Siemens SIMATIC CM35 Manual page 139

Glossary
PROFIBUS-DP
Pulse duration
S
Signal module
Setup, centralized
Setup,
distributed
SIMATIC Manager
STARTUP
STEP 7
STOP
System function
(SFC)
Glossary-4
PROFIBUS- - DP is the PROFIBUS bus system with the DP protocol. DP
stands for distributed periphery. The ET 200 periphery
system is based on the draft of the PROFIBUS- - DP standard (part 3 of DIN
19245).
PROFIBUS is a bus system which networks PROFIBUS- - compatible pro-
grammable controllers and field devices at the cell and field level.
PROFIBUS is available with the protocols DP (Distributed Periphery), FMS
(Fieldbus Message Specification) or TF (Technological Functions).
The pulse duration specifies the minimum time an output must be set.
Signal modules (SM) provide the interface between the process and the pro-
grammable controller. There are digital input and output modules, analog
input and output modules, and special SMs (e.g., the CM35).
Centralized setup means that the process periphery and CPU are located in
the same module rack or in expansion units in the same or an adjacent cabi-
net.
Didtributed setup means that the process periphery is not located directly
with the CPU in the same module rack or in the same or adjacent switching
cabinet. Instead, the process periphery and the CPU are located at a distance
from each other and are connected with a communication bus (e.g., fieldbus).
The SIMATIC Manager is the graphical user interface for SIMATIC users
under Windows.
STARTUP is an operating mode of the CPU which covers the transition from
STOP to RUN. STARTUP is triggered with the operating mode switch on the
CPU, after power on, or by operator input on the programmer.
STEP 7 is the programming language for the creation of user programs for
SIMATIC S7 controllers.
STOP is an international term (e.g., as an operating mode command).
A system function (SFC) is a function integrated in the CPU's operating
system which can be called by the user program like a function block (FB).
The related instance block is located in work memory.
CM35 Counter Module
(4) J31069-D0416-U001-A5-7618