# Reading value from ML PLC using modbus serial RS232 in nodered

**URL:** <https://discourse.nodered.org/t/reading-value-from-ml-plc-using-modbus-serial-rs232-in-nodered/72726>\
**Category:** General\
**Created:** [26 December 2022 13:52 UTC](https://discourse.nodered.org/t/reading-value-from-ml-plc-using-modbus-serial-rs232-in-nodered/72726 "2022-12-26T13:52:44Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [26 December 2022 17:09 UTC](https://discourse.nodered.org/t/reading-value-from-ml-plc-using-modbus-serial-rs232-in-nodered/72726/4 "2022-12-26T17:09:06Z")

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Did you check or setup the PLC as I indicated in the previous thread here: [How to find address for ML 1200 for modbus or RS485 - #23 by Steve-Mcl](https://discourse.nodered.org/t/how-to-find-address-for-ml-1200-for-modbus-or-rs485/71284/23)

What addresses are mapped to the modbus register's?

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