GE P485 - Manual (Page 17)

INSTALLATION
P485 MODBUS TO PROFIBUS CONVERTER – USER GUIDE 2–7
For example, to set the node address to 42, set switch A to “2” and switch B to “4”.
When removing the hatch, avoid touching the circuit boards and components. Exercise
caution when using tools to open the hatch.
Profibus installation procedure
PROFIBUS
CONFIGURATION TOOL
Each device on a Profibus-DP network is associated with a GSD file, which contains all
necessary information about the device. This file is used by the Profibus configuration tool
during configuration of the network. The file is available for download at the GE Multilin
website at
http://www.GEmultilin.com (the GSD file is named ‘P48509E5.GSD’).
It is necessary to import the GSD file in the Profibus configuration tool in order to
incorporate the P485 as a slave in the network. The properties for the P485 must then be
configured from the Profibus configuration tool. This includes setting up the node address,
input/output data areas and offset address.
• Node address: The node address in the Profibus configuration tool should be set to
match the one selected using the on board configuration switches of the P485 (see
Configuration switches on page 2–6).
• Setting up input/output data areas: Input/output data are arranged as logic modules
in the Profibus configuration tool. Which modules to use depends on the application.
The modules are composed together in the “module list” for the P485 device.
It is possible to select modules freely to compose the required input/output sizes, see
example below.
• Offset address: The offset addresses can be chosen freely. However, certain
restrictions may apply depending on what PLC/Profibus master is used.
PROFIBUS NETWORK
TERMINATION
If the P485 is the last node on a Profibus segment, it is necessary to use a Profibus
connector with integrated termination switch.
• The termination switch should be set to ‘ON’ if...
– The P485 is the last physical node on a network segment
– No other termination is used at this end of the network
• The termination switch should be set to ‘OFF’ if...
– There are other nodes on either side of the P485 in the network segment
LINKS Additional information about the Profibus fieldbus system can be found at http://
www.profibus.com .
NOTE
Input/output bytes required Modules
4 inputs and 2 outputs 4 inputs + 2 outputs
7 inputs and 12 outputs 4 inputs + 2 inputs + 1 input + 8 outputs + 4 outputs
68 inputs 64 inputs + 4 inputs