C.1 Reaction Times With Im 308-C As Dp Master - Siemens SIMATIC S5 Manual

Reaction times in the ET 200 distributed
I/O system
IM 308-C as DP
master
S5-95U as DP
master
In this chapter
Basis
Goal
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
If you use IM 308-C master interfaces and want information on reaction
times, read Section C.1. The information there is a summary of the reaction
times and you will also find out how to determine the reaction times.
If you use S5-95U as DP masters and want information on reaction times,
read Section C.2. The information there is a summary of the reaction times
and you will also find out how to determine the reaction times.
This chapter contains information on the following:
Section
C.1 Reaction times with IM 308-C as DP master
C.2 Reaction times with S5-95U as DP master
C.3 Reaction time t
C.4 Reaction time t
slave
C.5 Example illustrating how to calculate
reaction times for the ET 200 distributed I/O system
C.6 Special cases which may prolong reaction time t
The information in this section is based on the "PROFIBUS-DP" bus profile.
The computations of reaction times do not take delays such as those caused
by diagnostics telegrams into account.
After reading this chapter, you will be familiar with the reaction times and
mechanisms of the ET 200 distributed I/O system.
You will also be in a position to dimension time-critical bus segments.
Topic
DP
C
Page
C-2
C-5
C-8
C-9
C-11
C-20
R
C-1