# Modbus RTU timing issues **URL:** \ **Category:** Ignition\ **Created:** [March 21, 2024, 2:56am UTC](https://forum.inductiveautomation.com/t/modbus-rtu-timing-issues/87672 "2024-03-21T02:56:58Z")\ **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:** [March 21, 2024, 10:58am UTC](https://forum.inductiveautomation.com/t/modbus-rtu-timing-issues/87672/5 "2024-03-21T10:58:47Z")
> [@ryanastiefes](#): > > If that is correct how do I go about handling Reverse Word order on half the devices while the other half do not require it? My alternate driver allows these settings to be per-unit-address. It also has a number of timing tweaks that IA's driver does not. If converting, note that it **only** does zero-based addressing, does **not** use address mappings, and defaults to unit #1 instead of unit #0. > [@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… --- _[View the full topic](https://forum.inductiveautomation.com/t/modbus-rtu-timing-issues/87672)._