# Ignition and Siemens 840D (SL / PL / classic) communiation

**URL:** <https://forum.inductiveautomation.com/t/ignition-and-siemens-840d-sl-pl-classic-communiation/114829>\
**Category:** Ignition\
**Created:** [April 1, 2026, 10:22am UTC](https://forum.inductiveautomation.com/t/ignition-and-siemens-840d-sl-pl-classic-communiation/114829 "2026-04-01T10:22:59Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![nnaik](https://avatars.discourse-cdn.com/v4/letter/n/53a042/32.png) [@nnaik](https://forum.inductiveautomation.com/u/nnaik)\
**Post date:** [April 1, 2026, 10:22am UTC](https://forum.inductiveautomation.com/t/ignition-and-siemens-840d-sl-pl-classic-communiation/114829/1 "2026-04-01T10:22:59Z")

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Hello Gentlemen,

I have a question does Ignition support communication with Siemens 840D (SL / PL / classic). via Ignitions Native drivers.

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**Author:** ![zxcslo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zxcslo/32/61610_2.png) [@zxcslo](https://forum.inductiveautomation.com/u/zxcslo)\
**Post date:** [April 1, 2026, 11:49am UTC](https://forum.inductiveautomation.com/t/ignition-and-siemens-840d-sl-pl-classic-communiation/114829/2 "2026-04-01T11:49:21Z")

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AFAIK, the Sinumerik has two controlers; one for CNC and another for PLC.

You can access the PLC with Ignition S7-300 driver.

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<div class="post-metadata">

**Author:** ![nnaik](https://avatars.discourse-cdn.com/v4/letter/n/53a042/32.png) [@nnaik](https://forum.inductiveautomation.com/u/nnaik)\
**Post date:** [April 1, 2026, 12:03pm UTC](https://forum.inductiveautomation.com/t/ignition-and-siemens-840d-sl-pl-classic-communiation/114829/3 "2026-04-01T12:03:09Z")

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We have CNC controller

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<div class="post-metadata">

**Author:** ![zxcslo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zxcslo/32/61610_2.png) [@zxcslo](https://forum.inductiveautomation.com/u/zxcslo)\
**Post date:** [April 1, 2026, 12:36pm UTC](https://forum.inductiveautomation.com/t/ignition-and-siemens-840d-sl-pl-classic-communiation/114829/4 "2026-04-01T12:36:13Z")

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> [@nnaik](#):
>
> SL / PL / classic

You can’t have one without another…

[does sinumerik 840D have separate CNC and PLC controller?](https://www.google.com/search?q=does+sinumerik+840D+have+separate+CNC+and+PLC+controller&num=10&udm=50&aep=1&ntc=1&mstk=AUtExfBUt-iq8hAZxjl2KFYKzOVFQAZQAC_QHxWKm7K0tfPQDM8K0zhByvX-bqHLXQoqBjueO2SVVnPifNQBTCsA5Nu-TLOnu_xV0F0CyrkZT4Fn5qv0dtG-0QXTtrA0-1ahwJhUsF818BX6NDh0Uk-OsY28qC6HDs9be4mm81VWMcmZzCyXTkZkYmNl9-aM1EFwn67gwkU8lXDagFAB_dY03ovATjJHHtCw3CRMPgLG2QU9n8_0tPJubzwU0e97-aJdDN8Dgs-pYigZIvWoJ9QzJ9MHZn14fFW9J9OmDJcZMiWwMMsmPonvGt69EDfY8MpYn1qNvxQbzrxh_E2U1oSR0EKpOJ4VRWJ-lA&csuir=1&mtid=jhDNafurL56ui-gP_NGxmA8)