SIEMENS
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Siemens IK PI · 2015
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Function
(continued)
PROFIBUS
Electrical networks (RS485)
Diagnostics repeater for PROFIBUS DP
3
Diagnostic functionality
Initiated by STEP 7, COM PROFIBUS or the user program
(SIMATIC S7-400 / S7-300), the diagnostics repeater identifies
the topology of the connected segments and saves this infor-
mation in the internal diagnostic memory.
If an error occurs, the repeater automatically transmits a
standard diagnostic message to the bus master with the
following information:
•
Affected segment
•
Error location (e.g. between station X and Y)
•
Distance from stations X and Y as well as from the repeater in
meters to the error location
•
Type of error
The following errors are diagnosed:
•
Break in signal lines A or B
•
Short circuit of signal lines A or B on the shield
•
Absent terminating resistors
•
Unacceptable cascading depth (between any two nodes,
no more than 9 repeaters be connected in series)
•
Too many stations in a segment
•
Station too far from the diagnostics repeater
•
Faulty messages
Sporadic
errors are also detected.
The error messages are displayed graphically in STEP 7 and
COM PROFIBUS. They are completely integrated in the
SIMATIC system diagnostics (e.g. overview diagnostics,
"Report system error" function).
The display in STEP7 also includes a help text with troubleshoot-
ing measures. The help text is written in a way that does not
require specific PROFIBUS expertise, so that the error can be
quickly localized and removed.
Network topology and statistics display
You can view the topology graphically in Step 7 as of V5.2. The
stations and the line lengths are shown in the topology display.
You can also view the bus system quality in the form of statistical
information.
Print function
STEP 7 V53.3, SP 3 includes an improved print function. It allows
you to preview on the screen and optimize the printout. For in-
stance, you can hide certain details and print out an overview of
the topology on DIN A4 or DIN A3 paper.
Configuring
The diagnostics repeater is configured as follows:
•
STEP 7 V5.1 or higher, incl. Service Pack 2
•
COM PROFIBUS V5.1, incl. Service Pack 2
•
External tools: Use GSD file
The topology can be determined using external masters with the
help of the COM PROFIBUS. The topology cannot be identified
using an external configuration tool. However, if the topology is
determined once using the COM PROFIBUS, error location infor-
mation will also be displayed in the external configuration tool.
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Technical specifications
6ES7972-0AB01-0XA0
Supply voltage
24 V DC
Yes
permissible range, lower limit (DC)
20.4 V
permissible range, upper limit (DC)
28.8 V
Interfaces
Bus cables
FastConnect insulation displacement,
10 clamping cycles possible
PROFIBUS DP
• Transmission rate, max.
12 Mbit/s; 9.6 kbit/s to 12 Mbit/s
Degree and class of protection
IP20
Yes
Ambient conditions
Operating temperature
• Min.
0 °C
• max.
60 °C
Storage/transport temperature
• Min.
-40 °C
• max.
70 °C
Relative humidity
• max. relative humidity
95 %; at 25 °C
Connection method
Power supply
Terminal block
Dimensions
Width
80 mm
Height
125 mm
Depth
67.5 mm
Weights
Weight, approx.
300 g
© Siemens AG 2014