Stw1 - Control Word (Ctrlw) - Siemens SIDOOR AT40 System Manual

6.11.2.1

STW1 - control word (CtrlW)

Control word -1 (STW1) is identical to the specification in the PROFIBUS profile "Variable-
speed drives".
Bits 0 to 10 correspond exactly to the specifications for the PROFIBUS profile "Variable-
speed drives". The use and non-use of specific bits is marked accordingly.
The table below describes the assignments of the bits in control word 1.
Table 6- 71
Bit
0
1
2
3
4
5
6
7
8
9
10
11 ... 15
The following overview describes the relevant bits in control word 1. See also Image 6-33
Sequential control state graph (Page 216).
Table 6- 72 Explanation of bits in STW1
Bit Description
0 ON / OFF1
Note: The positive edge is decisive here (0 → 1).
1 OFF2
(drive coasts down)
2 OFF3
(Rapid stop of the
drive)
3 Operation enable
(drive start)
7 Acknowledge fault
Note: The positive edge is decisive here (0 → 1).
AT40, ATD400V, ATD400K, ATD4xxW, ATD400S, ATE250S, ATD400T
System Manual, 06/2016, A2B00096162-AN
Control word 1 (STW1)
Description
ON / OFF 1 (0 → 1)
OFF2 (drive coasts down)
OFF3 (rapid stop of the drive)
Operation enable (drive start)
Reserved
Reserved
Reserved
Acknowledge fault (0 → 1)
Reserved
Reserved
Control by PLC
Reserved
Value Remarks
1 Switch drive ready for operation (master switched on and voltage ready)
0 Not ready for switching on (master switched off and voltage off)
Shutdown according to defined ramp → corresponds to stop
1 OFF2 command is canceled
Does not run down to standstill
0 Motor coasts down (runs down to standstill) → corresponds to deenergize
1 OFF3 commands are canceled
0 Motor stop
1 Execution of drive orders (evaluation of technology control words)
0 No execution of drive orders
1 Acknowledge fault
0 No significance
6.11 Structure of user data/process data
Controllers
205