Siemens SIMODRIVE 611 universal Function Manual page 223

08.99
Control word The speed setpoint can be entered as follows:
NSOLL_A
S
NSOLL_B
S
(n–set mode)
Table 5-8 Speed setpoint via NSOLL_A or via NSOLL_B
NSOLL_B
NSOLL_A (nsoll–h)
Bit
24 23 16 15
2)
31
7 F F F F
:
4 0 0 0 0
:
0 0 0 0 0
F F F F F
:
C 0 0 0 0
:
8 0 0 0 0
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.
Speed normalization P0880 is used to define which speed is obtained for
(P0880) NSOLL_A = 4000
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 8 1 RPM
E Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
via NSOLL_A (nsoll–h)
via NSOLL_B (nsoll–h + nsoll–l)
1)
nsoll–l Decimal value for
3) 3)
8 7 0 nsoll–h
3) 3)
F F F +32 767
: :
0 0 0 +16 384
: :
0 0 0 0
F F F –1
: :
0 0 0 –16 384
: :
0 0 0 –32 768
or NSOLL_B = 4000 0000
Hex
n
Normalization value
(P0880)
5 Communications via PROFIBUS DP
5.6 Net data (PKW and PZD area)
––> lower resolution
––> higher resolution
Comment Comment
nsoll–h
+
nsoll–l
2 147 483 647 Highest value
: :
1 073 741 824 Positive normalization
value (P0880)
: :
0 nset = 0
–1 nset = –1
: :
–1 073 741 824 Negative normalization
value (P0880)
: :
–2 147 483 648 Lowest value
.
Hex
4000 NSOLL_A
hex
4000 0000 NSOLL_B
hex
4)
4)
5-223
5