Anybus CompactCom 40 EtherNet/IP
Doc.Rev. 1.5
Chapter 7
7. JSON
7.1 General Information
JSON is an acronym for JavaScript Object Notation and an open standard format for storing and ex-
changing data in an organized and intuitive way. It is used as an alternative to XML, to transmit data
objects consisting of attribute - value pairs between a server and a web application. JavaScripts are used
to create dynamic web pages to present the values.
JSON is more versatile than SSI in that you not only can change the values on a web page, but also the
size and the look of the web page dynamically. A simple example of how to create a web page is added
at the end of this chapter.
Access
The JSON resources should be password protected. Add password protection by adding a file called
web_accs.cfg in the root directory. See “Authorization” on page 30 for more information.
Error
If the module fails to parse or process a request the response will contain an error object with an Anybus
error code:
{
"error": 02
}
7.2 JSON Objects
7.2.1 ADI
info.json
GET adi/info.json[?callback=<function>].
This object holds data common to all ADIs that are static during runtime. Optionally, a callback may be
passed to the GET-request for JSONP output.
JSON object layout:
{
"dataformat": 0,
"numadis": 123,
"webversion": 1
}
Name Data Type Note
dataformat Number 0 = Little endian
1 = Big endian
(Affects value, min and max representations)
numadis Number Total number of ADIs
webversion Number Web/JSON API version
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