Aalborg TIO Totalizer I/O Flow Monitor/Controller - Manual (Page 41)

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NOTE: Address 00 is reserved for global addressing. Do not assign,
the global address for any device. When command with global
address is sent, all devices on the RS-485 bus execute the
command but do not reply with an acknowledge message.
,
NOTE: Do not assign the same RS-485 address for two or more
devices on the same RS-485 bus. If two or more devices with the
same address are connected to the one RS-485 network, a
communication collision will take place on the bus and
communication errors will occur.
,
NOTE: Failure to set Full Scale Range parameter in Litr/min equal to
the full scale range (converted to Litr/min) of the device mated to TIO
may cause an erroneous reading and unexpected device behavior.
,
RS-485 address setting is not used for TIO’s with RS-232 interface.
5.3.14 Submenu “Device Calibration”
The Calibration Menu contains the parameters, which must be set according to the
flow meter / controller being used and according to required process conditions.
These values should be changed only by properly trained personnel. Device Analog
Output and Input calibration was performed in the factory and should not be initi-
ated unless recommended by factory personnel. The following settings are avail-
able for “Device Calibration” menu selection:
a) Full Scale Range (Numerical entry)
The Full Scale Range value in Litr/min should be set equal to the full scale
range (converted to Litr/min) of the device mated to TIO. The analog input
and output will be scaled automatically to this value. For example, if Full
Scale Range value set to 10.0 Litr/min and the device is configured for
0-5 Vdc analog input, when 5.0 Vdc is applied to TIO analog input the PI
flow rate will indicate 100.0%FS (if %F.S. units of measure is selected).
b) Low Flow Cut-Off (Numerical entry)
The Low flow cut-off can be selected between 0.0 and 10.0 % of the
full scale range. Flows less than the cut-off value are internally driven to
zero and not totalized. Default value of the “Low flow Cut-Off”
parameter is zero (disabled).