# What does the error code "port not open" mean?

**URL:** https://discourse.nodered.org/t/what-does-the-error-code-port-not-open-mean/83101
**Category:** General
**Tags:** modbus
**Created:** [22 November 2023 14:59 UTC](https://discourse.nodered.org/t/what-does-the-error-code-port-not-open-mean/83101 "2023-11-22T14:59:46Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Maans](https://avatars.discourse-cdn.com/v4/letter/m/fbc32d/32.png) [@Maans](https://discourse.nodered.org/u/Maans)
#### Post date: [22 November 2023 14:59 UTC](https://discourse.nodered.org/t/what-does-the-error-code-port-not-open-mean/83101/1 "2023-11-22T14:59:46Z")

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Im trying to use a siemens iot2050 to read values from PAC3220. But from my modbus read node I get the error "Port not open". How do I fix this?

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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: [21 January 2024 14:59 UTC](https://discourse.nodered.org/t/what-does-the-error-code-port-not-open-mean/83101/2 "2024-01-21T14:59:48Z")

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