# Status Monitor Maschinepark Siemens IOT2040
**URL:** https://discourse.nodered.org/t/status-monitor-maschinepark-siemens-iot2040/41423
**Category:** General
**Created:** [22 February 2021 12:35 UTC](https://discourse.nodered.org/t/status-monitor-maschinepark-siemens-iot2040/41423 "2021-02-22T12:35:28Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@spranz](https://discourse.nodered.org/u/spranz)
#### Post date: [22 February 2021 12:35 UTC](https://discourse.nodered.org/t/status-monitor-maschinepark-siemens-iot2040/41423/1 "2021-02-22T12:35:28Z")
Hello i´m from germany, so sorry for my bad englisch 😆
I have done my first steps under nodered to collect data from different plc´s and transfer them to a database.
Now i have an new project, i want to retrofit my old maschine status screens with Siemens IOT2040 Hardware under NodeRed.
I need some help to decode the data from the old PLC witch is connected to the old displays.
In the old display there is behind every number a status text written and stored inside the display.
From the old datasheet i could understand how the communication PLC--\> Display works.
For the connection we use 5 Pins:
BCD- Pin 1
BCD- Pin 2
BCD- Pin 3
BCD- Pin 4
LE - Pin 5
LE LOW ---\>\> HIGH (0,8ms LOW / 8ms HIGH)
BCD read Textnumber 10^2 (0,5ms)
LE LOW ---\>\> HIGH (0,8ms LOW / 8ms HIGH)
BCD read Textnumber 10^1 (0,5ms)
LE LOW ---\>\> HIGH (0,8ms LOW / 8ms HIGH)
BCD read Textnumber 10^0 (0,5ms)
LE LOW ---\>\> HIGH (0,8ms LOW / 8ms HIGH)
BCD = F (end of the code)
At the end we have to combine the 3 BCD Numbers to the Textnumber.
After that i want to pop up a Text or something else in the Nodered Dashboard.
I hope anyone can help me or give me a tip how i can start...
Best regards
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [23 April 2021 12:36 UTC](https://discourse.nodered.org/t/status-monitor-maschinepark-siemens-iot2040/41423/2 "2021-04-23T12:36:10Z")
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