10–2
10–3
EWA 4NEB 812 6096–02b
EWA 4NEB 812 6096–02b
ET 200 Handheld
ET 200 Handheld
10.1 Tips for users of the DP Standard
slave
The ET 200 handheld can evaluate a maximum of 32 bytes
of inputs and 32 bytes of outputs of the DP Standard slave.
The ET 200 handheld does not distinguish digital and ana-
log areas of the DP Standard slave.
All message frames are transferred in the HIGH–LOW for-
mat; when the ET 200 handheld displays one word, the bits
have the following values:
2
8
2
10
2
6
2
7
2
9
2
5
2
4
2
3
2
2
2
1
2
11
2
12
2
13
2
14
2
15
2
0
What is an identifier?
An identifier is assigned to each input/output area of a
DP Standard slave. The identifier contains the following
parameters:
S
Input and/or output area
S
Length of input/output area
S
Length unit for input/output area (byte or word).
What is a slot?
In this chapter, the various consecutive identifiers are refer-
red to as slots. If the ET 200 handheld, for example, indica-
tes that an output is on slot 0, this means identifier 0.
What is meant by consistency?
This chapter often deals with the term “consistency”. Data
are called consistent when they have matching contents.
The consistency displayed by the ET 200 handheld means
the consistency required by a specific slot.
The ET 200 handheld always transfers input and output
data together so that consistency is ensured for the entire
input/output area.
DP Standard Slave
DP Standard Slave
