# Simulating Responses for Multiple Modbus Devices? **URL:** \ **Category:** Ignition\ **Created:** [February 27, 2025, 4:06pm UTC](https://forum.inductiveautomation.com/t/simulating-responses-for-multiple-modbus-devices/102987 "2025-02-27T16:06:12Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [February 27, 2025, 5:09pm UTC](https://forum.inductiveautomation.com/t/simulating-responses-for-multiple-modbus-devices/102987/5 "2025-02-27T17:09:46Z")
You probably want to try my alternate Modbus driver, and use multiple nodes in multiple instances, with each instance listening on a different port. You can have 255 nodes per instance, and every node/instance combination will have its own live storage. For efficiency, you should configure each node to only cover a limited range of addresses. > [@Automation Professionals' Advanced Modbus Driver](https://forum.inductiveautomation.com/t/automation-professionals-advanced-modbus-driver/41312): > > Automation Professionals is pleased to announce the first beta for its Advanced Modbus Driver, for Ignition version 7.9. Key features: Server mode, emulating one or more slave [devices](https://www.automation-pros.com/modbus/UserManual.pdf), using any of the three typical connection types, including simultaneous connections of multiple types. Client mode, incorporating all three connection modes in one driver. Support for Modbus Function Codes 20 and 21, File Records. Configure protocol tweaks for troublesome devices per slave unit, enabling suppor… Consider running an extra Ignition gateway (in trial mode for dev, perhaps) just for such emulation tasks. Give the extra gateway multiple IP addresses if necessary. --- _[View the full topic](https://forum.inductiveautomation.com/t/simulating-responses-for-multiple-modbus-devices/102987)._