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4-54 7. PROFIBUS-DP
7. PROFIBUS-DP
PROFIBUS
• PROFIBUS is an open field bus independent on the bender that is used for various
applications in factory automation and process automation. PROFIBUS provides a
communication protocol (communication profile) that supports system hierarchy, i.e. DP
and FMS.
• When the V7 series is equipped with the communication interface unit CU-04 is
mounted, PROFIBUS-DP communications can be performed.
The V7 series can work as a slave station on PROFIBUS-DP. A maximum of 12 Mbps
is available (automatically set to the BUS baud rate). The signal level is RS-485.
* The V7 series can only communicate with the master PLC.
• PROFIBUS-DP supports I/O communications only. With I/O communication, it is not
possible to directly access the device memory (DB or MW) used in the CPU. To enable
the V7 series to have direct access to these memory devices, Hakko Electronics
supplies the function (ladder file) for message communications. When this function is
loaded in the master CPU, message communications using the Hakko Electronics’
original protocol are enabled, and the V7 series can have access to any memory
address.
• For the procedure of loading Hakko Electronics’ function, refer to the Specifications for
Communication Unit “PROFIBUS-DP.”
PROFIBUS-DP (RS-485)
ÆÆÆ
ÆÆÆ
ÆÆÆ
ÆÆÆ
ÆÆÆ
ÆÆÆ
V7 + CU-04
+
F1
F2
F3
F4
F5
F6
Master
Slave
V7
DB, I, Q, MW
DB, I, Q, MW
F1
F2
F3
F4
F5
F6
Hakko Electronics’
function
(ladder file)
Load
Master PLC