REXROTH Fv Series, Instruction Manual

Page: 193 / 222

12.3 PROFIBUS Protocol
12.3.1 Protocol Description
PROFIBUS is an open serial communication standard, which enables data
exchange among various automatic control devices. PROFIBUS mainly in‐
cludes three types: PROFIBUS-FMS (Fieldbus Message Specifications),
PROFIBUS-DP (Distributed Peripheral Equipment) and PROFIBUS-PA
(Process Automation). Bosch Rexroth PROFIBUS adapter module only sup‐
ports PROFIBUS-DP protocol.
PROFIBUS is widely used in various industries such as manufacturing auto‐
mation and process automation, building, transportation, electronics, etc.
Through PROFIBUS, automation equipments from different manufacturers
can be easily connected into the same network for data exchange. The frame
structure of data information in PROFIBUS network is shown in fig. 12-22
"PROFIBUS Frame format" on page 191 . Contents of user data will be de‐
scribed in communication protocol section.
Protocol frame
(header)
User data
(control information/status
information)
Protocol frame
(end)
Fig.12-22: PROFIBUS Frame format
Physical transmission medium for PROFIBUS is twisted-pair cable (RS-485
standard). Maximum length of bus cable is within the scope of 100 – 1200 m,
depending on the set transmission rate. When no repeater is used, 32 nodes
at maximum can be connected to the same PROFIBUS network; if a repeater
is used, nodes connected to the network may be increased to 126. In
PROFIBUS communication, the master is usually a programmable logic con‐
troller (PLC), which is able to select the nodes responsive to commands from
the master. In PROFIBUS network, no communication can be achieved
among nodes.
PROFIBUS protocol is described in detail in standard EN 50170.
For further information regarding PROFIBUS, please refer to
standard EN 50170.
12.3.2 Bosch Rexroth Fieldbus Adapter
Technical Data
Technical parameters Performance
Input voltage + 5 VDC, ±10%, 80 mA
Baud rate (DP interface communication) 9.6 kbps ─ 12 mbps
EMC requirement
IEC 1000-4
Fig.12-23: Adaper technical parameters and performance
Functions
Bosch Rexroth fieldbus adapter is able to control Frequency Converter Fv
through PROFIBUS-DP fieldbus. Main functions of the fieldbus adapter are
as below:
●
Sending control commands to frequency converter (such as start, stop,
jog, etc.).
● Sending frequency setting signal to frequency converter.
DOK-RCON02-FV*********IB01-EN-P
Rexroth Frequency Converter Fv Bosch Rexroth AG 191/219
Communication Protocols