Siemens SIMATIC S7-1500 Manual page 24

Product overview
2.3 Firmware functions
Function
Integrated trace function-
ality
OPC UA
Configuration control
PROFINET IO
RT (real time)
IRT (isochronous real
time)
Isochronous mode
24
Description
The trace functionality supports the troubleshooting
and/or optimization of the user program.
You record device tags and evaluate the recordings
with the trace and logic analyzer function. Tags are, for
example, drive parameters or system and user tags of
a CPU.
The device saves the traces. If necessary, you can
read the traces with the configuration system (ES) and
save them permanently. Thus, the trace and logic ana-
lyzer function is suitable for monitoring highly dynamic
processes.
The trace recording can also be displayed via the web
server.
With OPC UA, you can exchange data via an open and
manufacturer-neutral communication protocol. The
CPU can act as an OPC UA DA server. The CPU act-
ing as the OPC UA server can communicate with
OPC UA clients.
The OPC UA Companion Specification allows methods
to be specified uniformly and independently of the
manufacturer. Using these specified methods, you can
easily integrate devices from various manufacturers
into your plants and production processes.
Configuration control allows you to operate different
real hardware configurations by configuring a maximum
configuration of the S7-1500/ET 200MP distributed I/O
system. This means you have the option to oper-
ate/configure different configuration variants of a ma-
chine with a single project.
RT prioritizes PROFINET IO message frames over
standard message frames. This ensures the required
determinism in the automation technology. The data is
transferred via prioritized Ethernet frames.
A reserved bandwidth is available within the send clock
for the IRT data. The reserved bandwidth guarantees
that the IRT data can also be transmitted unaffected by
a high network load (for example, TCP/IP communica-
tion or additional real-time communication) in reserved,
synchronized intervals. IRT enables update times to be
achieved with the highest deterministics. IRT makes
isochronous applications possible.
The clock synchronization system characteristic ac-
quires measured values and process data and pro-
cesses the signals within a fixed system clock.
Isochronous mode thus contributes to high control
quality and hence to greater manufacturing precision.
Clock synchronization reduces possible fluctuations of
the process reaction times to a minimum. Time-assured
processing enables higher machine clocks to be
achieve.
Additional information
Function manual for trace and logic
analyzer function
(http://support.automation.siemens.c
om/WW/view/en/64897128)
Communication function manual
(https://support.industry.siemens.co
m/cs/de/de/view/59192925/en)
S7-1500, ET 200MP system manual
(http://support.automation.siemens.c
om/WW/view/en/59191792)
PROFINET function manual
(http://support.automation.siemens.c
om/WW/view/en/49948856)
CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
Manual, 12/2017, A5E40882737-AA