ProSoft Technology ProTalk PTQ-PDPMV1 User Manual page 218

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7.4.2 Commissioning of Communication with the SK1 Segment
Coupler
Since the SK1 segment coupler works transparently, PROFIBUS PA stations are
treated like PROFIBUS DP stations by the control system. This also applies to
commissioning. To make it possible for the control system to exchange station
data with a PROFIBUS, the GSD file of the station must be integrated into the
configuration tool of the control system.
The SK1 segment couplers receive the PROFIBUS DP telegram, convert it
simultaneously, and transmit it on the PROFIBUS PA side. The PROFIBUS PA
slave responds immediately to this telegram. The response telegram is received
by the segment coupler, is again converted simultaneously, and is transmitted on
the PROFIBUS DP side as a slave response.
Note: To make it possible for data exchange between the PROFIBUS DP and PROFIBUS PA to
work correctly, it is essential for the PROFIBUS DP transfer rate to be set to 93.75 kBd.
The time lapse between the Master call and the slave response is limited. Since
the PROFIBUS PA is working at a lower transfer rate than the PROFIBUS DP,
the standard settings of the bus parameters of the PROFIBUS DP Class 1
Master must be changed.
Note: If the bus parameters are not changed, no data exchange is possible between the
PROFIBUS DP Master and the PROFIBUS PA slave.
PROFIBUS DP configuration tools do not always make it possible to set all bus
parameters indicated in the following table. There are, however, dependencies
that the configuration tool uses to calculate the dependant variable from the
adjustable parameter value.
The following graph shows the standard settings of these parameter values for
operation with the non-modular segment coupler:
Parameter
Baud rate [kBit/s]
TSL[tbit DP]
Min TSDR [tbit DP]
TID2 [tbit DP]
Max TSDR
TID1 [tbit DP]
TSET [tbit DP]
TQUI [tbit DP]
G
HSA
max_retry_limit
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PROFIBUS DP Master Network Interface Module for Quantum
Value Description
93.75 PROFIBUS DP transfer rate
4095 Slot-Time
22 Min. Station-Delay-Time
1000 Idle2-Time
1000 Max. Station-Delay-Time
145 Idle1-Time
55 Setup-Time
0 Quiet-Time
10 Gap-Factor
126 Highest-Station-Address
1 Repetitions in event of failure
PTQ-PDPMV1 ♦ Quantum Platform
ProSoft Technology, Inc.
August 12, 2014