Rev. 1 - 05/10/2021
OPERATING MANUAL
OPERATING MANUAL
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10.4.4 Modbus positive/negative feedback
Depending on the application it could be nec-
essary to invert the feedback behavior.
Through the
Holding Register 31 it is possible
to multiply by -1 the PID error.
When the register is set to 0 -> Error = (R
eference
- M
easure
);
When the register is set to 1 -> Error = (M
easure
- R
eference
).
10.5 Changing the operation mode
Here are shown the actions passing from one operation mode to another one.
ACTION
ACTIONS A
ACTIONS B
Temporary Setting
-> Fixed Setting
The fan must follow the target corresponding to
the value stored the related register.
Fan is put in stop mode and after the data are saved the fan
follows the target corresponding to the value stored into the
related register.
Fixed Setting ->
Temporary Setting
The fan must stop waiting for a new register 66
value.
The fan must stop waiting for a new register 66 value.
Temporary Setting
-> Analog Signal
The fan must follow the target corresponding to
the analog value at the inputs.
Fan is put in stop mode and after the data are saved the fan
follows the target corresponding to the analog value.
Analog Signal ->
Temporary Setting
The fan must stop waiting for a new register 66
value.
The fan must stop waiting for a new register 66 value.
Fixed Setting ->
Analog Signal
The fan must follow the target corresponding to
the analog value at the inputs.
Fan is put in stop mode and after the data are saved the fan
follows the target corresponding to the analog value.
Analog Signal ->
Fixed Setting
The fan must follow the target corresponding to
the value stored the related register.
Fan is put in stop mode and after the data are saved the fan fol-
lows the target corresponding to the value stored into the related
register.
Increasing the fan speed
The probe voltage
increases
The probe voltage
decreases
