Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 20)

<5. CONFIGURATION>
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IM 11M12D01-61E
5. CONFIGURATION
This section describes how to customize the functions and tailor the performance of the AV550G to
suit specific applications. Because multiple devices are connected to the Fieldbus, it is important to
take care to consider the network as a whole to eliminate any design defects that might adversely
affect the network as a whole. The design procedure is as follows:
(1) Initial network design
Determine the devices to be connected to the Fieldbus, determine maximum power
requirements and ensure that power supply capacity will be sufficient.
(2) Define network constants
Determine/Define unique PD tag and node addresses for all devices.
(3) Define connections (communications) between function blocks
(4) Set any device PD tag and node addresses that need to be changed
(5) Set communication settings for connections between function blocks
Set links between function blocks and communication parameters.
(6) Set function block parameters that should be changed from default values.
These steps are explained below. Special purpose configuration tools can greatly simplify and
facilitate setup.
This section covers procedures for setting up basic functions (e.g. for basic Fieldbus devices);
procedures for more complex devices such as Link Masters are described in Appendix 5.
5.1 Initial network design
Select the devices to be connected to the Fieldbus network. The following are essential for the
operation of Fieldbus.
• Power supply:
Fieldbus requires a special power supply, you cannot use an ordinary DC power supply. The
power supply should be capable of supplying more current that the sum of the maximum
currents drawn by individual devices, including hosts.
• Terminator:
Fieldbus requires two terminators. Sometimes these are supplied with the host, so please check
• Fieldbus devices:
Connect the field devices that will be used in the Fieldbus system. The AV550G has passed
interoperability tests conducted by the Fieldbus Foundation. If you are starting up a new Fieldbus
system, we recommend that you use only devices that have passed the interoperability tests, in
order to ensure a smooth startup.
• Host:
Hosts can access and control Fieldbus devices. You need at least one “Link Master” host in a
Fieldbus system.