# BACnet driver used at a modbus to BACnet gateway

**URL:** <https://forum.inductiveautomation.com/t/bacnet-driver-used-at-a-modbus-to-bacnet-gateway/90461>\
**Category:** Ignition\
**Created:** [May 15, 2024, 8:56pm UTC](https://forum.inductiveautomation.com/t/bacnet-driver-used-at-a-modbus-to-bacnet-gateway/90461 "2024-05-15T20:56:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![John\_Fry](https://avatars.discourse-cdn.com/v4/letter/j/a4c791/32.png) [@John\_Fry](https://forum.inductiveautomation.com/u/John_Fry)\
**Post date:** [May 15, 2024, 8:56pm UTC](https://forum.inductiveautomation.com/t/bacnet-driver-used-at-a-modbus-to-bacnet-gateway/90461/1 "2024-05-15T20:56:43Z")

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New to Ignition. We are replacing the software used on our SCADA systems from Cimplicity to Ignition.

With Cimplicity, in order to send collected data to a Building automation system via BACnet, we had to utilize an external Modbus RTU to BACnet gateway. Is there a way to utilize the BACnet feature of Ignition to act as this gateway instead of using an external unit?

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [May 15, 2024, 9:00pm UTC](https://forum.inductiveautomation.com/t/bacnet-driver-used-at-a-modbus-to-bacnet-gateway/90461/2 "2024-05-15T21:00:13Z")

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No, it can't act as a Modbus RTU to BACnet gateway.

Why do you need the gateway at all? Is the BACnet stuff all on another network you can't reach or did Cimplicity not have a BACnet driver?

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**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:** [May 15, 2024, 10:03pm UTC](https://forum.inductiveautomation.com/t/bacnet-driver-used-at-a-modbus-to-bacnet-gateway/90461/3 "2024-05-15T22:03:00Z")

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Well, you could add my alternate Modbus driver and set it up to be a Modbus RTU slave. It would need a fair amount of scripting to move data in both directions, but it is certainly possible. This topic might help:

> [@Modbus Slave/Server to Generate Read Only Tags](https://forum.inductiveautomation.com/t/modbus-slave-server-to-generate-read-only-tags/87583/21):
>
> I've create a generic "Modbus Publish" script that eliminates the need for a second set of tags. I've publicly posted it here: [https://www.automation-pros.com/ignition/modbusPublish.py](https://www.automation-pros.com/ignition/modbusPublish.py) It requires the "Queue Utility" script posted here: [https://www.automation-pros.com/ignition/queueUtil.py](https://www.automation-pros.com/ignition/queueUtil.py) and described over here: Both scripts rely on my Integration Toolkit's globalVarMap() script function, but you can rework that (not quite 1:1) to use system.util.getGlobals() if you must. (Not recomme…