Siemens SIMATIC S5 Manual page 276

C.4 Reaction time t
Definition t
slave
Figure C-6 Reaction time t
Negligible ... t
slave
Important ...
t
slave
Table C-7
Configura-
tion of
DP slaves
t for The delay t
slave
IM 308-C/DP slave t
slave
t for S5-95U
t
slave slave
affects the S5-95U programmable controller with SINEC L2 DP interface is
described in detail in the system manual S5-90U/S5-95U Programmable
Controller, Chapter 6 ("Calculating the cycle and reaction times").
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
Reaction times in the ET 200 distributed I/O system
slave
is the reaction time within the DP slave.
t
slave
slave
is negligible for the DP slaves:
ET 200B (with low input/output delay) and
ET 200C (with low input/output delay).
is very important for the DP slaves:
ET 200U and
S5-95U with SINEC L2 DP interface
ET 200B and ET 200C with high input/output delay
Factors which favor reaction time t
Factor favoring a low reaction time t
Uniform distribution of inputs and outputs on a DP slave
All DP slaves of similar configuration; if necessary, divide the I/O
modules of an ET 200U to two ET 200Us
for the IM 308-C as DP slave (see Section C.1) is:
slave
= t + t
prog cons
is the reaction time in the DP slave. The way in which this reaction time
t
slave
slave
in ET 200U and S5-95U:
slave
C
C-9