Xylem Aanderaa 4296, Operation Manual, Page: 70 / 109

Page 70 June 2022 – TD 320 OPERATING MANUAL – TURBIDITY SENSOR 4296
•
The ENUM property settings are case sensitive. E.g. “ Set Mode(AiCaP) ” Here AICAP will
result in argument error.
• A valid command string is acknowledged with the character ‘ # ’ while character ‘ * ’ indicates an
error. Both are followed by Carriage Return/ Line Feed (CRLF).
• For most errors a short error message is also given subsequent to the error indicator.
• There are also special commands with short names and dedicated tasks, as save , reset , and
help .
• All names and numbers are separated by tabulator spacing (ASCII code 9).
• The string is terminated by Carriage Return and Line Feed (ASCII code 13 & 10).
Note! Losing power during the flashing process can cause corruption of vital settings, such as
coefficients, serial number, model number etc. If losing settings, contact AADI Service department
for new setting file for the specific sensor with further instructions.
5.6
Passkey for write protection
To avoid accidental change of the sensor configuration, most of the properties are write-protected.
There are five levels of access protection, refer Table 5-1 .
A special property called
Passkey
must be set according to the protection level before changing
the value of properties that are write-protected, refer Table 5-1 . E.g.:
Set passkey(1000)
Output Passke
y
Description
No No Passkey needed for changing property
Low 1 The Passkey must be set to 1 prior to changing property
High 1000
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
Read Only The user have only read access, no passkey needed
Factory Write XXXX Sensor specific code for factory level access
After a period of inactivity at the serial input, the access level will revert to default. This period
corresponds to the
Comm TimeOut
setting, or 1 minute if the
Comm TimeOut
is set to
Always
On .
Table 6-1 Access protection levels