Document name: Link IO - Manual
Document date: 1.2 10/02/2020
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Software version and software information
This section is providing general information about the software.
When asking for support, you will be asked to provide the information displayed here, to have a first view on
the software release, how the processor is doing, the power supply voltage value and how the permanent
memory has been used.
It is an easy way to simplify support.
In the Information screen you can also find the Unique ID (U.ID), which is necessary to bind a BACnet license
to the device
(see chapter “Licensing BACnet”).
The SW cycle time shows the duration of a software full program cycle. During that time the software would
have read the inputs, run all the functions, auto manual etc and finally write the outputs.
Link IO power supply type can be showing “AC” (alternating current), “DC” (direct current), “PSU” (when a
dedicated super capacitor module is c
onnected and the mains power supply is missing) or “N.A.” (when
there is a problem with the voltage reading internal module).
The voltage reading in AC is the RMS voltage (same as you would read using an external multimeter).
Note: the voltage reading sho
uld be considered as an “indicative” value, expecting an error on the range of
±0.5 V. It is useful though to get an indication on fluctuation or considerably wrong voltage value on the
power supply.
Var writes is used for debug, and it shows the total number of times any permanent memory variable has
been changed. This number is expected to increase in time, but sudden continuous increases might indicate
an excess of permanent memory writings, for example the Set-point of the thermostats from the BMS
supe
rvisor (see chapter “Permanent memory use”).
