SIEMENS
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Siemens IK PI · 2015
PROFIBUS
Communication for SIMATIC S7-1500
CP 1542-5
3
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Function
The CP 1542-5 supports the following communications services:
•
PROFIBUS DP Master Class 1
- PROFIBUS DP (according to IEC 61158/61784)
- SYNC/FREEZE: The outputs or inputs can be synchronized
from the user program with the DPSYNC_FR system
function.
•
PROFIBUS DP slave (not when DP master)
•
PG/OP communication
•
Time synchronization via PROFIBUS
Master for PROFIBUS DP
The CP 1542-5 operates as DP-V1 master. It handles data trans-
fer independently and allows up to 32 slaves to be connected,
such as the CM 1242-5 as a DP slave, DP slaves of the ET 200
distributed I/O system, etc. This means that the CP 1542-5 is
able to connect the S7-1500 station to PROFIBUS DP and is
the ideal expansion to the integrated DP master interfaces of the
S7-1500 CPUs (CPU 1516 and larger) for establishing additional
PROFIBUS DP lines.
The CP 1542-5 is a DP-V1 master; in other words, it also sup-
ports the acyclic standard services, including alarm handling.
The CP 1542-5 also supports the functions SYNC, FREEZE, and
常数总线周期时间。
During normal operation, it is also possible to activate or
deactivate DP slaves. Among other things, this allows the
step-by-step commissioning of subprocesses.
A diagnostic repeater allows the line to be diagnosed during
operation, enabling line faults to be detected at an early stage.
The CP 1542-5 supports operation with a diagnostic repeater
(including activation of topology identification on the diagnostic
repeater).
There are no differences between the CP
1542 - 5和积分
DP master interface of the S7-1500 CPU with regard to configu-
ration and programming. The distributed I/O is therefore handled
like the central I/O just as for the CPU. Regardless of the scale
of the system, the CP 1542-5 has extremely short response
times.
PG/OP communication
PG/OP communication allows all S7 stations connected to the
network to be remotely programmed.
•
S7 routing: With the aid of routing it is possible to use
programming device communication across different
networks.
S7 communication
S7 communication is used for coupling to the following devices:
•
Programming devices (PG/OP communication)
•
HMI devices (OP)
Time synchronization
Time synchronization is used to set the time of day throughout
the plant.
The CP 1542-5 is capable of forwarding the time of day of the
S7-1500 CPU to PROFIBUS. Conversely, the CP of the S7-1500
CPU can make an existing time of day available on PROFIBUS.
The CP 1542-5 supports:
•
Time status value, daylight-saving time changeover, synchro-
nization status
Diagnostics
Extensive diagnostics options are available with STEP 7
Professional of the TIA Portal V12 SP1 or higher, including:
•
Status of the CP
•
General diagnostics and statistics functions
•
Connection diagnostics
•
Bus statistics
•
Alarm buffer
•
Support of operation with diagnostic repeater
Configuration
STEP 7 Professional of the TIA Portal V12 SP1 or higher is
required for configuring the full range of functions of the
CP 1542-5. The configuring data of the CP are always saved
on the CPU and are retained even after a PLC failure. A module
can therefore be replaced without having to reload the configu-
ration data from a programming device. The CPU transfers the
configuration data to the CP during start-up.
Configuration and programming of all SIMATIC S7 controllers
connected to the network is possible over the network.
© Siemens AG 2014