Separate the Enable and Ready Failures
The reported Cincinnati Arrow with Acramatic A2100 control first showed a spindle enable timeout: CR6 did not energize, the VFS5 activation LED remained off, and no red drive indicator was present. After the hard drive was changed, CR6 energized and the control sent the drive-enable signal. The symptom then changed: commanding spindle motion produced a red fault, while the other axes moved, and the control reported that enable had been sent but ready had not been received.
| Observed state | Supported interpretation | Next check |
|---|---|---|
| CR6 off; activation LED off | Enable is not reaching the active state | Inspect the A2100 drive-enable output |
| Enable sent; ready absent | The drive does not complete the enable/ready handshake | Read the VFS5 alarm status |
| Red fault on motion command | The remaining problem is drive-side or in its interface | Capture the detailed fault when motion is requested |
Inspect the A2100 I/O State
The A2100 does not present a conventional ladder view. Its service/programware area exposes cycle statements and I/O states. Use that view to determine whether the control commands drive enable when machine power is turned on.
- Open the service and programware area.
- Select the I/O board view.
- When prompted for a slot, press Enter to open the basic input/output display.
- Page to the outputs and locate the drive-enable signal.
- Observe whether that output changes at machine power-on, then compare it with CR6 and the VFS5 activation indication.
Interpret sinking and sourcing correctly when tracing the interface; parts of the A2100 and VFS5 use sinking logic rather than sourcing logic. Confirm signal state from the applicable wiring documentation instead of assuming that a measured high level always means active.
Check the VFS5 Before Replacing More Hardware
Inspect the VFS5 face for alarm-state indicators and note the exact change when spindle motion is requested. Motion Link software can read the alarm status stored in the drive; this is important because the available alarm outputs are described as generic and may not identify the detailed cause without the software or drive manual.
If detailed software is unavailable, check the alarm relays and measure the DC bus using the approved drive procedure. The evidence states that the bus should be close to 330 VDC. Treat a different value as a diagnostic observation, not proof of a specific failed component. The reported hard-drive change restored CR6 and the enable command, but the later red fault and missing ready signal show that it did not resolve the complete spindle problem.
FAQ
Why does an A2100 report that spindle enable was sent but ready was not received?
The control output has reached the enable state, but the VFS5 has not returned ready. Read the drive alarm status at the instant a spindle command produces the red fault.
How do I view the drive-enable output on an Acramatic A2100?
Open service/programware, select the I/O board, press Enter at the slot prompt, and page to the outputs. Monitor the drive-enable signal during machine power-on and compare it with CR6.
What DC bus voltage was specified for the VFS5 check?
The supplied evidence specifies a value close to 330 VDC. Measure it only under the applicable drive safety procedure, and use the result with the alarm-relay and drive-status checks.
