# \#rt-lab **URL:** https://community.opal-rt.com/tag/rt-lab/45.md [Latest](https://community.opal-rt.com/latest.md) · [Categories](https://community.opal-rt.com/categories.md) · [Tags](https://community.opal-rt.com/tags.md) --- ## [OpComm block stays at 1 input/output, and I get a port width error when I update my model](https://community.opal-rt.com/t/opcomm-block-stays-at-1-input-output-and-i-get-a-port-width-error-when-i-update-my-model/1798)
**Author:** [@jakub](https://community.opal-rt.com/u/jakub)\ **Replies:** 1\ **Last updated:** [October 23, 2026, 3:59pm UTC](https://community.opal-rt.com/t/opcomm-block-stays-at-1-input-output-and-i-get-a-port-width-error-when-i-update-my-model/1798 "2026-10-23T15:59:02Z")
hello everyone, I’m trying to connect my model to RT-LAB but when I try to verify my model on Simulink once adding the RTLAB blocks, I’m having some error with the OpComm block. My error messages: \*\*Error in port width… --- ## [Guidance Needed: Building a Real-Time Digital Twin for a Variable Transmission System](https://community.opal-rt.com/t/guidance-needed-building-a-real-time-digital-twin-for-a-variable-transmission-system/248)
**Author:** [@AzzdenMeladi](https://community.opal-rt.com/u/AzzdenMeladi)\ **Replies:** 1\ **Last updated:** [October 16, 2026, 4:55pm UTC](https://community.opal-rt.com/t/guidance-needed-building-a-real-time-digital-twin-for-a-variable-transmission-system/248 "2026-10-16T16:55:38Z")
Hello everyone, I am working on a project involving a next-generation mechanical transmission system for wind turbines. I am interested in building a real-time digital twin to simulate its behavior under varying input c… --- ## [Smart\_Collar\_Simulation](https://community.opal-rt.com/t/smart-collar-simulation/257)
**Author:** [@zizo](https://community.opal-rt.com/u/zizo)\ **Replies:** 1\ **Last updated:** [October 16, 2026, 4:52pm UTC](https://community.opal-rt.com/t/smart-collar-simulation/257 "2026-10-16T16:52:47Z")
Smart\_Collar\_Simulation --- ## [Can I use Matlab 2025b in RTlab?](https://community.opal-rt.com/t/can-i-use-matlab-2025b-in-rtlab/262)
**Author:** [@Vincent\_Jiang](https://community.opal-rt.com/u/Vincent_Jiang)\ **Replies:** 1\ **Last updated:** [October 13, 2026, 2:45am UTC](https://community.opal-rt.com/t/can-i-use-matlab-2025b-in-rtlab/262 "2026-10-13T02:45:52Z")
I have MATLAB 2025b, and can I use MATLAB 2025b for RT-LAB? MATLAB 2025b has SPS, but I have to key lib to find it. --- ## [How Should Previous Releases of RT-Lab Be Shared With Customers](https://community.opal-rt.com/t/how-should-previous-releases-of-rt-lab-be-shared-with-customers/142)
**Author:** [@Yuheng](https://community.opal-rt.com/u/Yuheng)\ **Replies:** 2\ **Last updated:** [September 16, 2026, 8:54pm UTC](https://community.opal-rt.com/t/how-should-previous-releases-of-rt-lab-be-shared-with-customers/142 "2026-09-16T20:54:06Z")
Hi all, I’m an Opal-RT FAE, and I’d like to start a discussion: Should we utilise this platform to share software resources with customers? Background We regularly receive customer requests for legacy RT-Lab versions t… --- ## [Islanded Inverter-Based Microgrid Using Droop Control in RT-LAB](https://community.opal-rt.com/t/islanded-inverter-based-microgrid-using-droop-control-in-rt-lab/88)
**Author:** [@DK\_19](https://community.opal-rt.com/u/DK_19)\ **Replies:** 2\ **Last updated:** [September 9, 2026, 3:30pm UTC](https://community.opal-rt.com/t/islanded-inverter-based-microgrid-using-droop-control-in-rt-lab/88 "2026-09-09T15:30:16Z")
Overview A practical RT-LAB microgrid example with parallel inverters, droop-based active and reactive power sharing, and islanded load-step response. This RT-LAB starter model demonstrates how multiple inverter-based D… --- ## [RTE PWM connect to MOSFET](https://community.opal-rt.com/t/rte-pwm-connect-to-mosfet/189)
**Author:** [@Hello](https://community.opal-rt.com/u/Hello)\ **Replies:** 1\ **Last updated:** [September 8, 2026, 3:09pm UTC](https://community.opal-rt.com/t/rte-pwm-connect-to-mosfet/189 "2026-09-08T15:09:42Z")
I want to generate a 100kHz pulse train that will fed to MOSFET. As i am new to this will anyone suggest me for this --- ## [Simulating RTDS for station models using RTLAB](https://community.opal-rt.com/t/rtlab-rtds/174)
**Author:** [@zhang](https://community.opal-rt.com/u/zhang)\ **Replies:** 1\ **Last updated:** [August 31, 2026, 5:52pm UTC](https://community.opal-rt.com/t/rtlab-rtds/174 "2026-08-31T17:52:56Z")
I am currently simulating an RTDS inverter model and want to add a cable module in RT-LAB. However, during debugging, I found that the model diverges after adding the cable capacitance. The cable parameters are kept consistent with those in the RTDS, as shown below: --- ## [In RT-LAB, what's the difference between Normal, Accelerator, and Real-Time execution?](https://community.opal-rt.com/t/in-rt-lab-whats-the-difference-between-normal-accelerator-and-real-time-execution/134)
**Author:** [@Arno](https://community.opal-rt.com/u/Arno)\ **Replies:** 2\ **Last updated:** [July 22, 2026, 3:43pm UTC](https://community.opal-rt.com/t/in-rt-lab-whats-the-difference-between-normal-accelerator-and-real-time-execution/134 "2026-07-22T15:43:12Z")
Hi, I’m new to RT-LAB. Can someone explain when I should use Simulink Normal mode, Accelerator mode, and Real-Time execution? Thanks! --- ## [BMS Testing Fundamentals](https://community.opal-rt.com/t/bms-testing-fundamentals/128)
**Author:** [@PFA007](https://community.opal-rt.com/u/PFA007)\ **Replies:** 0\ **Last updated:** [July 21, 2026, 7:36pm UTC](https://community.opal-rt.com/t/bms-testing-fundamentals/128 "2026-07-21T19:36:16Z")
BMS Testing Fundamentals Understanding Modern Battery Management System Validation As electric vehicles, energy storage systems, aerospace platforms, and off-highway machines continue to evolve, the Battery Management … --- ## [PMSM Drive and Motor Control HIL in RT-LAB](https://community.opal-rt.com/t/pmsm-drive-and-motor-control-hil-in-rt-lab/116)
**Author:** [@DK\_19](https://community.opal-rt.com/u/DK_19)\ **Replies:** 0\ **Last updated:** [July 21, 2026, 2:35am UTC](https://community.opal-rt.com/t/pmsm-drive-and-motor-control-hil-in-rt-lab/116 "2026-07-21T02:35:33Z")
Overview A motor-drive starter model for validating PMSM control, inverter behavior, and drive dynamics in real time. This model gives the RT-LAB community a classic electric-drive example with broad appeal across ac… --- ## [IEEE 123-Bus Stubline Compensation with ARTEMiS SSN in RT-LAB](https://community.opal-rt.com/t/ieee-123-bus-stubline-compensation-with-artemis-ssn-in-rt-lab/115)
**Author:** [@DK\_19](https://community.opal-rt.com/u/DK_19)\ **Replies:** 0\ **Last updated:** [July 21, 2026, 2:05am UTC](https://community.opal-rt.com/t/ieee-123-bus-stubline-compensation-with-artemis-ssn-in-rt-lab/115 "2026-07-21T02:05:43Z")
Overview An advanced RT-LAB / ARTEMiS example using the IEEE 123-node distribution feeder to demonstrate Compensated Stublines and SSN-based network decoupling for real-time simulation. This advanced example demonstr… --- ## [RT-LAB 2026.1 Released: Enhanced Compatibility, Advanced Modeling, and Improved User Experience](https://community.opal-rt.com/t/rt-lab-2026-1-released-enhanced-compatibility-advanced-modeling-and-improved-user-experience/114)
**Author:** [@InesEb](https://community.opal-rt.com/u/InesEb)\ **Replies:** 0\ **Last updated:** [July 20, 2026, 3:14pm UTC](https://community.opal-rt.com/t/rt-lab-2026-1-released-enhanced-compatibility-advanced-modeling-and-improved-user-experience/114 "2026-07-20T15:14:29Z")
OPAL-RT has released RT-LAB 2026.1, delivering expanded compatibility with the latest MATLAB and Simulink versions, along with new modeling capabilities and usability improvements for real-time simulation workflows. Thi… --- ## [RT-LAB and EXata CPS Co-Simulation Starter Example](https://community.opal-rt.com/t/rt-lab-and-exata-cps-co-simulation-starter-example/95)
**Author:** [@DK\_19](https://community.opal-rt.com/u/DK_19)\ **Replies:** 1\ **Last updated:** [July 15, 2026, 1:00pm UTC](https://community.opal-rt.com/t/rt-lab-and-exata-cps-co-simulation-starter-example/95 "2026-07-15T13:00:00Z")
Overview A cyber-physical co-simulation workflow for combining RT-LAB electrical models with communication-network behavior through EXata CPS. This model category is designed for users who need to study the impact of co… --- ## [CAN Integration in an Existing RT-LAB I/O Model](https://community.opal-rt.com/t/can-integration-in-an-existing-rt-lab-i-o-model/94)
**Author:** [@Parija](https://community.opal-rt.com/u/Parija)\ **Replies:** 1\ **Last updated:** [July 14, 2026, 1:00pm UTC](https://community.opal-rt.com/t/can-integration-in-an-existing-rt-lab-i-o-model/94 "2026-07-14T13:00:00Z")
Overview A practical RT-LAB example showing how to integrate CAN into an existing model and avoid common OpComm and I/O setup issues. This example is intentionally practical. It is based on a real integration workflow a… --- ## [Grid-Connected Smart Inverter and DER Controller Validation in RT-LAB](https://community.opal-rt.com/t/grid-connected-smart-inverter-and-der-controller-validation-in-rt-lab/89)
**Author:** [@DK\_19](https://community.opal-rt.com/u/DK_19)\ **Replies:** 1\ **Last updated:** [July 9, 2026, 1:00pm UTC](https://community.opal-rt.com/t/grid-connected-smart-inverter-and-der-controller-validation-in-rt-lab/89 "2026-07-09T13:00:00Z")
Overview A starter model for testing smart inverter control logic and grid-support behavior in a realistic real-time grid environment. This model category is designed for engineers validating smart inverter behavior aga…