Siemens SIMATIC S7-200 - EM 277 Configuration Options

S7-200 Specifications
A-56
S7-200 Programmable Controller System Manual
A5E00066097-02
Table A-18 list the configurations that are supported by the EM 277 PROFIBUS-DP
module. The default configuration for the EM 277 module is two words of input and
two words of output.
Table A-18 EM 277 Configuration Options
Configuration Inputs to Master Outputs from Master Data Consistency
1 1 word 1 word
2 2 words 2 words
3 4 words 4 words
4 8 words 8 words
5 16 words 16 words
6 32 words 32 words
Word Consistency
7 8 words 2 words
Word Consistency
8 16 words 4 words
9 32 words 8 words
10 2 words 8 words
11 4 words 16 words
12 8 words 32 words
13 2 bytes 2 bytes
14 8 bytes 8 bytes
Byte Consistency
15 32 bytes 32 bytes
Byte Consistency
16 64 bytes 64 bytes
17 4 bytes 4 bytes
18 8 bytes 8 bytes
Buffer Consistency
19 12 bytes 12 bytes
B
u
ff
er
C
ons
i
stency
20
16 bytes 16 bytes
The location of the input and output buffers may be configured to be anywhere in
the V memory of the S7-200 CPU. The default address for the input and output
buffers is VB0. The location of the input and output buffers is part of the parameter
assignment information that the master writes to the S7-200 CPU. The master
must be configured to recognize its slaves and to write the required parameters
and I/O configuration to each of its slaves.
Use the following tools to configure the DP master:
• For SIMATIC S5 masters, use COM PROFIBUS Windows software
• For SIMATIC S7 masters, use STEP 7 programming software
• For SIMATIC 505 masters, use COM PROFIBUS and either TISOFT2 or
SoftShop
For detailed information about using these configuration and programming
software packages, refer to the manuals for these devices. For detailed information
about the PROFIBUS network and its components, refer to the ET 200 Distributed
I/O System Manual .