Siemens As-I Link Device Support Block (Siemens Dp/As-I-Link Dsb); Functions Of Siemens As-I Link - Honeywell Experion PKS User Manual

7 DEVICE SUPPORT BLOCK (DSB)

7.8 Siemens AS-i Link Device Support Block (Siemens DP/AS-i-Link DSB)

The Siemens DP/AS-i-Link DSB runs on the PGM and represents one PROFIBUS field device in the
PROFIBUS network. The Siemens DP/AS-i-Link DSB represents a PROFIBUS module and acts as a gateway
to an AS Interface bus. The Siemens AS-DP/AS-i-Link DSB processes the raw data from the Siemens DP/AS-i-
Link field devices and converts it to the PDC format supported by Experion. The Siemens DP/AS-i-Link
communicates with the master PGM for data conversion.
The Siemens DP/AS-i-Link supports the following two modules:
• Siemens DP/AS-i Link 20E
• Siemens DP/AS-i Link Advanced
The following table lists the functionalities supported by the Siemens DP/AS-i Link 20E and the Siemens
DP/AS-i Link Advanced modules.
Device
Siemens DP/AS-i Link 20E
Siemens DP/AS-i Link
Advanced
The AS-Interface bus can access up to 31 devices and access up to 62 devices when extended addressing is
used. The Siemens DP/AS-i-Link acts as PROFIBUS slave device and AS-I master at the same time and allows
the PROFIBUS master to access devices on the AS-i-bus. The PROFIBUS slave device and AS-I master can
have up to four binary inputs and four binary outputs.
The device input or output data and status or diagnostic information from the Siemens DP/AS-I Link to the
PGM is communicated through DP-V0.
Related topics
"Device Support Block (DSB) overview" on page 112
"CEAG Device Support Block (CEAGDSB)" on page 129
"Generic Drive Device Support Block (DRIVEDSB)" on page 124
"Generic Device Support Blocks (GENPADSB and GENPAGWDSB) for PA devices" on page 122
"Siemens ET200M Device Support Block (Siemens ET200M DSB)" on page 138
"Turck Excom Device Support Block (Turck Excom DSB)" on page 142
"Generic Device Support Blocks (GENDSB and GENIODSB)" on page 120

7.8.1 Functions of Siemens AS-i Link

Function
• Integrates the PROFIBUS DP slave devices to Experion.
• Reads data from field devices and writes output into field devices depending on whether the I/O module is
an input module or an output module.
• Processes extended diagnostic data and updates channel status and send notification based on the channel
status.
• Receives data from PIOMB and sends it to the device, if the PDC is connected to a PIOMB.
• Updates the PDC states.
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Supported functionality
• Up to 31 slave devices (no A/B extended slave addressing).
• Up to 4 digital inputs/outputs per slave device using DP-V0.
• Supports both single master and double master AS-i (that is, up to two AS-i segments).
• Up to 31 slave devices (no A/B extended slave addressing) per AS-i segment.
• Up to 4 digital inputs/outputs per slave device using DP-V0.