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Description
Application Scenarios
A Midwest metal fabrication shop operated a CNC tube bender controlled by an SLC 5/04 processor. The original single-axis positioning system relied on a mechanical cam and limit switches, resulting in inconsistent bend angles as the machine aged. Rather than replacing the entire control platform, the maintenance team installed a 1746-HSRV module in the spare I/O slot closest to the processor, wired it to the existing servo drive, and programmed absolute positioning moves using RSLogix 500. The 1746-HSRV enabled the operator to switch between bend profiles via recipe selection, reducing setup time from 45 minutes to under 5 minutes and eliminating the cam wear that had plagued the line for years.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1746-HSRV |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Category | Single-Axis Servo Control Module |
| Product Line | SLC 500 (1746 Series) |
| Compatible Processors | SLC 5/03 FRN 5.0+, SLC 5/04, SLC 5/05 |
| Module Width | Single Slot |
| Backplane Current (5V DC) | 300 mA |
| Input Frequency | 300 kHz @ 0° quadrature error |
| Update Time | 2 ms (module); 0.2 ms typical independent of scan |
| Step Response | 100 ms in / 2.5 ms out |
| Analog Output | ±10V DC velocity command (programmable limits) |
| Fast I/O | 3 inputs (24V DC), 1 output (24V DC) |
| Position Range | 32-bit absolute position |
| Operating Temperature | 0°C to +60°C (+32°F to +140°F) |
| Weight (approx.) | 0.43 kg (15 oz) / 0.60 kg depending on source |
| Lifecycle Status | Mature / Discontinued – supported by repair and remanufactured stock |
Technical Principles and Innovative Values
- Innovation Point 1: Scan-Independent Motion Execution. Once the SLC processor initiates a motion block, the 1746-HSRV executes the profile independently of the processor scan time . This means complex multi-axis moves can complete without being delayed by logic scan variations, ensuring consistent motion quality even as the main program grows.
- Innovation Point 2: 32-Bit Absolute Position Control. The 1746-HSRV tracks absolute position over a 32-bit range, providing precise repeatability for applications requiring exact positioning over long travel distances . Homing operations automatically reset the absolute position when the module detects an encoder marker, limit switch, or both, simplifying recovery after power loss.
- Innovation Point 3: Blended Motion Profiles. The module supports blended moves consisting of two to thirty-two segments stored as a series of absolute moves in module memory . These profiles can be executed repeatedly, with other move or homing operations performed between profile runs — ideal for complex machining or handling sequences.
