SIEMENS
3/67
Siemens IK PI · 2015
PROFIBUS
Electrical networks (RS485)
Diagnostics repeater for PROFIBUS DP
3
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Overview
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RS 485 repeater with online line diagnostics for PROFIBUS DP
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DP standard PROFIBUS slave (DP-V1)
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Automatic determination of fault types and locations
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Data transmission rate 9.6 kbit/s to 12 Mbit/s
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Connection through FastConnect using the insulation
displacement method
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Application
The diagnostics repeater for PROFIBUS DP connects
PROFIBUS DP segments with RS 485 technology. It also
physically monitors the copper bus lines in online mode.
If an error occurs, it sends a diagnostic message to the DP
master with detailed information on the type and location of
the error.
The diagnostics repeater is a standard slave. It can be operated
on any DP master that supports the standard RD_REC and
WR_REC services. To record the topology, you will need either
STEP 7 or COM PROFIBUS.
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Design
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Enclosure with degree of protection IP20
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Assembly on S7-300 DIN rails or standard DIN rails
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LEDs to display 24 V DC, bus activity and line errors per
segment
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Terminal block for external 24 V DC supply voltage
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9-pin Sub-D socket for PG connection
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Connections for 3 bus segments with FastConnect insulation
displacement connection
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The diagnostics repeater is integrated into the bus system as
a PROFIBUS DP standard slave. It enables the following:
- monitoring of 2 PROFIBUS DP segments
- max. 31 stations per segment (max. 62 stations per
diagnostics repeater)
- max. segment length 100 m (independent of the baud rate)
- configuration of up to 9 diagnostics repeaters in a row
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Use only approved bus connectors on the diagnostics-
capable segments (see Ordering Information/Accessories)
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Observe the configuration guidelines for 12 MBaud networks
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Function
Mode of operation
Repeater functionality
The diagnostics repeater is integrated into the bus system as a
RS 485 repeater, but it has its own PROFIBUS DP address:
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Expansion of extension in the bus system
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Regeneration of the signals in edge steepness, amplitude and
time (re-timing)
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Isolates connected segments
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Configuration in STEP 7, COM PROFIBUS or also using a
GSD file.
As of FW Version V2.0.0, the following additional functions will be
supported:
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I&M functions according to PROFIBUS Guideline
Order No. 3.502 in version V1.1, dated May 2003
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Time synchronization via S7 mechanisms
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DP cycle time measurement and statistics
© Siemens AG 2014