Position Feedback; Overview - Siemens SIMATIC ET 200S Operating Instructions Manual

1Count5V/500kHz

3.8 Position feedback

3.8 Position feedback
3.8.1

Overview

Description
This mode encompasses a subset of the functionality of the continuous counting mode. It is
intended for isochrone mode and differs from continuous counting by a smaller T
Module
module as an input module only. In this case, however, the possible controls are no longer
synchronized with T
To execute this mode, you must assign parameters to the 1Count5V/500kHz.
Maximum Count Range
The high counting limit is +2147483647 (2
The low counting limit is –2147483648 (–2
Load value
You can specify a load value for the 1Count5V/500kHz.
This load value is either applied directly as the new count value (LOAD_VAL) or it is applied
as the new count value when the following events occur (LOAD_PREPARE):
• The counting operation is started by a SW gate or HW gate (if the counting operation is
• Synchronization
• Latch and retrigger
Gate Control
To control the 1Count5V/500kHz, you have to use the gate functions.
RESET States of the Following Values after Parameter Assignment
Table 3-21
194
and a T equal to zero. This T
min WA
but rather are executed in the T
o
continued, the load value is not applied).
RESET States
Value
Load value
Count value
Latch value
equal to zero makes it possible to operate the
WA
cycle before or after T
DP
– 1).
31
).
31
RESET state
Operating Instructions, 02/2007, A5E00124867-05
DP
.
i
0
0
0
Technological Functions