Operation Enable (Enable) - Control Word Bit 3 - Siemens SINAMICS DCM Operating Instructions Manual
Control module for variable-speed dc drives
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- Manual (705 pages)
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Descriptions of functions
10.7 Switch on, switch off, enable
● An internal interlock becomes active once n < nmin (r50370, r50371) for the first time.
● To ensure that "fast stopping" functions even when rewiring is carried out, current or
10.7.4
Operation enable (enable) - control word bit 3
The enable signal is HIGH active (log. "1" state = enable).
Control word bit 3 and terminal X177.13 (enable) are logically ANDed. See also function
diagram 2580.
Procedure for applying operation enable (if a switch-on command is present):
1. With positive brake-release time (p50087):
2. The ramp-function generator, n controller, and I controller are enabled.
3. Operating state o0 is reached.
4. Once a negative brake-release time (p50087) has elapsed, the "Release holding or
Procedure for withdrawing operation enable:
1. The ramp-function generator, n controller, and I controller are disabled.
2. Reduction in armature current
3. The armature firing pulses are disabled.
4. The "Close operational brake" signal is output (r53210.0 = 1, where p50080 = 2).
5. Operating state o1.0 or higher is reached.
6. The drive coasts down (or is decelerated by the operational brake).
7. Once n < nmin (p50370, p50371), the "Close holding brake" signal is output (r53210.0 =
372
This stops the drive from attempting to decelerate again if the motor is rotated by external
influences; the n < nmin message then disappears.
torque lower limits are specified, or additional setpoints are supplied, certain functions are
disabled automatically when "fast stopping" is applied.
– All torque limits are disabled while braking to n < nmin.
– Of the current limits, only the system current limit (p50171 and p50172), speed-
dependent current limit, and current limit resulting from I2t monitoring of the power unit
are enabled.
The "Release holding or operational brake" signal (r53210.0 = 0) is output and p50087 is
awaited in operating state o1.0.
With negative brake-opening time (p50087 negative):
Go immediately to step 2; brake is still closed (r53210.0 = 1)
operational brake" (r53210.0 = 0) signal is output.
1, where p50080 = 1).
SINAMICS DCM Control Module
Operating Instructions, 06.2010, C98130-A7067-A1-02-7619
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