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Remote
Communication
This section discusses use of SIS commands via RS-232
communication to monitor and get information from the SCP.
It contains lists and explanations of the SIS commands that are
available for the SCP.
Topics that are covered include:
• Setting Up RS-232 Communication
• Communications Between the Host and the SCP
• Using SIS Commands
• Using the Switch and Button Table
Setting Up RS-232 Communication
The RS-232 interface allows you to obtain
information about the SCP and to activate certain
SCP functions from a host computer or other device
(such as a control system) attached to the rear panel
RS-232 port (shown at right). (For information on wiring this
port, see "Wiring the RS-232 Port" on page 10.)
Use the following protocol settings for your computer:
Baud rate: 9600
Data bits: 8
Parity: None
Stop Bits: 1
Flow Control: None
NOTE: For RS-232 communication, DIP
switch #1 must be set to On (up).
Communications Between the Host and the SCP
SIS commands consist of one or more characters per field. No
special characters are required to begin or end a command
sequence. When the SCP determines that a command is valid, it
executes the command and sends a response to the host device.
Most responses from the panel to the host end with a carriage
return and a line feed (CR/LF), which signals the end of the
response character string. A string is one or more characters.
J1
Gnd Rx
Tx
1
ON
234
SCP 104 and SCP 226 • Remote Communication 31