Siemens SINAMICS Series User Manual

Descriptions of functions
10.29 Field reversal
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
621
Control sequence when specifying "Direction of rotation using field reversal"
1. Drive rotates in direction of rotation 1 or 2 (or is at a standstill)
2. Specify "Direction of rotation reversal using field reversal" by changing the logical state of
the binector selected using p50580
3. Field reversal is executed
Precondition: No braking was initiated using the button function "Braking using field
reversal"
– Wait until armature current I
A
= 0 , then armature pulse inhibit (the drive then remains
in operating state ≥ o1.4)
– Inhibit field firing pulses (r52268=0 also initiates this)
– Wait until I
field
(r52265) < I
field min
(p50394)
– Wait time according to p50092[00] (0.0 to 10.0 s, factory setting 3.0 s)
– Open current 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 (r53195.0 = 1 or r53195.1 = 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
field
(r52265) > I
field set
(r52268)*p50398
– 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)
4. Drive brakes and then rotates in direction of rotation 1 or 2 (or is at a standstill)
Note
In the case of an internal speed actual value reversal as a result of field reversal, p50083 is
supplie
d 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.

Siemens SINAMICS Series Specifications

General

Product Line	SINAMICS
Cooling Method	Air-cooled, Liquid-cooled
Voltage Range	200 V to 690 V
Power Range	0.12kW - 250kW
Communication Interfaces	PROFINET, PROFIBUS, Ethernet
Control Modes	Vector control, V/f control
Protection Class	IP20
Type	Variable Frequency Drives (VFD)