# How to Ignore Unconnected Slave in RS485 MODBUS RTU

**URL:** <https://discourse.nodered.org/t/how-to-ignore-unconnected-slave-in-rs485-modbus-rtu/62678>\
**Category:** General\
**Tags:** modbus\
**Created:** [16 May 2022 08:22 UTC](https://discourse.nodered.org/t/how-to-ignore-unconnected-slave-in-rs485-modbus-rtu/62678 "2022-05-16T08:22:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![haeWoozu](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/haewoozu/32/61599_2.png) [@haeWoozu](https://discourse.nodered.org/u/haeWoozu)\
**Post date:** [16 May 2022 08:22 UTC](https://discourse.nodered.org/t/how-to-ignore-unconnected-slave-in-rs485-modbus-rtu/62678/1 "2022-05-16T08:22:20Z")

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8CH devices are connected to one port and each device has a different Unit-Id.  
Is there any way to ignore the error when the Slave equipment is not connected?

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/1/8/187ba4eba40c835f0d3c684786520309fd88766a.png)

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [15 July 2022 08:22 UTC](https://discourse.nodered.org/t/how-to-ignore-unconnected-slave-in-rs485-modbus-rtu/62678/2 "2022-07-15T08:22:58Z")

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