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Siemens CSM 1277 User Manual

Siemens CSM 1277
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Programming made easy
6.1 Easy to design your user program
Easy Book
Manual, 03/2014, A5E02486774-AF
93
6.1.5
Creating reusable code blocks
Use the "Add new block"
dialog under "Program
blocks" in the Pr
oject
navigator to create OBs,
FBs, FCs, and global DBs.
When you create a code
block, you select the
programming language for
the block. You do not
select a language for a DB
because it only stores data.
Selecting the "Add new
and open" check box
(defaul
t) opens the code
block in the Project view.
You can store objects you want to reuse in libraries. For each project, there is a project
library that is connected to the project. In addition to the project library, you can create any
number of global libraries that can be used over several projects. Since the libraries are
compatible with each other, library elements can be copied and moved from one library to
another.
Libraries are used, for example, to create templates for blocks that you first paste into the
project library and then further develop there. Finally, you copy the blocks from the project
library to a global library. You make the global library available to other colleagues working
on your project. They use the blocks and further adapt them to their individual requirements,
where necessary.
For details about library operations, refer to the STEP 7 online Help library topics.

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Siemens CSM 1277 Specifications

General IconGeneral
Product type designationCSM 1277
Transfer rate10/100 Mbit/s
Supply voltage24 V DC
Operating temperature-40 to +70 °C
Mounting typeDIN rail mounting
TypeIndustrial Ethernet Switch
Safety Integrity LevelNot applicable
Input VoltageNot applicable
Output VoltageNot applicable
Protection ClassIP20
Number of ports4
ProtocolsEthernet
Power consumption3 W
Number of Inputs0
Number of Outputs0

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