ComBricks User Manual v6.4.0 | January 18| © PROCENTEC
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12.3
Link mode (module firmware v2.10.1 and higher only)
To use the module in Link mode, make sure it has module firmware version 2.10.1 and up, and NOT version 1.x.
Refer to
paragraph 17.2
for updating your PA module. Also update the Head Station firmware to 1.279 or
higher.
Set the 3
rd
dipswitch ‘LNK’ to ‘ON’ (to the right). Then connect a power source to the
connector on top of the module. The DC voltage offered to the PA coupler module is
the same as the output on the PA side. The minimum is 11VDC, maximum is 28VDC.
This module is now a fully functional PROFIBUS PA Link/Coupler combination. It is semi-transparent on all baud
rates, it also sends FDL status requests onto PA. It supports connection of up to 126 devices that can take up a
total of 500mA from the bus. Furthermore, all functionality described in paragraph 12.2 is also available in Link
mode.
To receive telegrams from a PLC or DCS in Link mode, you need to install another module in the
ComBricks backplane. This module can be any PROFIBUS DP interface card, either fiber optic or
copper. All modules in chapters 7, 8 and 9 can be used. Set this DP card to the same network as the
PA module.
12.3.1
Converting PA GSD files
For PA devices to correctly work in a DP configuration environment, it is necessary to alter the GSDs. It is highly
recommended to use our GSDConvert tool for this, and NOT do it manually! The tool changes several lines in
the GSD file so that it can be used on all baud rates instead of only the PA baud rate.
Download the tool on www.procentec.com.
Simply choose a GSD file and click ‘Open’, then choose the location to save
it and click ‘Save’. The program will create a new GSD file with ‘LNK_’ as the
first four characters. The last four characters are the Ident number of the
slave.
Import the new file into the configuration tool and use it as if it was a normal DP slave. Any baudrate can be
used on the DP-side.
In Link/Coupler mode, the module has a fixed master address 1 on the PA side. The use of address 1 for PA field
devices is therefore not possible.
12.3.2
Link configuration
–
bus parameters
The PA module in Link mode offers the possibility to configure the Watchdog time and the number of retries on
the PA bus. These bus parameters are independent from the DP master parameters. Click on the Status page
and then on the PA module to configure these parameters. See
for available options.
Summary of Contents for ComBricks
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Page 213: ...ComBricks User Manual v6 4 0 January 18 PROCENTEC 213 219 44 Certificates ...
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Page 217: ...ComBricks User Manual v6 4 0 January 18 PROCENTEC 217 219 45 Notes ...
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