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TELEDYNE INSTRUMENTS
460L Instruction Manual Serial Communications
05228 Rev B 27
DCN 5164 PRINTED DOCUMENTS ARE UNCONTROLLED
7. SERIAL COMMUNICATIONS
The 460L comes equipped with a powerful digital Serial Communications Port that can be used for
Data Acquisition and for changing the monitor’s configuration. This port can be configured for
either RS-232 or RS-485 (half-duplex) operation. See Section 3.7.1 for details on configuring the
port
and connect
ing it to a computer or data acquisition system.
7.1. Serial Port Command Syntax
All characters sent and received are standard ASCII characters and all numbers are decimal
numbers converted to ASCII text.
All commands are sent using the following syntax:
<address><command>:<data1>,<data2>#<checksum (optional)><CR>
Where:
address is the monitor address (default =1)
command is the command string being sent
: (colon) is the data separator and is only included if data is being sent as part of the
command (See Command Details below to see if a command requires data or
not)
data1 is the first data parameter, if required.
data2 is the second data parameter, if required.
# is the Checksum separator, sent only if optional checksum is included
The checksum is an ASCII checksum of all characters up to the # character.
The checksum is optional. Commands sent without the checksum (and
checksum separator,) are also valid.
CR is a carriage return, ASCII 13.
Examples
Valid Commands with no data:
Checksum Included: 1ALMACK#474<CR>
No Checksum: 1ALMACK<CR>
Valid Commands with data:
Checksum Included: 1VSET:1,20#620<CR>
No Checksum: 1VSET:1,20<CR>