A-3
MODEL 2700 APPENDIX A
SERIAL COMMUNICATIONS PROTOCOL
1.3 DATA FORMAT
Baud rate: 300, 1200, 2400, or 9600
Parity: NONE
Byte format: One start bit, eight data bits,
one stop bit
Instrument Address: ADDR01 to ADDR32
(81H to A0H/129 to 160)
1.3.1 Read EEPROM 64H/100
Copies EEPROM to RAM.
To 2700 ADDR CMD
From 2700 ADDR CMD R
ADDR: Instrument Address
CMD: 64H
R: Result Code - ‘G’ Pass or ‘F’ Fail
Example:
Instrument Address = 1
Copy EEPROM to RAM passes
To 2700 81H 64H
From 2700 81H 64H 47H
‘G’
1.3.2 Read RAM 6EH/110
To 2700 ADDR CMD TYPE # A3 A2 A1 A0
From 2700 ADDR CMD TYPE # A3 A2 A1 A0 Data
ADDR: Instrument Address
CMD: 6EH
TYPE: Data type - Floating-point (‘F’) or Byte (‘B’)
#: Start of RAM address
An: RAM address; A3 is MSB
Data: Floating-point or Byte
Format Data
Floating-point F7 F6 F5 F4 F3 F2 F1 F0
Byte B1 B0
Floating-Point Instrument Alarm values and Sensor Measurement values are in the following units:
Measurement Units
Concentration per cent
Conductivity Siemens/centimeter
Dissolved Solids ppm-TDS
Dual\Difference Siemens/centimeter
Dual\Ratio per cent
Dual\%Pass,%Reject per cent
Temperature degrees Celsius
pH pH
mV-ORP mV
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