Zektor DVS5.1 User Manual download pdf (Page 3)

An RS-232 Overview

The RS-232 interface for Zektor products has been designed to be simple, straight forward and still allow the installer

full access to the capabilities of the product being controlled.

• The cable used to connect to a standard PC is a straight through RS-232 cable. The same type of cable used

to connect to a standard serial modem.

• All commands sent to the RS-232 interface consist of the command followed by a carriage return.

• All commands follow the same format.

• For easy parsing all strings returned from the RS-232 interface are identified by the first character of the string.

• There are only 3 possible response codes coming from the interface. They are identified by the 3 following char-

acters:

‘+’ - The acknowledgement of a valid command.

‘!’ - The command caused an error (followed by the error code).

‘=’ - Indicates a status string (followed by the status string).

• All status strings follow the same format.

• All status strings are always terminated with a carriage return / line feed combination to allow for easy buffering

of returned strings.

Pinout

Transmit: Pin 2 (Transmit from Serial Slot option to the PC)

Receive: Pin 3 (Receive from the PC to the Serial Slot option)

Signal GND: Pin 5

Serial Port Settings

Baud Rate: 9600

Data Bits: 8

Parity: None

Stop Bits: 1

The Command String Format

Where:

<cmd> = The RS-232 command.

<parameters>= Optional parameters required by some commands.

<CR> = The Carriage Return character used to terminate the command.

All commands will be acknowledged, with either a simple acknowledgment string, or an error code, depending upon

the command’s successful execution.

The Acknowledgment String

+<CR><LF>

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Zektor DVS5.1 User Manual Page 3