Installation and Operation Manual
X-DPT-DeviceNet-SLA5800-SLAMf-Series-RevB-PC-eng
Part Number: 541B200AAG
March, 2015
69
Section 5 - Detailed Configuration
Brooks DeviceNet PCs
5.8.1.3. Note: Override
The following table outlines the valid actuator override types.
Table 5-70 Override
Value State
Description
0
Normal
Actuator is under normal operational control
1
Closed
Actuator is driven fully closed (Value[6] = 0% or 0 Counts)
2
Open
Actuator is driven fully open (Value[6] = 100% or 24576 Counts)
3
Hold
Actuator is held to last updated analog output signal prior to assertion of override
4
Safe State
Actuator is driven to the condition specified by the Safe State[21] attribute
5.8.1.4. Note: Value
To interpret the value of this attribute, it is important to understand the
following terms:
Operational Range:
This is the range that is reported by Value[6]. The operational range of the
actuator is full range that the actuator can be driven to move. This
corresponds to Value[6] values of 0 to 100% (0 to 24576 Counts).
Nominal Control Range:
The nominal control range is a set of values that the actuator is driven to that
maps directly between 0 Flow and maximum rated flow for the device. This
set of values is a sub-range within the large operational range of the
actuator. Note that the actuator value in a pressure controller is such that the
device controls the flow required to maintain a setpoint or increase or
decrease pressure to a new setpoint. Example, the nominal control range for
a 0 to 100 SCCM device flowing nitrogen could be as follows:
at 0 SCCM Actuator = 20% (4915 counts)
at 100 SCCM, Actuator = 30% (7373counts)..
