Siemens SIMOVERT MASTERDRIVES Manual page 781

05.2006
Defining the
machine data for
homing [821]:
U501.07=2000 ; MD7: Home position approach velocity = 1/5
; of maximum velocity = MD23/5 =
; 2000 [x 1000 LU/min], equals 556 min
; motor shaft
U501.06=250 ; MD6: Home position reducing velocity = 1/40
; of maximum velocity = MD23/40 =
; 250 [x 1000 LU/min], equals 69 min
; motor shaft
U501.03=0 (WE); MD3: Home position coordinate = 0, i.e. MD3 can
; remain at the factory setting.
U501.04=3440 ; MD4: Home position offset = 3440 LU
U501.05=1 (WE); MD5: Home position approach direction "to right
; of BERO" (N.B.: this value must also
; be entered in P183 [330]; see Chapter 4
U536.4=16 (WE) ; Connect BERO signal from digital input
U501.45=7000
Transferring
machine data [804]:
U502=2
Siemens AG 6SE7087-6QX70 (Version AG)
SIMOVERT MASTERDRIVES
The home position is to be approached at 1/5 of the maximum velocity
(MD23/5). When the axis moves away from the proximity switch area
(falling edge of rough pulse), the velocity is to be reduced to 1/40 of the
maximum velocity. Machine data MD7 and MD6 should be set as
follows:
Note <3> on [821.1] must be observed for the alignment of the home
position rough pulse for a unique assignment of the resolver zero
crossing to the rough pulse. In our application example, we will assume
that the home position is located to the right of the current position, i.e.
in the direction of increasing positional values, at the start of the homing
procedure. We will also assume that the machine zero, to which all
position setpoints refer, is located at an offset distance of +3440 LU
(equals 344°), as defined in MD4, from the zero crossing. This results
in the following machine data:
The rough pulse proximity switch is connected to digital input terminal
X101.6. This signal is already connected to the position sensing system
via P178 (see Chapter 3). Machine data MD45 must also be used to
connect the rough pulse to the technology [90] ==> [813.4] ==> [821.2]:
; terminal 6 to "digital input I4 for positioning"
; MD45: I4 acts as
; "BERO for home position"
The transfer and activation of the machine data is performed by
switching the drive on/off or by setting the following parameters (only
possible when the drive is stationary).
; Transfer and activate machine data. If
; machine data transferred without error, U502
; is automatically reset to "0".
Compendium Motion Control
Technology Option F01
-1
on the
-1
on the
[804.2]
9-133