230-04A4

Access Machine Parameters

Press MOD key (if enabled), enter code, navigate to All Parameters > Handwheel section, or directly access MP7210 parameters. On locked systems, contact machine builder for MOD access.

Modifying machine parameters requires authorization and can affect machine safety. Document all original values before making changes.

Review MP7210.x Assignments

Check MP7210.0, MP7210.1, MP7210.2 for each handwheel. Each parameter contains a bitwise axis assignment (e.g., bit 0=X, bit 1=Y, bit 2=Z). Verify axis %2 from the alarm message has a single, valid assignment without duplication across handwheels.

MP7210.0 corresponds to HR1, MP7210.1 to HR2, etc. Value is decimal representation of binary bits: X=1, Y=2, Z=4, A=8, B=16, C=32. For X+Y+Z access, enter 7 (1+2+4).

Correct Assignment and Reboot

If axis assignment is incorrect, modify the appropriate MP7210.x parameter to include the axis bit. Save parameters and perform a control reboot (Ctrl+Alt+Del on TNC640, or power cycle on older controls) to activate changes.

Control reboot will terminate any active machining program. Ensure machine is in safe state before rebooting.

Verify Physical Handwheel Count

Count the actual number of handwheels connected to the machine. Check HRA handwheel adapter connections on the back of the control unit for wired handwheels, or verify paired wireless HR550FS units.

HRA adapters typically support up to 3 handwheels. Each handwheel requires a separate input channel on the HRA interface.

Check MP7201.0 Parameter

Navigate to MP7201.0 (Number of Handwheels) in MOD mode. This value should match the physical handwheel count exactly. Typical values are 1, 2, or 3.

Setting this value higher than physically connected handwheels creates undefined configuration states.

Adjust and Clear Subsequent Assignments

Set MP7201.0 to correct value. If reducing the number, also clear MP7210.x assignments for removed handwheel positions (set to 0). Save parameters and reboot control.

After changing MP7201.0, review all MP7200 series parameters to ensure consistency throughout the handwheel configuration block.

Identify Physical Handwheel Models

Check the model label on each connected handwheel. Common types: HR150 (100 pulses/rev), HR410 (portable, 100 pulses/rev), HR420 (100 pulses/rev with display), HR550FS (wireless, 50 pulses/rev).

HR550FS wireless handwheels have distinctive battery compartments and pairing buttons. Older HR models are typically wired with 15-pin or 26-pin connectors.

Verify MP7202.x Settings

Access MP7202.0, MP7202.1, MP7202.2 for each handwheel position. Set correct type code: typically 0=HR150, 1=HR410, 2=HR420, 5=HR550FS. Consult your specific TNC control manual for exact type codes as they vary by control generation.

Incorrect handwheel type settings can cause erratic axis movement or incorrect scaling when handwheel is operated.