Parameter (P) command


(see command description format info here)

Function:Sends parameter or instruction to the DS
Can be issued through:Network (broadcasts ignored*, login not required, immediate authentication for this command can be enabled); serial port
Command format:P<relevant data> (see description of individual parameters and instructions for details)
Possible replies:A, C, D, R
First introduced:Earlier than "baseline" V3.14/V3.51
See also:Parameters and instructions, Authentication


Command code 'P' (Parameter) serves as a "common entry point" for sending a variety of parameters and instructions .

Network Parameter command can be made to require immediate authentication. To enable this feature:

On-the-Fly Password (OP) setting must be programmed to 1 (enabled);
Password (PW) setting must contain a password (i.e. a string of non-zero length).

When two above conditions are met each network Parameter command sent to the DS must contain a password, which is to be added at the end of the command after a slash character.

Example: below is the parameter command that changes the baudrate. The password is "123pwd"**:

-->DS:         PBR4/123pwd

DS-->:         A

If no password or incorrect password is supplied when the password is expected the Denied (D) reply code is returned.

* Without prior selection using Select In Broadcast Mode (W) command.

** Encapsulation characters such as IEC, STX, CR, and the command ID field are not shown.