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Ultra
Version M 22-April-2012
SOFTWARE
1.0 Serial Interface
The primary communications and control is via the RS-232 port lo-
cated on the ICE450 front panel (Rack ICE450 back panel). The ICE
can be set to lock out front panel key control and avoid conflict with
RS-232 communications.
The serial communications configuration is:
•
9600 baud
•
8 data bits
•
no parity
•
1 stop bit
•
no flow control
•
The Ultra uses only Tx and Rx for its communications
•
No hardware handshaking is utilized
To send a command:
Enter a command from the command set,
followed by a carriage return, CR (‘\r’, 0x0D) and line feed, LF
(‘\n’, 0x0A), in that order.
Note:
The characters of a command can be upper or lower case.
To query a value:
Send the command with no extra characters
followed by a carriage return and line feed. The ICE450 responds by
sending a CR, LF and a 15-character string of information, which is an
ASCII-formatted representation of the requested value with as many
spaces as required to make the string 15 characters.
To set a value:
Send a command followed immediately by the value
(no space), then followed by a carriage return (CR) and line feed (LF).
The ICE450 will respond with the new value if it is valid or with the old
value if the new value is invalid.
Each command has a unique response structure. These are given in the
Serial Command Reference section.
Minimum delay between commands:
The minimum allowable
time between commands depends on the commands used; in general,
you should provide a delay of 150 msec between commands.
Unrecognized commands:
If a command is sent that the ICE450
does not recognize, the ICE450 will respond with the message “
cmd
not found
”.
Use of Terminal Emulator:
To simplify corrections, the protocol
allows backspaces to erase the last-sent character. To improve
readability when using a terminal emulation program, such as
HyperTerminal, enable the “Backspace sends ctrl-H, space, and ctrl-H”
setting.
Graphical User Interface:
The ICE450 may be controlled via a
serial COM port from the PC using the GUI.
RS-232
port
RACK ICE450 SERIAL
CONNECTION
RS-232
port
ICE450 SERIAL
CONNECTION
The RS-232 serial interface is on at power-up.
As a safety feature, when any button on the Remote Box is pressed,
the serial link is disabled (OFF) to give priority to the Remote Box.
To re-enable serial communications, use the Remote Box to select
the System menu and set the “serial link” item to ON.
Note:
If you are unable to communicate with the ICE450 using the
serial link, check the System menu, serial link setting.
