Help Topic - Control Configuration
​
Surface:
The SAM Well Manager RPC controls the well from analysis of surface dynagraph shape using the Pump off setpoint.
​
Downhole:
The SAM Well Manager RPC controls from analysis of the calculated downhole dynagraph using the Pump Fillage setpoint
​
VFD-DH:
When an optional analog output circuit board is added, the SAM Well Manager RPC adjusts the speed of a variable speed drive unit to maintain a desired downhole pump fillage.
​
VFD-SURF:
When an optional analog output circuit board is added, the SAM Well Manager RPC adjusts the speed of a variable speed drive based on the surface dynagraph shape utilizing the Pump Off setpoint.
​
Motor Power:
The SAM Well Manager RPC controls the well using a motor power number calculated from an electric motor speed/torque curve. This number is indicative of the work being done by the prime mover in the early part of the down stroke. This number will decrease as the well pumps off. The SAM Well Manager RPC can be programmed to automatically revert to the Motor Power Control mode when a load transducer/cable failure occurs.
​
Operation Mode
​
Normal:
The SAM Well Manager RPC performs all of the enabled safety and control functions. This mode takes full advantage of the SAM Well Manager RPC capabilities.
​
Host:
The SAM Well Manager RPC ignores load and position input and makes no control decisions. The pump or downtime decision is made by the operator and requires operator intervention
to change. Typical use would be when several wells need to be shut down due to a power company request. A global data message can be sent to all SAM Well Manager RPC units on the radio network to place them in the Downtime-Host Mode well state. The SAM Well Manager RPC controls would stop the wells and keep them down until receiving a command to re-start.
​
Timed:
The SAM Well Manager RPC can be programmed to cycle on/off for user set times. Limited control functions by the SAM Well Manager RPC include peak and minimum load checking. Typical use might be to temporarily operate a well while waiting for one of the signal input end devices to be repaired.
​
Power On delay
When power is applied to the SAM Well Manager RPC, the initial control state is Downtime Power On Delay. The SAM Well Manager RPC delays starting the pumping unit for this number of seconds specified. This feature is included to allow an operator to stagger the startup of pumping units on a transformer bank or distribution line after a power outage.
The default value is 1 second.
​
Start Alert Delay
Digital output 3 on the SAM Well Manager RPC motherboard is dedicated for control of an optional audible or visible start alarm device.
The Start Alert output is held ON (low) for the number of seconds programmed in this field. The SAM Well Manager RPC delays starting the unit until the Start Alert Delay time has elapsed.
​
Minimum Pump Stroke
When a pumping cycle starts, the SAM Well Manager RPC will not perform any dynagraph analysis for this number of initial strokes. Peak and minimum load protection is provided during Minimum Pump Strokes.
​
Many pumping systems may need a few strokes to clear gas or trash from the pump at the start of a pump cycle. As a result, this number should be programmed at a fairly low value because the SAM Well Manager RPC control has very limited capabilities during Minimum
Pump Strokes
The allowed range is 0 to 999, and the default is 3.
​
Downtime Mode
Downtime mode choices are Manual or Automatic. Select Manual initially until the well has pumped a few days to stabilize and the cycle run time stability has been observed.
Manual Downtime (HH:MM)
A user-programmed idle time or downtime after a stop for pumpoff (surface setpoint or downhole pump fillage) or pumping equipment malfunction can be specified. The SAM Well Manager RPC automatically restarts the unit when the specified downtime elapses. Program this value short enough to prevent the fluid level in the well bore from reaching the static fluid level, but long enough to allow good pump fillage for more than the minimum pump strokes. The default value is 5 minutes.
