inhibited
STW bit 6=true; 0, 1, 2=false
OFF
AND No Coast Stop
AND No Quick Stop
STW bit 0=false
AND bit 1=true
AND bit 2=true
S2: Ready For Switching ON
STW bit 0=true; 1, 2, 6=false
Coast Stop
ON
OR Quick Stop
STW bit 0=true
STW bit 1=false
OR bit 2=false
S3: Switched ON
STW bit 0, 1=true; 2, 6=false
Enable
Operation
STW bit 3=true
S4: Operation
STW bit 0, 1,2=true; 6=false
1st priority
2nd priority
3rd priority
Danfoss A/S © 05/2016 All rights reserved.
Bit 14, torque OK/torque exceeded
When bit 14 = 0, the motor torque is below the limit
selected in parameter 4-16 Torque Limit Motor Mode and
parameter 4-17 Torque Limit Generator Mode.
When bit 14 = 1, the limit selected in
parameter 4-16 Torque Limit Motor Mode or
parameter 4-17 Torque Limit Generator Mode is exceeded.
Bit 15, timer OK/timer exceeded
When bit 15 = 0, the timers for the motor thermal
protection and thermal frequency converter protection
have not exceeded 100%.
When bit 15 = 1, a timer has exceeded 100%.
Coast Stop
OR Quick Stop
STW bit 1=false
OR bit 2=false
Pulses
Disabled
OFF
STW bit 0=true
Disable
Operation
STW bit 0=true
STW bit 3=false
Coast Stop Pulses
STW bit 1=false
Disabled
S5: Switching
Quick Stop
OFF
STW bit 0, 1=true
bit 2, 6=false
Quick Stop
STW bit 2=false
Ramp Stop
ON
OFF Quick Stop
STW bit 0=false STW bit 2=false
MG07F102