Siemens SINAMICS DCM Operating Instructions Manual page 435

Control sequence when specifying "Direction of rotation using field reversal":
1. Drive rotates in direction of rotation 1 (or is at a standstill)
2. Specify "Direction of rotation reversal using field reversal" by changing the logical state of
3. Field reversal is executed
4. Drive brakes and then rotates in direction of rotation 2 (or is at a standstill)
SINAMICS DCM Control Module
Operating Instructions, 06.2010, C98130-A7067-A1-02-7619
the connector input selected using p50580
Precondition: No braking was initiated using the button function "Braking using field
reversal"
– Wait until armature current I
in operating state ≥ o1.4)
– Inhibit field firing pulses (r52268=0 also initiates this)
– Wait until I (r52265) < I
field
– Wait time according to p50092[00] (0.0 to 10.0 s, factory setting 3.0 s)
– Open actual field contactor (r53195.0 = 0 or r53195[1] = 0)
– Wait time according to p50092[01] (0.0 to 10.0 s, factory setting 0.2 s)
– Control new field contactor (r53195.1 = 1 or r53195[0] = 1)
– Reverse the speed actual value (with the exception, for p50083 = 3 ... EMF as speed
actual value)
– Wait time according to p50092[02] (0.0 to 10.0 s, factory setting 0.1 s)
– Enable field firing pulses
– Wait until I (r52265) > I
field
– Wait time according to p50092[03] (0.0 to 10.0 s, factory setting 3.0 s)
– Enable armature firing pulses (operating state o1.4 can be exited)
Note
In the case of an internal speed actual value reversal as a result of field reversal, p50083
is supplied with inverted signal values (exception: p50083 = 3, see the SINAMICS DCM
List Manual, function diagram 6810).
When using the ramp-function generator it is recommended to parameterize p50228 = 0
(no speed controller setpoint filtering). If this is not done, then initial braking can occur at
the current limit as a result of the speed actual value reversal and setting the ramp-
function generator output to the (reversed) speed actual value or to the value according
to p50639 in operating state o1.4.
= 0 , then armature pulse inhibit (the drive then remains
A
(p50394)
field min
(r52268)*p50398
field set
Descriptions of functions
10.24 Field reversal
435