Rs-232 Control - Elan System12 Installation Manual And User's Manual

E L A N H O M E S Y S T E M S

RS-232 Control

General Information
The S12 serial interface is a 3-wire RS-232 (Rx, Tx, Ground-Pins 2, 3, and 5 respectively).
S12 Communication Port Settings
Baud Rate
Data Bits
Parity
Stop Bits
Flow Control
Command Structure
• Prefix:
Must be present for every command string (Required)
• Command:
&S12, cmd, par 1, par 2 <cr>
&S12,ACK
&S12,ACK<cr> is a command that is transmitted by
the S12 whenever it receives a command with the
correct structure. It does not mean that the command
was performed. To ensure that the command was
performed correctly, the S12 needs to be queried.
The following are correct serial command structures:
• &S12,SYSOFF
• &S12,PWR,01,1
If &S12,SYSOFF command is transmitted to the S12,
the S12 will respond with &S12,ACK.
If &S12,PWR,100,1 is transmitted to the S12, the S12
will NOT respond with a &S12,ACK because 100 is out
of the scope. That field supports Zones 01-32 for this
particular command.
© ELAN Home Systems 2004 • All rights reserved.
19200
8
None
1
None
See list below for all commands (Required)
• Parameter 1:
Usually Zone 01-32 command
(Optional for some commands, required for others)
• Parameter 2
(Optional for some commands, required for others)
• Carriage Return:
SYSTEM12
0x0d or Decimal 13 (Required)
If there is only one S12 in the System, Zones 1-8, and
&S12,PWR,09,1 is transmitted to the S12, the S12 will
NOT respond with a &S12,ACK because Chassis 1
does not support Zone 09. Chassis 1 supports Zones
01-08 for this particular command.
If an &S12,ACK is not received within 200ms:
• the command was formatted incorrectly
• an error has occurred in the S12
• serial cable not connected or defective
• S12 does not have power
The S12 requires at least 50ms between each serial
command transmitted to it. However, if the &S12,ACK
is received prior to 50ms, another command can be
transmitted immediately.
INSTALLATION MANUAL
Page 63