Instruction Manual
D103460X012
D3 Valve with easy-Drive Actuator
October 2017
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A.2.5 Overspeed Condition
The drive speed was detected as being over the speed 3300RPM. This fault latches and needs to be reset.
A.2.6 Calibration Span Not in Legal Range
Following a calibration the detected mechanical travel was detected as being too short for the valve type. This fault
latches and needs to be reset.
A.2.7 Fault in NV Memory – recovered settings
This fault is similar to Fault in NV Memory but is different in that the settings were recovered, however it is possible the
fault was due to a setting being changed during a power cycle. The settings need to be validated before valve
operation.
A.2.8 Communications Timeout
This flag is set after a timeout or loss of valid communications, it will be cleared if communications is reestablished
with the valve controller. If this flag is set and the control demand is set to be taken from the Modbus then the valve
will be commanded to the ‘Loss of communications position’ in setting accessed at Modbus register 40034.
A.2.9 Valve was Shutdown while Moving
The valve was actuating while power was removed, the position information may be unreliable. Command valve to 0%
to assure position information is accurate.
A.2.10 Valve Span Calibrated
The valve is calibrated.
A.2.11 Valve Position Controller Active
The valve is being actively controlled to go to a demanded position. The speed and position control loop logic is
setting the pwm and direction demands to the ValuDrive motor.
A.2.12 Analog Input Below 3mA/0.75V
The analog input is below a set threshold of 3mA. If since being powered up this level has been met the flag ‘Analog
input initialized’ will be set. If the control source is the analog input and this flag is set then the valve will be
commanded to actuate to the ‘Loss of control input’ position.
A.2.13 Motor Overspeed Coast Condition
The drive speed was detected as being over the speed 2500RPM. The flag is cleared if the speed falls below the coast
threshold level. This flag is used purely as a diagnostic.
A.2.14 Modbus Command Initialized
The system has received a command to the Position demand register since being powered up. If Modbus is the
selected control mode the valve will be commanded to this position after the startup period.