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FG_F6_MODBUS_EN_01 / 2020-06-17
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Direct access
In Direct access, the master can only access to bits one by one.
Example for reading the state of the “Sequencing activation” bit (word 1, bit 14):
Master
Slave
—
Put in edition the program number on which the
functions bits have to be read
—
Make a
Read N*words
request of 1 word at the
2622h
address.
On network:
01
03
26
22
00
01
2F
48
01
Slave address
03
Function number (Read N*words)
26 22
D.A. address of the “Sequencing act.” bit
00 01
Number of words to read
2F 48
CRC
—
Answer to the request:
On network:
01
03
02
01
00
B9
D4
01
Slave address
03
Function number (Read N*words)
02
Number of read bytes
01 00
Word: read 0001h (Sequencing act. bit = 1)
B9 D4
CRC
Содержание F6 Profinet Series
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