Emerson Rosemount 56, Инструкция по эксплуатации

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Profibus Communications 97
Instruction Manual Section 12: Profibus Communications
LIQ-MAN-56 April 2017
12.3 Profibus Communications
12.3.1 Configuring the 56 for Profibus Communications
Baud Rates
The 56 supports all the baud rates of Profibus DP as shown in Table 12.2.1 below. Since the
56 supports transmission rate recognition, it will recognize the baud rate used on the
network, and set its own baud rate to match the network’s rate.
Slave Address
The 56 supports the set slave address function, which makes it possible for the Profibus
master to set the slave address of the 56. Some Profibus masters cannot set slave addresses,
and the slave addresses have to be set in each slave device. If this is case, the slave address
can be set in the 56 by pressing the Enter/Menu key and selecting DP: Profibus, which will
launch the Profibus configuration window:
• The Profibus address is writeable up to a value of 126.
• At the same time the slave address is being set, Profibus cable diagnostics should be
enabled. These diagnostics provide a useful tool for troubleshooting cable connection
problems.
Table 12-2. Baud Rates Supported
Baud Rate Maximum Response Time for Responders (unit is bit time)
9.6 kbps 60
19.2 kbps 60
45.45 kbps 60
93.75 kbps 60
187.5 kbps 60
500 kbps 100
1.5 Mbps 150
3 Mbps 250
6 Mbps 450
12 Mbps 800