Siemens SINAMICS S Manuel page 1116

PROFIdrive bit
<1>
p0480[n-1]
(0)0 Bit No. Control word for encoder n (n = 1, 2 or 3)
Selects the function to be activated (with bit value = 1)
Function for bit 7 = 0
Function No.
(search for reference mark)
0 1 Reference mark 1
1 2 Reference mark 2
2 3 Reference mark 3
3 4 Reference mark 4
Start/stop/read selected function
4
0 1 0 1
5 0 0 1 1
6 0 0 0 0
Mode of the function to be activated
7 1 = flying measurement
0 = Search for reference mark (zero mark or BERO)
8...12 Reserved part
1 = Request cyclic transfer of the absolute position value in
13 Gn_XIST2
(e.g. EQN absolute track; acknowledgment in Gn_ZSW bit 13)
14 1 = Request parking encoder (handshake with Gn_ZSW bit 14)
= acknowledge encoder fault (located in Gn_ZSW, bit 15;
15
Handshake with Gn_ZSW bit 11)
<3>
1 2
DO: SERVO, VECTOR
Encoder evaluation function - encoder interface, receive signals, encoders 1 ... 3
Enc Gn_STW
r0487[n-1]
Function for bit 7 = 1
(flying measurement)
Measuring probe 1
Measuring probe 1
Bits 0...13 control what is transferred
Measuring probe 2
in Gn_XIST 2.
There are 3 alternatives:
Measuring probe 2
- Bit 7 = 0: Position actual value at
- Bit 7 = 1: Position actual value when
- Bit 13 = 1:Cyclic absolute position
Interrupt function
Read generated value
Activate selected function
No function
<4>
3 4
<1>
To the position sensing, encoder n
[4704.3]
<1>
Index [n-1] --> encoder n
Index [0] --> encoder 1
Index [1] --> encoder 2
Index [2] --> encoder 3
The position actual values are read-out of Gn.XIST2 using a
<2>
handshaking technique. The following pulse diagram shows,
as example, reading-in the position at the reference mark 1
(Mode: Bit 7 = 0)
Select function 1 [Bit 3...0]
("search for reference mark 1")
the reference mark <2>
Start function [Bit 6...4]
Function active [Gn_ZSW Bit 0]
the measuring probe
edge is received <2>
Actual value save at the
reference mark
value from absolute
encoder
Read generated value [Bit 6...4]
Value from function 1 available
[Gn_ZSW Bit 4]
Position actual value at reference
mark 1 in Gn_XIST2
<3> The bits are processed with the following priority sequence (highest priority -->
lowest priority bit): Bit 14 --> Bit 15 --> Bit 4-7 --> Bit 12 --> Bit 13.
<4> Feedback signal is provided in Gn_ZSW bit 14 - however the encoder is not
actually parked.
5 6
fp_4720_01_eng.vsd
23.03.06 V02.04.00
PROFIBUS sampling time
Refer to [1020.7]
0001
000 000
001
000 010
7 8
Function diagram
- 4720 -
SINAMICS S