Laurel Electronics LAUREATE SERIES Serial Comunications - Manual (Page 9)

2.0 INTERFACE INFORMATION
The series of DPMs and counters offers RS232 or RS485 serial communication interface boards
that may be connected by cable to computers, remote displays, printers or other digital devices
having similar serial communication capability. Software is available for use with an IBM-
compatible PC/XT/AT computer that simplifies the logging of measurement data on the computer
and provides capability for the remote setting of parameter values in lieu of using the front panel
menu setup.
3.0 RS232 AND RS485 FORMAT
3.1 SERIAL COMMUNICATION FORMAT
The serial communication format for both RS232 and RS485 is the following:
Mode
Full Duplex (Separate transmit and receive lines) and Half Duplex (RS485
only)
Baud Rate 300, 600, 1200, 2400, 4800, 9600, 19200 selectable by front panel Menu
item
“Ser 1”, Sub-menu item “Digit 4” for DPM, "Digit 5" for counter.
Parity None
Word length 8 data bits
Stop bit 1
3.2 MEASUREMENT DATA FORMAT
The basic measurement data format consists of 8 ASCII characters:
(shown for DPM, add 1 more digit for counter)
+999.99 where is the carriage return character
Notes: The first character is always a plus or minus sign, and a decimal point is always
furnished, even when it follows the last digit and is not required.
Adding a Line Feed Character to the Basic Format
Printers and other devices that receive the measurement data sometimes require a line feed
character following the carriage return character . The line feed may be selected in "Ser
2"
Adding a Coded Data Character to the Basic Format
It is also possible to add a coded character to the data format to indicate the alarm, overload and
zero-blanking status of the meter. If used, this character precedes the so it is the last printable
character in the format ( and are control characters and are not printable). This coded
character may be selected in "Ser 2"
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