Siemens SIMODRIVE 611 universal Function Manual page 565

01.99 08.02
! not 611ue !
Input format These parameters are used to define how many signal periods corres-
(P0895 pond to the distance to be traveled.
and
Example:
P0896)
Assumption:
The dimension system is set to linear, metric
––> 1 MSR = 0.001 mm
The axis should move through 10 mm with 2048 signal periods.
––> P0895 = 2 048
––> P0896 = 10 000 [MSR]
Terminating If the angular incremental encoder interface is operated as input, then
resistor the following applies:
––> Switch–in the terminating resistor via switch 1
––> Refer to Chapter 1.3.2
The position reference value, entered via the angular incremental enco-
Position reference
value display der interface, is displayed using this parameter.
(P0032)
S
S
It is not absolutely necessary that P0032 and P0020 are the same (e.g.
for an axis coupling).
Input limiting It is only guaranteed that the input signals are correctly identified and
frequencies and
processed via the angular incremental encoder interface, switched as
signal limits input if the following input limiting frequencies and signal limits are
maintained:
Table 6-58 Input limiting frequencies and signal limits
Input signal waveform
Quadrature signal (P0894 = 0)
Pulse/direction signal (P0894 = 1)
Forwards/backwards signal (P0894 = 2)
1) For clock–synchronous PROFIBUS operation, each time that clock synchronism is established, the
position controller clock is briefly and internally increased in the slave. This means, at this particular instant,
the signal frequency may not exceed half of the permissible input limiting frequency.
E Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
6.8 Angular incremental encoder interface (X461, X462)
P0032 ––> Pos. ref. value via the angular incr. enc. interf.
P0020 ––> Position reference value for the pos. controller
Input limiting frequency
Position controller clock
cycle (P1009)
1 ms
2.5 MHz 2 MHz
5 MHz 5 MHz
5 MHz 5 MHz
6 Description of the Functions
Signal limits
1)
2 ms 4 ms
1 MHz Edge clearance
w 100 ns
t t 100 ns
a a
Pulse width
4 MHz
t , t
high low high low
Set–up time Set–up time
4 MHz
w 20 ns
t
s
w 100 ns
6-565
6