Description
Bosch Rexroth VT-HNC100-1-22/W-08-C-0 Digital Axis Controller
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Bosch Rexroth / Indramat |
| Model | VT-HNC100-1-22/W-08-C-0 |
| Product Family | VT-HNC100-1-22/W-08-C-0 |
| Product Type | Digital Axis Controller |
| Hydraulic Axis Version | 1 hydraulic axis |
| Component Series | 22 |
| Installation Type | W — Housing for wall mounting |
| Digital Inputs/Outputs | 8 |
| Bus Interface | CANopen |
| Evaluation Electronics | Without |
| Control Application | Closed-loop hydraulic drive control |
| Controller Architecture | Programmable NC control |
| Maximum Axis Capability of VT- Family | Up to 4 controlled axes, depending on variant |
The VT- family was designed as a programmable NC control platform for hydraulic drives. Bosch Rexroth documentation describes versions for one or two hydraulic axes and configurations with different fieldbus and I/O options. For the specific VT-/W-08-C-0, the ordering code identifies one hydraulic axis, component series 22, wall mounting, eight digital inputs/outputs, and CANopen communication.
Product Introduction
The Bosch h VT-/W-08-C-0 is a digital axis controller intended for closed-loop hydraulic motion control. Unlike a conventional PLC used primarily for sequence logic, the VT- is designed around the requirements of hydraulic axis regulation, combining programmable NC functions with control of hydraulic motion. The specific version is configured for one hydraulic axis, eight digital inputs/outputs, wall-mounted installation, and CANopen communication.
The h VT-/W-08-C-0 is particularly relevant to maintenance of older hydraulic machine-control systems where the controller, feedback devices, valve electronics, and machine application have already been commissioned together. The complete type code matters: other VT- variants may use PROFIBUS DP, INTERBUS-S, SERCOS, different I/O counts, different installation arrangements, or different axis configurations.
VT-HNC100-1-22/W-08-C-0
Application Scenarios & Field Pitfalls — The Engineer’s Perspective
Engineering Pain Point
Hydraulic positioning faults are often blamed on the controller when the actual problem is feedback scaling, valve behavior, hydraulic pressure, wiring, or configuration. Replacing a VT- without preserving the original application parameters can therefore create a second commissioning problem. With this model, the controller should be treated as part of the complete hydraulic control loop rather than as an interchangeable PLC card.
Typical Applications
- Hydraulic machine axes — Closed-loop position and motion control for hydraulic actuators.
- Machine tools — Hydraulic axes requiring programmable NC control.
- Industrial forming and pressing equipment — Controlled hydraulic movement where position and sequence coordination are important.
- Special-purpose machinery — Single-axis hydraulic systems using CANopen for communication with the wider machine-control architecture.
Technical Pitfalls
1. Do not confuse it with a servo drive.
The VT- is a digital axis controller. It provides the control function for a hydraulic axis; it should not be described as the hydraulic power unit, servo valve, or motor drive itself.
2. The CANopen suffix is significant.
For this ordering code, C identifies the CANopen bus connection. Other VT- versions use different communication interfaces. A visually similar controller with PROFIBUS DP or another bus interface is not automatically interchangeable.
3. Component series 22 must be retained.
The 22 portion of the ordering code identifies the component series. Bosch Rexroth’s documentation indicates that component series 20–29 maintain the same installation and connection dimensions, but that does not mean their complete electrical or functional configurations are identical.
4. Eight digital I/O does not mean eight generic PLC outputs.
The “08” portion identifies eight digital inputs/outputs within the VT- configuration. Their actual use belongs to the controller’s hydraulic-axis application and should be checked against the original electrical drawings and software configuration.
5. Evaluation electronics are not included in this version.
The documented coding identifies this unit as without evaluation electronics. Do not assume that a replacement includes the signal-conditioning/evaluation hardware required by another VT-HNC configuration.
6. Feedback configuration must be checked separately.
Hydraulic axis control depends heavily on the position/feedback arrangement. Before replacing the controller, verify the feedback device, signal interface, scaling, machine parameters, and associated valve electronics. Do not infer a specific feedback technology solely from the VT- model number.
7. Configuration backup is important.
The controller is programmable. Before removing an operating unit, preserve the application program, machine parameters, axis settings, I/O assignments, and communication configuration whenever the service procedure permits. A replacement with identical hardware can still require restoration of the correct application configuration.
8. Interface cable is a separate consideration.
The published documentation states that an interface cable is not included as standard and identifies a 3 m cable as a separately orderable item. Confirm the existing programming/service connection before scheduling a replacement or commissioning activity.
Related Products
- Bosch h VT–W-08-0-0 — Closely related one-axis, component-series-22 configuration without the CANopen designation.
- Bosch Rexroth VT–1-22A-W-08-P-0 — One-axis variant with PROFIBUS DP configuration; not automatically interchangeable with the CANopen version.
- Bosch Rexroth VT–1-23-W-08-C-0 — One-axis VT- variant with CANopen and a different component series.
- Bosch Rexroth VT–1-23-W-08-P-0 — One-axis PROFIBUS DP configuration within the VT- family.
- Bosch Rexroth VT–1-23-W-08-I-0 — One-axis configuration using INTERBUS-S.
- Bosch h VT-/W-24-0-0 — Component-series-22 configuration with 24 digital I/O rather than the 8-I/O version.
- Bosch Rexroth VT–2-30/P-I-00/G02 — Different multi-axis VT- configuration; application and hardware architecture must be checked before considering an upgrade.
- Bosch Rexroth SYHNC100 — Related HNC hydraulic numerical-control family used in other hydraulic machine architectures.
- Bosch Rexroth VT-VSPA1 — Analog proportional-valve amplifier family; it serves a different control function from the VT-.
Procurement Note
For a VT-/W-08-C-0 replacement, use the complete type code rather than ordering simply by “VT-.” Verify the one-axis configuration, component series 22, wall-mounted housing, eight digital I/O, CANopen interface, and absence of evaluation electronics against the installed unit.
For used or surplus hardware, inspect the terminal/connectors and housing, then verify power-up behavior and communication before installation. The more important acceptance test is functional: confirm that the controller can be loaded with the required application configuration and communicates correctly with the machine’s CANopen and hydraulic-control architecture.
If the original unit is still operational, back up its configuration before replacement. On legacy hydraulic machinery, recovering the application parameters can be substantially more difficult than sourcing the physical controller itself.
