Frequently asked questions
Where are the sysParameters of TM173 documented ? The term sysParameter is not mentioned in either the M173 Hardware Guide or the EcoStruxure Machine Expert - HVAC Operating (Programming) Guide.
FAQ000280247
06 March 2026
Issue:
Where are the sysParameters of TM173 documented ? The term sysParameter is not mentioned in either the M173 Hardware Guide or the EcoStruxure Machine Expert - HVAC Operating (Programming) Guide.
Product Line:
TM173 Product Line
Resolution:
Target variables are not documented in the Hardware guide, they are described in the variable properties.
sysParameter is a struct of type sysParamStruct:
You can find its description in the Struct definition:
You can Read/Write a struct using the IEC standard language sysParameter.<fieldname> := <value>;