Advantech Adam 4000 Series User Manual page 141

Caution! When modules measure Thermocouple or RTD input values that are
outside their configured range they will send data that implies input out
of bounds. The next table shows the values that the modules will return,
depending on the configured data format and if the input value falls
under or exceeds the configured range.
Only when modules are configured for Thermocouple or RTD, "input out
of bounds" warning will occur. When analog input modules measure
voltage or current that falls outside the configured range, they will return
the actual measured input!
In the next example the target module is configured for an input range of T/C type J
(Input range: 0 ~ 760 ?) and for a data format in engineering units. The module mea-
sures an input value of 820 °C.
Example command: #D1(cr)
response: >+9999(cr)
By returning a high value, +9999, the module at address
D1h indicates that the measured input value exceeds the
configured range.
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