Appendix C: Rs-232 Serial Control Commands; General Information; S128P Communication Port Settings - Elan S128P Installation Manual

S128P
INSTALLATION MANUAL

Appendix C: RS-232 Serial Control Commands

General Information

The S128P serial interface is a 3-wire RS-232 (Rx, Tx, Ground-Pins 2, 3, and 5 respectively).

S128P Communication Port Settings

Baud Rate
Data Bits
Parity
Stop Bits
Flow Control
Command Structure
• Prefix:
&S12, cmd, par 1, par 2 <cr>
&S12,ACK
&S12,ACK<cr> is a command that is transmitted by the S128P 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 S128P 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 S128P, the S128P will respond with &S12,ACK. If &S12,PWR,100,1
is transmitted to the S128P, the S128P will NOT respond with a &S12,ACK because 100 is out of the scope. That
field
supports Zones 01-32 for this particular command.
If there is only one S128P in the System, Zones 1-8, and &S12,PWR,09,1 is transmitted to the S128P, the S128P 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 S128P
• serial cable not connected or defective
• S128P does not have power
The S128P 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.
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19200
8
None
1
None
Must be present for every command string (Required)
• Command:
See list below for all commands (Required)
• Parameter 1:
(Optional for some commands, required for others)
• Parameter 2
(Optional for some commands, required for others)
Usually Zone 01-32 command
• Carriage Return:
0x0d or Decimal 13 (Required)
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1/15/2009 1:07:43 PM