FrSky ARCHER PLUS SR10+ Receiver Instruction Manual

Introduction

The Archer line of receivers has been enhanced with the new Archer Plus Series. These receivers feature an enhanced anti-RF-Interference capability for more solid RF performance, building upon existing anti-interference features. They support both ACCESS and ACCST D16 modes, with smart RF protocol matching during binding. The Black-Box function preserves basic flight data like power and signal status.

The Archer Plus SR10+ is a gyro-stabilized receiver equipped with a built-in 3-axis gyroscope and 3-axis accelerometer. It supports multiple flight modes (Auto-level, Stabilization, Knife-Edge, etc.) and configuration methods. The SR10+ offers 10 configurable channel ports, each assignable as PWM, SBUS, FBUS, or S.Port.

The SR10+ provides full-range signal strength with dual detachable antennas for optimal reception. It can function as a primary receiver in a redundant setup by setting a port as SBUS In. With the FBUS protocol, it seamlessly pairs with telemetry devices like XACT servos and ADV Sensors, simplifying setup.

Overview

The receiver dimensions are 46.5mm (Length) x 26.3mm (Width) x 14.7mm (Height). It features 10 configurable channel ports (CP1-CP10), S.Port, AIN2 (for external voltage measurement up to 35V), and two 2.4G antennas. CP1 can be configured as PWM, SBUS Out (supporting 16CH/24CH mode), FBUS, S.Port, or SBUS In.

Operating Specifications:

• Operating Voltage Range: 3.5-10V
• Operating Current: <100mA @ 5V
• Control Range: Full range* with telemetry (*Full Range: >2km, may vary based on local conditions)
• Voltage Measurement Range via AIN2 (External device): 0-35V (Battery Voltage Divider Ratio: 1:10)
• Compatibility: FrSky 2.4GHz ACCESS / ACCST D16 capable transmitters

Features

• Enhanced Anti RF-Interference capability with more solid RF performance
• Smart-matched ACCESS & ACCST D16 modes
• Supports basic Black-Box function
• Built-in 3-axis gyroscope and 3-axis accelerometer sensor
• Multiple flight modes and configuration tools (ETHOS, LUA scripts, etc.)
• 10 configurable channel ports (PWM, SBUS, FBUS, or S.Port)
• Supports signal redundancy (SBUS In)
• Full control range with telemetry (S.Port or FBUS)
• Anti-interference capability in the spark-ignition process
• Over-The-Air (OTA) FW update
• External battery/device voltage detection

Specifications

Working State LEDs

The receiver has Green and Red LEDs for status indication:

• Status: REG
  • Green LED: On
  • Red LED: Flash
• Status: Register successfully
  • Green LED: On
  • Red LED: Off
• Status: Bind
  • Green LED: Flash
  • Red LED: Off
• Status: Work Normally
  • Green LED: On
  • Red LED: On
• Status: Failsafe
  • Green LED: Off
  • Red LED: On

Yellow LED State (Calibration of Accelerometer): Indicates calibration is in progress or exceeding limits (0.9G, 1.1G).

Blue LED State (Self-check): Indicates self-check is in progress, completed, or detecting max/min channel values.

Basic Step Guides

1. Model creation & Receiver binding
2. Ensure stabilization is enabled & Calibrate the gyroscope sensor of the device
3. Servo connection & Build the stabilization device to the model
4. Set up the receiver channel and radio switches
5. Determine the [Wing Type] & [Mounting Type]
6. Check the stabilized channel outputs of the receiver in the Auto-Level mode
7. Check the stick control of the transmitter in the manual mode
8. Self-Check of the receiver
9. Failsafe setting

Registration & Automatic Binding

Follow these steps to finish the registration and binding procedure:

1. For TANDEM X20 as an example: Enter the Model menu, select RF System, turn on the internal module, select status [ON] and ACCESS. Determine antennas (internal/external) and choose RF power. The ACCESS receiver can be registered at this moment. (Note: Registration is not required for ACCST D16 mode binding.)
2. Connect the battery to the receiver while holding the button on the receiver. The RED and GREEN LEDs will turn on, indicating [Reg] status.
3. When the Register ID, RX name, and UID are displayed, click [Register]. The RED and GREEN LEDs will flash, and the transmitter will display [Registration OK].
4. Power off the receiver.
5. Move the cursor to select one of the 3 receivers and press [Bind].
6. Connect the battery to the receiver.
7. Select the RX; the GREEN LED will stay lit, and the transmitter will display [Bind successful].

Note: Once registered, the button is not needed for binding in ACCESS mode.

Gyroscope Sensor Calibration

Ensure the SxR stabilization function is enabled in the [Device Configuration] → [SxR] menu by setting [SxR Enable] to [On].

Move to the [SxR Calibration] tool to calibrate the gyroscope sensor. This calibration is crucial before mounting the receiver into the model. Place the receiver on a flat surface and follow the on-screen prompts.

Calibration Steps:

1. Place the receiver with the LOGO sticker side facing upwards on a desktop.
2. Navigate to the [SxR calibration] tool on the radio and select "click to confirm". The yellow LED will flash until it lights off, indicating the sensor calibration is in progress.
3. Calibrate all six surfaces of the receiver by placing it in the specified orientations (e.g., flat, vertical, upside down, pins up/down). Ensure the values for each axis (X, Y, Z, Mod) are approximately 1.000 (deviation ±0.1).
4. Calibration is complete when all steps are finished successfully.

Required Orientations for Calibration:

• Flat, LOGO sticker side up
• Flat, LOGO sticker side down
• Vertical, pins up
• Vertical, pins down
• Side view, pins to the right
• Side view, pins to the left

Servo Connection & Build the Stabilization Device to the Model

Connect the servos to the receiver ports according to the Channel List. Ensure the receiver antenna is oriented towards the nose of the model, with the receiver pins facing backward.

Channel List

Gyro Gain Adjustment: CH9 can be used to adjust gyro gain. When CH9 is at the center, gain is zero. Gain increases as the value increases up to ±100% for maximum gain.

Attentions: CH1-CH8 should be connected to the corresponding servos. CH9-CH12 are not marked on the diagram; CH9 edit example: setting CH9 at Weight 50 and offsetting 50 allows a pot/slider to work normally.

Set Up the Receiver Channel and Radio Switches

Refer to the Channel List to set up channels and switches. The switch settings for CH9-12 shown in diagrams are for reference.

Navigate to the [SxR] tool to determine the [Wing Type] and [Mounting Type].

Inspection of Flight Attitude

For flight safety, it is strongly recommended to check the compensation direction of the model. Activating auto-level mode produces strong deflections on AIL and ELE to check aileron and elevator response. Activating Knife-edge and Hover modes similarly affects the rudder.

• When the plane is rotated left or right (Roll), ailerons should have correcting actions as illustrated.
• When the plane is rotated up or down (Pitch), elevators should have correcting actions as illustrated.
• When the plane is rotated left or right (Yaw), rudders should have correcting actions as illustrated.

After changing compensation direction, re-check on the actual model. If compensation direction is incorrect, reverse the corresponding channel.

Gain and Offset Configurations of Flight Modes

The receiver allows configuration of gain and offset for various flight modes:

• Stabilize Gain (Ail, Ele, Rud)
• Auto Level Gain (Ail, Ele)
• Hover Gain (Ele, Rud)
• Knife-Edge Gain (Ail, Rud)
• Auto Level Offset Angle (Ail, Ele)
• Hover Offset Angle (Ele, Rud)
• Knife-Edge Offset Angle (Rud, Ail)

Self-Check

Perform a self-check to ensure proper operation:

1. Set the throttle to 0 and keep other channels centered.
2. In [Device Config], navigate to the [SxR] tool and turn on [Self Check]. The blue LED will light up.
3. Once the blue LED starts flashing, calibrate the maximum travel of stick channels (excluding throttle).
4. Upon completion, the LED turns off, and servos will react left and right, indicating successful calibration.

Note: Ensure [SxR] function is enabled before performing Self-Check. Exit and re-enter the [SxR] tool after enabling [SxR Enable] for the [Self-Check] function to become available.

How to Set the Flight Modes

The SR10+ supports multiple flight modes. The default mode is Quick Mode, which offers stabilization, auto-level, and manual (six-axis off) modes, configurable via CH10. An Emergency mode for auto-level is available via CH12.

Quick Mode: Does not include Knife Edge or Hover modes. CH11 is not used in Quick Mode.

Flight Mode Assignment: Available flight modes can be assigned to CH10 using a three-position switch.

Wing/Tail Type Configuration:

• When Delta wing/Flying wing is selected, the transmitter signal for AIL (CH1) and ELE (CH2) should be without active mixes. SR10+ will automatically mix these signals.
• When V-tail type is selected, the transmitter signal for ELE (CH2) and RUD (CH4) should be without active mixes. SR10+ will automatically mix these signals.

Mode Definitions:

• M: Represents a neutral signal period (1500µs).
• H: Represents the time of required signal change to activate the mode (50µs).
• Off: SR10+ transmits received commands without compensation.
• Stabilization: Compensates for external forces (e.g., wind) to enhance stability on three axes (Pitch, Roll). CH9 can adjust gyro gain.
• Automatic Level: Makes the model return to a level orientation on AIL and ELE channels after sticks are released to neutral. RUD channel operates in stabilization mode only.
• Hover: Keeps the model nose-up using RUD and ELE channels. AIL controls rotation, THR adjusts altitude. AIL channel works in stabilization mode only.
• Knife-Edge: Rolls the plane to a specific side using RUD and AIL channels. ELE controls steering, THR/RUD maintain altitude. ELE channel operates in stabilization mode only.

Over-The-Air (OTA) Function (ACCESS Mode)

To update firmware via OTA:

1. Go to [File manager], select the FW, press Enter, and select [Flash RX by int.OTA].
2. Power on the receiver, select the RX, go to [ENTER], and complete the flash process. The transmitter will display [Success].
3. Wait 3 seconds for the receiver to work properly.

Notes:

• Do not perform binding operations nearby while firmware is upgrading.
• Update firmware after the receiver has been registered (OTA).

Range Check

A pre-flight range check is essential to prevent signal loss due to environmental factors. In Range Check mode, the RSSI at 150m is typically around 45-50.

1. Place the model at least 60 cm (2 feet) above non-metal contaminated ground (e.g., a wooden bench). Position the receiving antenna vertically.
2. Enter the ETHOS system, navigate to "RF System", select "RANGE" mode, and press Encoder. This reduces the effective distance to 1/30.

How to Switch S.Port/SBUS OUT/SBUS IN/FBUS

Enter the [Set] menu for the receiver and select the desired protocol (FBUS, S.Port, SBUS Out, SBUS In) for the channel ports.

How to Switch SBUS Channel Mode

Enter [RX Settings], click [SBUS], and select either SBUS-16 mode or SBUS-24 mode.

How to Set Failsafe

There are three failsafe modes:

• No Pulse Mode: On signal loss, the receiver outputs no pulses on any channel. Select this mode and wait 9 seconds for it to take effect.
• Hold Mode: The receiver continues to output the last known positions before signal loss. Select this mode and wait 9 seconds for it to take effect.
• Custom Mode: Allows pre-setting specific positions for each channel upon signal loss. Navigate to the desired channel, press Encoder, select Custom mode, then rotate the Encoder to set the failsafe for each channel. Short-press Encoder to finish. Wait 9 seconds for it to take effect.

Notes:

• If failsafe is not set, the model will retain its last working status, potentially causing damage.
• If failsafe is disabled on the RF module side, the receiver's failsafe settings will be applied.
• The SBUS port does not support No Pulses mode and always outputs a signal. Set "Hold" or "Custom" mode for the SBUS port.

General Notes

FrSky continuously improves its products. Visit the FrSky website (www.frsky-rc.com) for the latest firmware updates and manuals.