Atlas Copco Power Focus 4000 Configuration and Troubleshooting Manual

Atlas Copco Power Focus 4000 Controller Configuration and Troubleshooting Complete Guide

In bolt assembly for automobiles, aerospace, and general industries, the Atlas Copco Power Focus 4000 (PF4000) controller, with its modular design, rich tightening strategies, and powerful network capabilities, has become the core control platform for the Tensor series of electric tightening tools. Whether it's debugging a new production line or maintaining old equipment, engineers need to have a deep understanding of the programming logic, hardware connections, and fault diagnosis methods of PF4000. This article is based on the PF4000 system manual (software version W7.0), starting from practical applications, systematically sorting out the key points of controller configuration, common function settings, common problems, and event code interpretation, providing on-site engineers with a practical guide that can be consulted at any time.

System Overview and Core Components

PF4000 is the fourth generation tightening controller of Atlas Copco, which supports various tool models such as Tensor S, ST, DS and ETX, and provides two operation interfaces, Compact (compact) and Graph (graphical interface). Its core components include:

RBU (Fast Backup Unit): Software authorization and configuration backup module, divided into gold, silver, copper, X, DS and other levels according to functions. RBU Gold unlocks full functionality (Cell Job, Sync synchronization, etc.), Silver supports multi-level Pset and Job, Bronze only provides basic tightening.

ToolsTalk PF: PC programming monitoring software that enables offline programming, real-time monitoring, and data analysis through RS232 or Ethernet connection.

I/O bus and accessories: Supports accessories such as Socket selector, StackLight, I/O Expander, etc., and expands input and output through a dedicated bus.

When the system starts, PF will check the consistency between the RBU and controller configurations. If they are not consistent, it will prompt the user to choose to use the configuration in the controller or RBU, which provides convenience for quickly replacing the controller.

Pset programming core parameters and strategy selection

Pset (parameter set) is the basic unit of tightening control, including control strategy, torque/angle limits, speed/slope, time parameters, etc. Correctly setting Pset is a prerequisite for ensuring the quality of tightening.

2.1 Control Strategy

PF4000 supports the following main strategies:

Tq con (torque control): only controls torque, suitable for general connections.

Tq con/ang mon (torque control+angle monitoring): After the torque reaches the target, monitor whether the angle is within the limit, used to detect slipping or thread deformation.

Tq con/ang con (AND) and (OR): Simultaneously control torque and angle. The AND mode requires both to meet the standard to be considered OK, while the OR mode requires either to meet the standard to stop the machine.

Ang con/tk mon (angle control+torque monitoring): mainly used in angle control scenarios (such as pre setting before yield point control).

DS con (DS tool specific): Based on current estimation of torque, suitable for scenarios that do not require high-precision sensors.

2.2 Tightening Strategy

One stage: Single speed tightening, simple and fast.

Two stages: high-speed first stage+brief pause+low-speed second stage, which can reduce joint looseness.

Quick step: Two stage without pause, switch speed directly.

Ergo ramp: The second stage of torque increases linearly, providing consistent operating feel and reducing reaction force.

Zoom step: Reduce speed to the set percentage (2%~20%) when approaching the target to improve accuracy.

2.3 Quick check of key parameters

Cycle start [P110]: Define the starting torque value for tightening, usually set at 5% of the maximum torque of the tool (10% for DS tools).

Final target [P113]: Target torque.

Final tq min/max [P112/P114]: Qualified torque upper and lower limits.

Rundown complete [P116]: End torque of the fitting phase, used for angle measurement starting point.

End time [P141]: The waiting time after the torque drops below Cycle complete. If it exceeds the time limit, the cycle is considered to have ended.

Practical advice: For soft joints (such as gasket sealing), it is recommended to use Two stages or Quick steps, and match with a smaller Step 2 speed (such as 20%~30%); Hard joints (metal to metal) can use One stage+Zoom step for quick response.

Autoset and Fast Programming

The Autoset function can automatically adapt to the characteristics of the connector. Operation steps: Click "AutoSet" on the ToolsTalk PF or Graph interface, enter the target torque, and then tighten it 3-10 times. PF will automatically calculate appropriate parameters such as Step 1 speed and Ramp. Note: Autoset is only applicable to torque control strategies (Tq con/ang mon) and requires the tool to be properly connected and calibrated.

Quick programming is suitable for simple scenarios, where only the target torque and joint angle (about 30 ° for hard joints and>100 ° for soft joints) need to be set, and the system will automatically generate Pset.

Job and multi-step tightening management

When there are multiple bolts with different torque requirements on the workpiece, the Job function can be used to combine multiple Psets or Multistage in sequence.

Job creation: Create a new job in ToolsTalk PF, add it from the list of available Psets, and set the Batch size (number of repetitions) for each Pset. Job supports "forced order" (must be in list order) and "free order" (can be chosen arbitrarily).

Job selection source: can be selected through digital input, Ethernet/serial port, recognizer (barcode), or Fieldbus.

Job Monitoring: Through Job Monitor, you can view the current progress, perform operations such as "bypass", "increase or decrease batch count", "restart", etc.

Common problem: If the Job cannot start, check if the Job select source [C201] is set correctly and if the Pset referenced in the Job exists. If the tool is locked and displays "E152 PF locked in Job mode", it means that in the forced sequence job, the current controller is not in the turn to operate and needs to wait or manually select the correct Pset.

Sync synchronization tightening (RBU Gold exclusive)

The Sync function is used for simultaneous tightening of multiple axes (such as wheel bolts), supporting up to 10 axes. Synchronization is achieved through I/O bus for time critical communication, while Ethernet is used for non real time configuration.

Configuration steps: First, connect all participating PFs in Sync to the same cell, set the Sync reference IP [C317] as the IP of the Sync reference controller, and each member points the Sync reference IP to that address.

Sync group creation: In the Sync menu of ToolsTalk PF, add members from the available PF list and select the tightening strategy (Stage or SynchroTork). SynchroTork is designed specifically for PF4000 and can continuously adjust the speed of each axis in the final stage to minimize torque differences.

Operation and diagnosis: Sync reference controller triggers startup, and all members start simultaneously. If some axes are not started, check if the member has set Tool start select source [T200] to "Sync start" and if the I/O bus wiring is intact.

Fieldbus Integration and Data Interaction

PF4000 supports multiple fieldbuses (ProfiBus DP, DeviceNet, InterBus, ModBusPlus, EtherNet/IP, etc.) to achieve efficient data exchange with PLCs.

Configuration focus: Select the bus type in the Fieldbus menu of ToolsTalk PF, set the node address, baud rate, and data length (From PF and To PF). Ensure that the data length and byte order (Motorola or Intel Endian) on the PF side and PLC side are consistent.

Common mapping items: can output status bits such as "Cycle complete", "OK/NOK", "Torque value" from PF; Control commands such as "Select Pset", "Abort Job", "Tool disable" can be written from the PLC.

Troubleshooting: If Fieldbus communication is interrupted, check for node address conflicts, bus terminal resistance settings, and cable shielding layer grounding. Event codes E466 (Fieldbus offline) and E465 (DIP switch position error) are common prompts.

Identifier and Traceability

By scanning the barcode/QR code, it is possible to bind the VIN (Vehicle Identification Number) of the workpiece to the tightening result. PF4000 supports single identifier (Type 1) and multiple identifier (Type 2-4) modes.

Configuration steps: Define the input source (serial port, Fieldbus, Ethernet, etc.), effective character length, and saliency position (i.e. extract key fields from the entire string) in the Identifier menu. Type 1 can be associated with Pset/Job selection, while other types only store additional information.

Work Order: The order in which identifiers are received can be set. If "Tool locked during work order" is activated, the tool will be locked after receiving the first identifier until all expected identifiers have been received before unlocking.

Result storage: By adjusting the memory configuration (Controller → Memory), the number of "Identifier result parts" can be increased (up to 4), and different identifier fragments can be stored in each tightening record.

Tool configuration and maintenance

8.1 Tool parameter calibration

Motor tuning: It must be performed after using new tools or replacing the motor to ensure optimal control circuit. Click on 'Do motor tuning' in ToolsTalk PF's Tool → Maintenance section, then press the tool trigger until complete (approximately 5 seconds). For Sync groups, it is necessary to use 'Sync motor tuning' and trigger from Sync reference.

Open End tool tuning: used for tube nut tools, requires performing "Open End tuning" to measure gear ratio and backlash.

8.2 Maintenance Indicator

PF4000 can record the total number of tightening times of the tool, the number of times since the last maintenance, service intervals, etc. When the set number of times or wear threshold is reached, E502 (service interval expiration) or E504 (wear alarm) is triggered. By using 'Service counter reset', the counter can be cleared and the latest service date can be updated.

8.3 Tool locking mechanism

Tools may be locked for various reasons (see Table 9-3 in the manual), common locking events and unlocking methods:

E102 (Lock on Reject): Due to the NOK result being locked, it can be unlocked by entering the number "Unlock tool" or reversing the direction ring.

E133 (ToolsTalk lock): Disabled by PC software, requires sending the "Enable tool" command.

E137 (Fieldbus Lock): Disabled by PLC via bus, also requires an enable signal.

E206 (Invalid Pset Number): A non-existent Pset has been selected in the job. A valid Pset needs to be re selected or the job needs to be terminated.

Logic Configurator (exclusive to PF4000)

Logic Configurator provides basic PLC functions, which can combine logic gates (AND, OR, XOR, etc.) and function blocks (timers, triggers, counters) to achieve small control logic without the need for an external PLC. For example, when two proximity switches are triggered simultaneously, the tightening cycle is automatically initiated.

When configuring, first create a Logic Set in ToolsTalk PF, define input events (from digital inputs or internal signals), build logic circuits in the grid, and finally map the output to relays or digital outputs. This circuit is evaluated every 100ms or immediately when the input state changes.

Interpretation and Handling of Event Codes

Chapter 25 of the manual provides a detailed list of all event codes. The following are on-site high-frequency faults and response strategies:

Event Code Name Common Cause Handling Measures

E003 Torque measurement may be invalid due to improper programming of the DS tool. The Pset strategy is checked for angle increments in the second paragraph to ensure that there are sufficient angles in the second paragraph

E102 Lock on Reject: NOK tightening occurs and Lock on Reject is enabled. Press unlock input or reverse direction ring

E112 Rehit checks the process flow of the tightened bolts again to avoid duplication

E126 Multistage aborted triggers incomplete viewing of sub information parameters in multi-stage, positioning failure stage

E131 Tool Disconnected Tool Cable Loose or Logic Disconnected Reconnect Tool, or Perform "Disconnect Tool" and Reconnect

E501 Tool Overheated: If the tool temperature exceeds the allowable value, stop the machine for cooling, check for heat dissipation, or reduce the load cycle

E511 Tool size mismatch tool does not match the power level of the controller (such as S7 tool connected to S9 controller). Replace the matching tool or reconfigure the controller type

E870 Sync member registration failure: Check the uniqueness of each member's Channel ID and Sync reference IP in the Sync group if there are duplicate Channel IDs or incorrect IP settings

Memory configuration and data management

PF4000 supports 250 Psets, 99 Jobs, and 5000 result records by default. By using the 'Completely configurable' mode, the number of items can be adjusted (such as increasing the result storage to 9000 and reducing Pset to 100). Changing the storage configuration will clear all existing data (except for IP addresses), so be sure to use the "Store PF to file" backup configuration before operation.