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Table 5-1 Access protection levels
Output
Passkey
No
Low
1
High
1000
Read Only
Factory
XXXX
Write
5.3 Save and Reset
When the required properties are set, you must send a
configuration are saved internally in the flash memory. The Oxygen Optode always reads the
configuration from the internal flash memory after reset and power up.
When changing the Mode and Baudrate property a reset is required for the change to take effect. This
can be done by recycling power or entering the Reset command. At start-up/reset the sensor normally
presents a start-up information string as shown Figure 5-2.
Figure 5-2 Sensor start-up/reset.
5.4 Communication Sleep
If the property Comm TimeOut is set to other than 'Always On' the serial interface will not be activated
after power-up (or the Reset command). Any character will activate the serial interface, but a Carriage
Return (CR or CR+LF), '/' or ';' are often preferred since these character do not interfere with the
command syntax. The serial interface will then be active until a period of input inactivity specified by the
Comm TimeOut value (10 s,20 s,30 s,1 min,2 min,5 min,10 min). The Communication Sleep Indicator,
'%', will be transmitted when the serial communication is deactivated, and the Communication Ready
Indicator, '!' is outputted subsequent to activation. When Comm TimeOut is set to 'Always On' the
communication (and microprocessor) will be kept active all time.
The Communication Sleep Indicator
Carriage Return and Line Feed.
Description
No Passkey needed for changing property
The Passkey must be set to 1 prior to changing property
The Passkey must be set to 1000 prior to changing property
This Passkey value also give read access to factory properties
that usually are hidden
The user have only read access, no passkey needed
Sensor specific code for factory level access
'%'
and the Communication Ready Indicator
page 29 of 93
TD 269 OPERATING MANUAL
OXYGEN OPTODE 4330, 4831, 4835
June 2017
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command to make sure that the new
'!'
are not followed by
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