GD310-UL series VFD
Expansion card
-210-
Appendix A Expansion card
A.1 What this chapter contains
This chapter describes the expansion cards used in the VFDs.
A.2 PROFIBUS expansion card
(1) PROFIBUS is an open international fieldbus standard that allows data exchange among various
types of automation components. It is widely used in manufacturing automation, process automation
and in other automation areas such as buildings, transportation, power, providing an effective solution
for the realization of comprehensive automation and site-equipment intellectualization.
(2) PROFIBUS is composed of three compatible components, PROFIBUS -DP (Decentralized
Periphery, distributed peripherals), PROFIBUS-PA (Process Automation), PROFIBUS-FMS (Fieldbus
Message Specification). It is periodically exchange data with the VFD when using master-slave way.
PRNV PROFIBUS-DP Adapter module only supports PROFIBUS-DP protocol.
(3) The physical transmission medium of bus is twisted-pair (in line with RS-485 standard), two-wire
cable or fiber optic cable. Baud rate is from 9.6Kbit/s to 12Mbit/s. The maximum bus cable length is
between 100 m and 1200 m, specific length depending on the selected transmission rate (see
chapter
Technical Data
). Up to 31 nodes can be connected to the same PROFIBUS network when
repeaters aren’t used. But, if use repeaters, up to 127 nodes can be connected to the same
PROFIBUS network segment (including repeaters and master stations).
(4) In the process of PROFIBUS communication, tokens are assigned among main stations and
master-slave transmission among master-slave stations. Supporting single-master or multi-master
system, stations-programmable logic controller (PLC)-choose nodes to respond to the host instruction.
Cycle master-from user data transmission and non-cyclic master-master station can also send
commands to multiple nodes in the form of broadcast. In this case, the nodes do not need to send
feedback signals to the host. In the PROFIBUS network, communication between nodes cannot be
allowed.
(5) PROFIBUS protocol is described in detail in EN 50170 standard. To obtain more information about
PROFIBUS, please refer to the above-mentioned EN 50170 standards.
Summary of Contents for GD310-011P-4-UL
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