nord NORDAC START Series, User Manual

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NORDAC START (SK 135E / SK 175E) – Users Manual for Motor Starters
76 BU 0135 en-4118
4.4 PROFIBUS DP
This section is only relevant for device of type SK 175E-...-PBR .
4.4.1 The bus system
PLC's, PC's, operating devices and monitoring devices can all communicate via a uniform bus in serial
bit mode using PROFIBUS DP. PROFIBUS DP is preferably used where time-critical rapid and
complex communication between individual devices is required. The bus system is suitable as a
substitute for cost-intensive parallel 24 V DC signal transfer of process data.
PROFIBUS communication is specified in the international standards IEC 61158 and IEC 61784.
Application and planning aspects are specified and documented in the guidelines of the PROFIBUS
users´ organisation (PNO). This ensures that devices from different manufacturers can communicate
with each other. The data exchange is specified in DIN 19245 parts 1 and 2 and application-specific
extensions in part 3 of this standard. As part of the European field bus standardisation process,
PROFIBUS is being integrated into the European field bus standard EN 50170.
4.4.2 Features
• Electrically isolated bus interface
• Status display (1 LED)
• Address setting via two rotary coding switches (beneath the casing cover)
• The PROFIBUS termination resistor can be switched in via jumpers
• Transfer of 4 control bits and 4 status bits
• Supports Sync Mode and Freeze Mode of the PROFIBUS DP communication function
• Watchdog function, in case of malfunction all bits of the setpoint PDO are set to 0
• No parameter communication
• Baud rate 12 Mbit/s
• Connection to device
– via terminal strip
– or via M12 system connectors