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CHAPTER 1
INTRODUCTION
1.6 Technical features of Profibus-DP
Physical media: EIA RS 485 twisted pair cable or fiber optic.
Baud rate: 9.6 kbps up to 12Mbaud.
Maximum number of nodes: 126
Maximum number of I/O: 244 bytes/slave.
Bus topology: Master-Slave communication. The figure below gives an overview of a Profibus-DP network.
Cyclic user data transfer between DP-Master and DP-Slaves.
Watch-Dog Timer at the DP-Slaves
Connecting or disconnecting stations without affecting other stations.
Powerful diagnosis mechanisms, 3 hierarchical levels of the diagnosis messages.
Synchronization of inputs and/or outputs.
All messages are transmitted with Hamming Distance HD=4.
Figure 1-4 Bus cycle time of a Profibus-DP Mono Master system (2 bytes I/O data/slave)
1.7 Production specification
Basically, the environmental specification of the SJ-PB2/SJ-PBT2 is in accordance with SJ700/SJ300/L300P
series inverter. Please refer to the instruction manual of SJ700/SJ300/L300P series.
But only application temperature of SJ-PB2/SJ-PBT2 is different. Please note.
application temperature : 0 to 50 degree
4
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