ProSoft Technology PTQ-PDPMV1 User Manual
Page 218
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PTQ-PDPMV1 ♦ Quantum Platform
User Manual
PROFIBUS DP Master Network Interface Module for Quantum
Page 218 of 306
ProSoft Technology, Inc.
August 12, 2014
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
Value
Description
Baud rate [kBit/s]
93.75
PROFIBUS DP transfer rate
TSL[tbit DP]
4095
Slot-Time
Min TSDR [tbit DP]
22
Min. Station-Delay-Time
TID2 [tbit DP]
1000
Idle2-Time
Max TSDR
1000
Max. Station-Delay-Time
TID1 [tbit DP]
145
Idle1-Time
TSET [tbit DP]
55
Setup-Time
TQUI [tbit DP]
0
Quiet-Time
G
10
Gap-Factor
HSA
126
Highest-Station-Address
max_retry_limit
1
Repetitions in event of failure