Engineering; Overview Of Engineering; Application Notes - ABB SPA-ZC 402 Installation And Commissioning Manual

1MRS756019
5.
5.1.
5.2.
Ethernet Adapter
SPA/TCP Bridge
Installation and Commissioning Manual

Engineering

This section guides when performing the engineering tasks required before using
SPA-ZC 402.
Note that all the possible engineering scenarios are not included in this
manual. You must have engineering rights to be able to perform the
tasks described in this section.

Overview of engineering

The engineering and maintenance of SPA-ZC 402 is done by using CET for
SPA-ZC 40x functions. The device's communication structure is described in the
Project Explorer dialog. The structure is built by using device objects. These objects
have communication properties that can be accessed through the Object Properties
dialog. These properties define for example the IP addresses, unit addresses, and
descriptions.
The communication structure consists of SPA devices.
When the structure is complete and all the objects have been set up properly, the
configuration is downloaded through FTP to SPA-ZC 402 by using the CID
(Configured IED Description) Export function.
The engineering tasks are the following:
1. Building an object tree by adding a device to the configuration
2. Configuring object properties, for example modifying TCP/IP address
3. Configuring SPA communication parameters
4. Exporting configuration data to SPA-ZC 402

Application notes

Since the SPA protocol is designed to be used in a defined environment on serial
lines with one master only, it has some deficiencies when using it on top of other
protocols, for example on TCP/IP.
The SPA protocol does not have a mechanism for linking poll and response
messages together, only mechanism to order the messages . If the order is disturbed,
for example, by unpredictable delays or message duplication in the network, the
data consistency cannot be guaranteed. For the same reason, only one master can be
reliably used with an SPA bus, as it is not possible to identify from the responses to
which master poll the response is intended.
The following communication paths are considered safe for SPA communication:
SPA-ZC 402 SPA-ZC 402
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