# Connect to modbus accross bridge

**URL:** <https://forum.inductiveautomation.com/t/connect-to-modbus-accross-bridge/6113>\
**Category:** Ignition\
**Created:** [March 27, 2013, 8:20pm UTC](https://forum.inductiveautomation.com/t/connect-to-modbus-accross-bridge/6113 "2013-03-27T20:20:34Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![cja7928](https://avatars.discourse-cdn.com/v4/letter/c/258eb7/32.png) [@cja7928](https://forum.inductiveautomation.com/u/cja7928)\
**Post date:** [March 27, 2013, 8:20pm UTC](https://forum.inductiveautomation.com/t/connect-to-modbus-accross-bridge/6113/1 "2013-03-27T20:20:34Z")

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I am trying to connect to a Modicon PLC (address 8 ) that is isolated from primary Modbus network by a bridge(address 20). I wonder if there is a way. I have tried the [device]20.8.label41137 entry, but no luck. Do you know how I can do this?

Thank you.

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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:** [March 27, 2013, 9:01pm UTC](https://forum.inductiveautomation.com/t/connect-to-modbus-accross-bridge/6113/2 "2013-03-27T21:01:01Z")

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I’m not quite clear on what you’re trying to do.

The modbus protocol only supports specifying one slave id in the request packets; if you need another hop that then goes to ANOTHER slave id then it would need to be configured on that 2nd intermediary gateway/device.

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<div class="post-metadata">

**Author:** ![cja7928](https://avatars.discourse-cdn.com/v4/letter/c/258eb7/32.png) [@cja7928](https://forum.inductiveautomation.com/u/cja7928)\
**Post date:** [March 27, 2013, 9:40pm UTC](https://forum.inductiveautomation.com/t/connect-to-modbus-accross-bridge/6113/3 "2013-03-27T21:40:31Z")

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thank you