KROHNE OPTISENS ODO2000, Handbook

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5
OPERATION
34
OPTISENS ODO 2000
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5.2.5 Communication protocol
Through the RS485 it is possible to connect the probe to a PC for the data handling and the
calibration and the configuration of the probe. It is necessary to use a RS485 / RS232 or RS485 /
USB converter. It is possible to use the hyperterminal of a PC.
The protocol is product specific and not a standard protocol.
Standard baud rate 9600.
The probe responds to the command with the individual ID or 00.
Do not use the ID 00 if the probe is in a network in order to avoid conflicts.
5.2.6 Sensor mode options
As factory setting the sensor is configured in analog operating mode (current loop 4...20 mA).
This is within the programming: digital mode = 0.
Analog mode
After 8 seconds from switching the sensor on, the current will provide for 8 seconds a fixed
current value depending of the selected scale:
10 mA if selected scale is in ppm as standard setting
12 mA if selected scale is in % air saturation
Transmission mode
Characters ASCII
Bits per characters
start bits 1
data bits 8
parity none
stop bits 1
Errors verifying (just command A) BCC
Commands format
2 byte for ID (01-32)
1 byte for command
n byte data to insert if required by the command
1 byte <cr> (carriage return), end of the command
INFORMATION!
The probe do not answer if configured for different baud rate.