Month: July 2025

Wiring Notes

• Ground cable shields at one end only.

• Isolate signal wiring from power lines and sources of electrical noise.

• Do not exceed 10V dc on any input terminal.

• Outputs +Exc, +T/R, and -T/R must have a minimum load of 1K ohms.

referenced to analog common.

Module I/O

Inputs

The module has two independent channels that you configure to process 

signals from machine sensors (default) or from the SLC output image table 

across the backplane.

Outputs (Summary Data)

The module processes a frame of summary data for each molding cycle, 

and alternately makes available the previous frame for display. It does this 

for channels 1 and 2. Your ladder logic can read summary data from the 

module’s M0/M1 files. You can observe summary data displayed on a PC 

equipped with DARTWin software. The PC must be linked to the module 

with DARTNet network from RJG Technologies, Inc.

Configure the SLC Processor (including I/O, M0/M1, and G file)

This procedure is based on RSLogix500 programming software, version 

2.0 or later. For other software, the procedure may vary.

Configure the SLC processor, I/O, size of M0/M1 files, and G file offline 

to match your system layout. 

1. With the File pull-down window, open the ladder file associated with 

this project, or create a project (ladder file) for it.

2. If you have not already done so, select the Controller Properties icon 

and launch it. Then select/enter the type of SLC processor.

3. Select the I/O Configuration icon and launch it. Then select/enter:

A. Slot number in the I/O chassis for this module

If using this module in a Pro-Set 200 Injection Control System, 

assign this module to slot 7.

B. Module ID (12935), entered under “Other” in the I/O Module window.

Important: When you enter the module ID, the processor automatically 

reserves the required number of I/O image table words. The location of 

those words in the I/O image table is determined by the module’s slot 

location in the I/O chassis. Slot location is a required addressing unit. 

For example, I:e.6 locates the 6th word in the block of input image table 

words assigned to the module in slot e that you entered in A, above. 

C. If you have not already done so, enter the size of I/O chassis and the type of power supply.

4. Select the Adv Configuration icon and launch it.

Then select/enter:

A. Length of M0/M1 files at 106 words, each (listed in section 11).

B. Length of G file at 94 words.

What the module does

The module processes and extracts cyclic injection molding data for 

display on your PC, and responds to alarms that you set to monitor 

critical molding parameters. 

When used with the Pro-Set 200 Injection Molding Control System, 

the module helps you:

• achieve a quicker setup time to obtain optimum part quality

• maintain that quality over the production run

The module and associated DARTWin software help you to set up the 

injection molding machine for optimum performance. Then you set 

alarm limits on critical parameters to detect deviations while making 

parts. You can also set a critical mold pressure to transfer the injection 

process each machine cycle. 

The module is designed for use with the SLC 5/03 (or later) processor. 

You program it to interface with the injection molding machine. The 

module has two independent channels to accept analog pressure inputs 

from sensors or from the SLC processor across the backplane. It 

returns alarm signals and processed molding parameters to the SLC 

processor for your application programming and to your PC for 

graphic display. We show the module in a typical Pro-Set 200 system.

Digital and field circuits are optically isolated. 

All modules feature isolation between digital and field circuits, resulting in increased

noise immunity and limited damage to your system due to an

electrical malfunction of the field wiring.

Self-lifting field-wire pressure plates cut installation time. 

Wiring terminals have self-lifting pressure plates to secure two #14 AWG

field wires.

Removable terminal blocks help ease the wiring task.

Removable terminal blocks allow you to replace the module without rewiring it

(not available on all modules).

Removable terminal blocks are color coded for quick identification.

A matching color band is also provided on the front of the module to

assist in matching the terminal block to the module.

Barrier-type terminal blocks provided on all modules. 

Each terminal block features a barrier on three sides of each terminal to help

prevent accidental shorting of field wiring.

Self-locking tabs secure the module in the chassis.

No tools are necessary to install or remove a module from the chassis. To install

a module, you slide it into the chassis until it latches in place.

Features and Benefits

Select I/O modules to exactly match your application.

Combinationmodules allow you to have inputs and outputs in a single slot for efficient use of your chassis space.

Expand the I/O capacity of your fixed controller system.

Two discrete I/O modules can be added to the fixed controller’s 2-slot expansion

chassis increasing the flexibility of the system.

All relay contacts are Silver Cadmium with Gold overlay.

Gold plating resists oxidation and tarnishing resulting from non-use.

Silver Cadmium acts as an excellent conductor.

High-density 32-Point DC I/O and fast response DC inputs are available.

These modules allow you to apply the SLC 500 processors in a broader spectrum of control applications.

LEDs indicate the status of each I/O point.

Assisting you in troubleshooting, LEDs illuminate when the proper signal is received

at an input terminal, or when the processor applies power to an output terminal.

Terminal identification diagrams on each module.

Terminal identification diagrams are located on each module making terminal

identification easier.

An acceleration of 2 – 2500 pulses per second2 trapezoidal velocity profile. 

The thermal dissipation of the controller reaches a 1.5 Watts for both minimum and maximum. 

The application interfaces hold a stepper motor driver with a speed range of 1 – 250.000 pulses per second.

The 1746-HSTP1 module’s storage temperature is -40-85 Deg. Celsius and 0-60 Deg. 

Celsius operating/inlet air temperature. An altitude that is up to 200 meters with a relative humidity 5 – 95% non-condensing.

The Allen-Bradley 1746-HSTP1 is an intelligent module that is compatible with the SLC 500 controller platform. 

This module is a Stepper Control Module, used with encoder inputs to provide accurate control of stepper motors in motion and positioning control.

This particular module is compatible with Allen-Bradley fixed style SLC product with Two (2) Slot expansion and modular style 

processors such as SLC 5/01. SLC 5/02. SLC 5/03. SLC 5/04 and SLC 5/05 controllers. 

Via the 1746-ASB module, this intelligent module may also be used in larger Programmable Logic Controller (PLC) systems.

The integrated stepper motor controller’s absolute positioning count may reach over +/- 8.000.000 counts at pulse train velocities of 250 kHz. 

This module does not implement a closed loop control instead, the encoder feedback is used to verify movement of the axis to the correct position based on the user program.

Description

The Allen-Bradley 1746-HSTP1 is a stepper controller module. 

A single-slotted module capable of operating a wide variety of SLC 500 series processors. 

With a differential encoder motion that is programmable for more than 8.000.000 counts of absolute position.

The 1746-HSTP1’s feedback hardware adapts up to 250 kHz of any frequencies. 

It can provide 250 kHz pulse train output for micro-stepping applications. 

It uses loopback diagnostics and differential incremental encoder feedback devices. 

The 1746-HSTP1 provides a differential feedback that interfaces directly to +5 or +15 V encoders. 

The module has a 5″ x 2″ x 6″ (13 cm x 5 cm x 15 cm) estimated dimension and weighs 15 oz (0.43 kg) approximately. 

Programmable modes of operation reduce the need for setting a DIP switch.

The 1746-HSTP1 module has a 200 mA back-plane current at 5 volts and 90 mA at 24 volts. 

It has a 5V DC differential encoder or 12-24V DC single-ended auxiliary inputs. 

It provides a digital output for the translator with a 4 ms module update time. 

The controller module has a 7 – 30 mA at 5V DV pulse train switching. 

This stepper controller module interface directly to encoders with differential feedback with +5 or +15V signal. 

It is also compatible with transistors with differential input translators, single-ended TTL and interface for opto-couplers.

This module does not include DIP switches for setting and configuration.

The module provides quick operational diagnostics through its embedded LED indicators that provide feedback regarding programming errors, 

normal and abnormal operation and a faulted system. 

This module also has built-in loop diagnostics that monitors the pulse train commands provides to the module’s translator.

Use the table below to find the current requirements of the devices 

using backplane power. Those devices that are not included in the 

backplane calculations are included in the example’s user-side calculations.

Selecting a User-Side Power Supply

You must provide a power supply that meets your system 

requirements. The following devices require user-side power:

• SLC Servo Module

• Encoders

• I/O modules

• Estop circuitry

• Fast inputs and outputs

You must select a power supply that meets the specifications of a NEC 

class 2 power supply. The power supply must have +5V, ±15V 

capacity, and +24V capacity for fast I/O and Estop circuitry.

Example of the Calculations for User-Side Current Requirements 

In this example, the system includes:

• One seven-slot modular rack

• One 1747-L541 CPU module

• One 1746-IB8 DC input module with eight inputs @ +24V

• One 1746-OV8 DC output module with eight outputs @ +24V

• An SLC Servo Module system that contains:

• Two SLC Servo Modules

• Two termination panels

• Two Allen-Bradley 845H encoders

• Six fast inputs

• Two fast outputs

Example of Calculations for Backplane Current Requirements 

In this example, the system includes:

• One seven-slot modular rack

• One 1747-L543 CPU module

• One 1746-IB8 DC input module with eight inputs @ +24V

• One 1746-OV8 DC output module with eight outputs @ +24V

• An SLC Servo Module system that contains:

• SLC Servo Modules

• Termination panels

• Allen-Bradley 845H encoders

• Fast inputs

• Fast outputs

Using Fast Inputs and Outputs

The fast I/O (FIN1through FIN3, and FOUT1) are 24V DC compatible 

and are used with a user-side +24V power supply. Review potential

24V DC I/O devices for compatibility with the electrical specifications 

as shown in the table below.

The SLC Servo Module operates in two modes:

• Configuration 

• Command 

When operating in the configuration or the command mode, the status 

of the module is reported to the SLC processor.

Configuration Mode Operation

You can enter configuration mode only if the system is in Estop. In the 

SLC Servo Module, you configure the SLC Servo Module by using M 

files containing data provided by the SLC 5/03 (or versions listed 

above) processors. All configuration parameters are internal to the SLC 

Servo Module and stored in non-battery backed RAM.

In configuration mode, you select the proper setup configuration to 

match the servo drive and motor without setting switches and without 

special software. If you do not set up your own configuration, the 

configuration is set to the default setting.

SLC Servo Module Operation

The SLC Servo Module, compatible with the SLC family, is used with 

SLC 5/03 FRN 5.0 (and above) processors using RSLogix 500, AI500 or 

APS (version 5.0 or higher) software. Once the SLC processor is 

initiated, the execution of the motion block is independent of the scan 

time of the processor. Blended motion allows for complicated move 

profiles consisting of two to thirty-two segments. The blended move 

profiles are stored in the SLC Servo Module’s memory as a series of 

absolute moves and can be executed more than once. Other move or 

homing operations can be performed between blended move profiles.

The SLC Servo Module controls absolute position over a range of 32 

bits. The SLC Servo Module performs an origin search (also called 

homing) and automatically resets the absolute position to the home 

position when the SLC processor requests a search function after 

detecting one of the following: 

• Encoder marker

• Limit switch

• Limit switch and marker