Servo Control Modules | Allen-Bradley 1746-HSRV

The Allen-Bradley 1746-HSRV is a single-axis closed-loop motion control module engineered for the SLC 500 programmable controller platform. Operating in local chassis slots managed by SLC 5/03, 5/04, or 5/05 processors, the module generates programmable analog velocity commands up to ±10 VDC to coordinate single-axis positioning tasks with compatible AC or DC servo drives and amplifiers.

Motion Profiles and Processing Modes

The module executes standalone motion sequences and multi-segment profiles without relying on continuous position loops from the central CPU. It supports execution of up to 16 distinct motion profiles containing as many as 32 individual segments, accommodating complex speed ramps, hold times, and target positions. System interaction is governed through dual operational modes: Configuration Mode for setting feedback scaling, velocity limits, and acceleration profiles, and Command Mode for initiating motion blocks and reading active position data.

Field I/O and Peripheral Interfaces

Equipped with discrete control channels, the module features 3 digital inputs rated at 24 VDC for home, drive ready, and overtravel limit sensing, along with 1 digital output rated at 24 VDC for drive enable signaling. Quadrature feedback from incremental optical encoders is decoded directly onboard to maintain closed-loop position monitoring. The module derives logic power from the SLC 500 backplane chassis, but requires external power connections to drive peripheral control signals and field devices.

Technical Specifications

Frequently Asked Questions

Q: Can the 1746-HSRV servo control module be placed in a remote I/O rack? A: No, the 1746-HSRV must be installed in a local SLC 500 chassis containing an SLC 5/03, 5/04, or 5/05 processor to maintain real-time backplane command updates.

Q: What output signal does the 1746-HSRV generate to drive servo amplifiers? A: The module outputs a programmable analog velocity command voltage up to ±10 VDC with configurable acceleration and speed limits.