SPA Actuator with Intelli-Motion™ Technology Manual R00
May 2022
Page 33 of 48
4.2.11 StatusBits Tag: Operation and Control Message Feedback
In the input portion of the UDT, there is a tag named StatusBits. This tag accumulates useful bits for process control and
troubleshooting. Many applications can utilize feedback from these status bits to accomplish the control objectives.
Additionally, when programming, the latter half of the status bits are useful in determining if there is something that
needs updating in the control message itself. Bits 0-8 are intended for control feedback, while 8-15 are intended for
control message troubleshooting (bit 8 is for both).
The list of bits that are provided are below:
Table 4-2: StatusBits Description
Bit
Name
Definition
0
VFD Enabled
Enable status
1
Extending
The unit is currently extending (moving)
2
Retracting
The unit is currently retracting (moving)
3
Faulted
The unit has at least one fault
4
At_Extend_Limit
The unit has reached the currently set extend limit
5
At_Retract_Limit
The unit has reached the currently set retract limit
6
In_Position
“GOTO” mode. The unit has reached the received “TargetPosition”
7
Position_Outside_of_Limits
The current position is outside of the active limits
8
CMD_Not_Executed
A control command was not executed
This is usually due to invalid control parameters
9
Limit_Pair_Selection_Invalid
The ActiveLimitPair tag contains an invalid selection
10
Active_Limit_Value_Invalid
One or both of the Extend/Retract limits in the active limit pair is invalid
11
Stored_Limit_Value_Invalid
One or more stored limits are invalid (this bit can be ignored if other limits are
not used)
12
Speed_Invalid
The Speed tag is outside of the set limits
13
Target_Position_Invalid
The TargetPosition tag is not within the stroke length of the unit
14
Control_Mode_Invalid
The ControlMode tag is not a valid option (0, 1, & 2)
15
Speed_Limit_Invalid
The speed limits (Upper/Lower HzLimit) are outside of the unit’s capabilities
