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12-20-2002
Figure Sheet 1-851-A
Page 2
Table 1-1: Technical Features for Profibus DP
SUMMARY OF PROFIBUS DP TECHNICAL FEATURES
Transmission Technique:
Profibus DIN 19245, Part 1
•
EIA RS 485 twisted pair cable or fiber optic.
•
9.6 kbit/s up to 12 Mbit/s, maximum distance 200m at 1.5 Mbit/s extendible with
repeaters.
Medium Access: Hybrid medium access
protocol according to DIN 19245, Part 1
•
Monomaster or multimaster systems supported.
•
Master and slave devices, maximum 126 stations possible.
Communications: Peer-to-Peer (User Data
Transfer)
or Multicast (Synchronization)
•
Cyclic master slave transfer and acyclic master-master data transfer.
Operation Modes
•
Operate: cyclic transfer of input and output data.
•
Clear: inputs are read and outputs are cleared.
•
Stop: only master-master functions are possible.
Synchronization: Enables synchronization of
the inputs and/or outputs of all DP slaves.
•
Sync-Mode: Outputs are synchronized.
•
Freeze-Mode: Inputs are synchronized.
Functionality
•
Cyclic user data transfer between DP-Master(s) and DP Slave(s).
•
Activation or deactivation of individual DP Slaves.
•
Checking of the configuration of the DP Slaves.
•
Powerful diagnosis mechanisms, 3 hierarchical levels of the diagnosis messages.
•
Synchronization of inputs and/or outputs.
•
Address assignments for the DP-Slaves over the bus with Master Class 2.
•
Configuration of the DP-Master (DPM1) over the bus.
•
Maximum 244 bytes input and output data per DP Slave, typical 32 bytes.
Security and Protection Mechanisms
•
All messages are transmitted with Hamming Distance HD=4
•
Watchdog timer at the DP slaves.
•
Access protection for the inputs/outputs at the DP slaves.
•
Data transfer monitoring with configurable timer DP Master (DPM1).
Cabling and Installation
•
Connecting or disconnecting of stations without affecting of other stations.