Reserved Flags
These flags reserved for future use
Bits 1, 2, 3, 4, & 5 = Reserved Flags
Communications Timed Out Flag
If valid communications cease for three minutes, the controller sets the CTO flag. When
communications resumes, the Modbus master should report "Communications Restored" then
reset the CTO flag.
Bit 6 = CTO Flag
Reset Flag
When the Modbus RTU Master sets the reset flag, the EVO/ECM-Modbus RTU acknowledges the
command, then resets. The reset clears (0) the Reset Flag, and sets the Motor On/Offs and Motor
% Outs to their default values
Register 1, High Byte, bit 7 = Reset Flag
Register 2 - Motor 1 - % Out
The equipment manufacturer programs the ECM Motor to operate between a minimum airflow
(or torque) and a maximum airflow. A flow index between 1 and 100 (percent) in this register
controls ECM Motor 1 to the associated airflow.
V = V
index
* (V
max
- V
min
) + V
min
A zero flow index stops the motor. The motor speed can be disabled by clearing the associated
bit in the enable/disable nibble of Register 1.
Integer value from 0 to 100
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