5
5.6
Net data (PKW and PZD area)
5-223
Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
The speed setpoint can be entered as follows:
via NSOLL_A (nsoll–h)
––> lower resolution
via NSOLL_B (nsoll–h + nsoll–l)
––> higher resolution
Table 5-8
Speed setpoint via NSOLL_A or via NSOLL_B
NSOLL_B
NSOLL_A (nsoll–h)
nsoll–l
1)
Decimal value for
Comment
Bit
31
2)
24 23
16 15
8 7
3)
0
3)
nsoll–h
nsoll–h
+
nsoll–l
Comment
7
F
F
F
F
F
F
3)
F
3)
+32 767
2 147 483 647
Highest value
4)
:
:
:
:
:
4
0
0
0
0
0
0
0
+16 384
1 073 741 824
Positive normalization
value (P0880)
:
:
:
:
:
0
0
0
0
0
0
0
0
0
0
nset = 0
F
F
F
F
F
F
F
F
–1
–1
nset = –1
:
:
:
:
:
C
0
0
0
0
0
0
0
–16 384
–1 073 741 824
Negative normalization
value (P0880)
:
:
:
:
:
8
0
0
0
0
0
0
0
–32 768
–2 147 483 648
Lowest value
4)
1) The speed setpoint resolution is increased with nsoll–l.
The control word nsoll–l is only transferred for the PPO types PPO2, PPO4 and PPO5.
2) Sign bit: Bit = 0 ––> positive value, bit = 1 ––> negative value
3) The drive does not evaluate these values (low byte from nsoll–l)
4) The speed is limited by the lowest setting in P1401/P1405/P1146 or P1147.
P0880 is used to define which speed is obtained for
NSOLL_A = 4000
Hex
or NSOLL_B = 4000 0000
Hex
.
n
Normalization value
(P0880)
NSOLL_A
NSOLL_B
4000
hex
4000 0000
hex
Fig. 5-10 Normalization of speed
Example:
Assumptions: The speed setpoint is entered via nsoll–h and P0880 =
16384
––> resolution = 1, i.e. 1 digit
1 RPM
Control word
NSOLL_A
NSOLL_B
(n–set mode)
Speed normalization
(P0880)
5 Communications via PROFIBUS DP
08.99
