zektor serialoption ユーザーズマニュアル

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

<cmd><parameters><CR>

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>