Operating instructions

4.4.3. Status Word according to PROFIdrive Profile (STW)
The Status word is used to notify a master
(e.g. a PC) about the status of a slave.
Bit
Bit = 0 Bit = 1
00 Control not
ready
Control ready
01 Drive not
ready
Drive ready
02 Coasting Enable
03 No error Trip
04 OFF 2 ON 2
05 OFF 3 ON 3
06 Start possible Start not possible
07 No warning Warning
08 Speed ≠ ref-
erence
Speed = reference
09 Local opera-
tion
Bus control
10 Out of fre-
quency limit
Frequency limit ok
11 No operation In operation
12 Drive OK Stopped, autostart
13 Voltage OK Voltage exceeded
14 Torque OK Torque exceeded
15 Timer OK Timer exceeded
Explanation of the Status Bits
Bit 00, Control not ready/ready
When bit 00 = "0", bit 00, 01 or 02 of the Control word is "0" (OFF 1, OFF 2 or OFF 3) - or the
frequency converter is switched off (trip).
When bit 00 = "1", the frequency converter control is ready, but there is not necessarily power
supply to the unit present (in the event of external 24 V supply of the control system).
Bit 01, VLT not ready/ready
Same significance as bit 00, however, there is a supply of the power unit. The frequency converter
is ready when it receives the necessary start signals.
Bit 02, Coasting/Enable
When bit 02 = "0", bit 00, 01 or 02 of the Control word is "0" (OFF 1, OFF 2 or OFF 3 or coasting)
- or the frequency converter is switched off (trip).
When bit 02 = "1", bit 00, 01 or 02 of the Control word is "1"; the frequency converter has not
tripped.
Bit 03, No error/Trip
When bit 03 = "0", no error condition of the frequency converter exists.
When bit 03 = "1", the frequency converter has tripped and requires a reset signal before it can
start.
Bit 04, ON 2/OFF 2
When bit 01 of the Control word is "0", then bit 04 = "0".
When bit 01 of the Control word is "1", then bit 04 = "1".
VLT
®
Profibus 4. How to Control the Frequency Converter
MG.33.C4.02 - VLT
®
is a registered Danfoss trademark 33
4