Profibus Fdl Coupling (Sinec L2 Fdl); Hardware And Central Coupling Block; Hardware For Profibus Fdl - Siemens SIMADYN D Manual

3.6

PROFIBUS FDL coupling (SINEC L2 FDL)

General
3.6.1

Hardware and central coupling block

3.6.1.1

Hardware for PROFIBUS FDL

Hardware
System- and communication configuring D7-SYS - SIMADYN D
Edition 12.2003
• An additional configuring tool (COM, NML) is not required for the
PROFIBUS FDL coupling (Fieldbus Data Link).
• PROFIBUS FDL (FDL=Fieldbus Data Link) is a bus system in
accordance with EN50170 (DIN 19245 Part 1).
• Both PROFIBUS FDL as well as PROFIBUS FMS nodes can be
connected to the same bus cable.
Bus access is realized using token passing with a subordinate master-
slave technique:
• Masters are active nodes, which pass-on the token and which can
transmit.
• Slaves are passive nodes, which can only transmit when directly
requested to by a master.
Three FDL utilities are defined in the standard:
1. SDA (send data with acknowledge) for master-master
communications
2. SDN (send data with no acknowledge) for broadcast
3. SRD (send and receive data) for master-slave communications
As far as FDL is concerned, SIMADYN D is always a master and
exclusively uses the FDL utility SDA. Other FDL masters can be
considered as communication partners. The process data and message
system utilities can use the PROFIBUS FDL coupling as SIMADYN D
communications utility.
The following hardware is required for the PROFIBUS FDL coupling:
• Subrack
• CPU
• CS7 module with SS5 communications module (this must also be
configured in HWConfig)
The data interface between the CPU and SS5 has 16 kbytes.
Communications configuring
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