C.6.2 Et 200U Operating In Slow Mode - Siemens SIMATIC S5 Manual

C.6.2 ET 200U operating in slow mode
When does the If, for example, the IP 265 is inserted in the ET 200U, the ET 200U must
ET 200U operate in
operate in slow mode. The reaction time t
slow mode?
Worked example
This example refers to Section C.5. Let us assume that the ET 200U contains
an IP 265 instead of an 8DI.
t
I/Obus
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
Reaction times in the ET 200 distributed I/O system
is calculated as follows:
Reaction time constant
1
(Number of analog modules,
CPs, IPs)
9
("Number of bytes inserted")
0
(Number of empty slots)
is prolonged accordingly.
I/Obus
= 1.064 ms
0.014 ms = 0.014 ms
0.186 ms = 1.674 ms
0.087 ms =
t (slow mode) 2.75 ms
I/Obus
+
+
=
0 ms
=
C
C-25