Distributed I/O Instructions; Diagnostic Instructions - Siemens S7-1200 System Manual

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Table 10- 31 Parameters for the PROFIBUS address

Name of the Subnet to which the device is connected. Click the "Add new subnet" button to create a

new subnet. "Not connected" is the default. Two connection types are possible:

The "Not connected" default provides a local connection.

A subnet is required when your network has two or more devices.

Highest address

Transmission rate

Distributed I/O instructions

Refer to "Distributed I/O (PROFINET, PROFIBUS, or AS-i)" (Page 314) for information on

how to use the distributed I/O instructions with these communication networks.

Refer to the "Diagnostics (PROFINET or PROFIBUS)": "Diagnostics instructions" (Page 345)

for information on how to use these instructions with these communication networks.

S7-1200 Programmable controller

System Manual, 03/2014, A5E02486680-AG

Assigned PROFIBUS address for the device

The highest PROFIBUS address is based on the active stations on the

PROFIBUS (for example, DP master). Passive DP slaves independently

have PROFIBUS addresses from 1 to 125 even if the highest PROFIBUS

address is set to 15, for example. The highest PROFIBUS address is

relevant for token forwarding (forwarding of the send rights), and the token

is only forwarded to active stations. Specifying the highest PROFIBUS

address optimizes the bus.

Transmission rate of the configured PROFIBUS network: The PROFIBUS

transmission rates range from 9.6 Kbits/sec to 12 Mbits/sec. The

transmission rate setting depends on the properties of the PROFIBUS

nodes being used. The transmission rate should not be greater than the

rate supported by the slowest node.

The transmission rate is normally set for the master on the PROFIBUS

network, with all DP slaves automatically using that same transmission rate

(auto-baud).

Communication

10.3 PROFIBUS