Omega C4EIT/-EIT manual Part Operations, Serial Interface Configuration Communication Protocol

PART 4

OPERATIONS

This iServer can be configured in several ways, depending on user’s preference and network setup. It can be configured using a Web browser like Chrome, Internet Explorer, or Firefox to access its Web server. It can also be configured using a TCP connection to port 2002 using a command line interface. The iConnect Configuration Software can also be used to find and configure the iServer over the Ethernet.

4.1 SERIAL INTERFACE CONFIGURATION - Communication Protocol

A data communication protocol defines the rules and structure of messages used by all devices on a network for data exchange. A typical transaction will consist of a request to send from the MASTER followed by the response from one or more SLAVE devices.

Either a single (point-to-point) or multi-drop network (multi-point) is possible.

4.2 Command Structure

There are different command types associated with communication between the Ethernet Server and your device shown in Table 4.1, which shows the Command Prefix Letters (Command Classes)

Table 4.1 Command Prefix Letters

COMMAND PREFIX
(COMMAND CLASS)	MEANING
^AE	Special read, Communication parameters
P (Put)	Write HEX data into RAM
W (Write)	Write HEX data into EEPROM.
G (Get)	Read HEX data from RAM
R (Read)	Read HEX data from EEPROM
U	Read status byte
V	Read measurement data string in decimal format
X	Read measurement data values in decimal format
D	Disable
E	Enable
Z	Reset
4.3 Command Formats

Table 4.2 shows the command formats for the Ethernet Server.

Table 4.2 Command Formats

For "P" and "W" Command	For "G" and "R" Command	For "X", "V", "U", "D", "E",
classes:	classes:	& "Z" Command classes:
Point-to-point mode	Point-to-point mode	Point-to-point mode
* ccc<data><cr>	* ccc <cr>	* ccc <cr>
Multi-point mode	Multi-point mode	Multi-point mode
* nnccc [<data>]<cr>	* nnccc <cr>	* nnccc <cr>

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