SIMATIC RF120C 
Operating Instructions, 02/2021, C79000-G8976-C328-03 
5 
 
Purpose of this documentation 
With the information in this documentation, you will be able to commission and operate the 
SIMATIC RF120C communications module with a SIMATIC S7-1200 controller. 
Basic knowledge required 
These operating instructions assume general knowledge of automation engineering and 
identification systems. 
Scope of the manual 
These operating instructions are valid for the SIMATIC RF120C communications module and 
describe the delivery status as of product version 06. If you are using older product versions, 
please refer to the 10/2018 edition of the documentation. 
Note 
Validity of the manual for other communications modules
 
You can also use the function blocks described in the section "
Programming via SIMATIC 
 (Page 25)" in the same way for the communication modules RF18xC/RF18xCI 
) and RF166C (PROFIBUS) if these are connected to an S7-1200 or S7-1500. You 
can find the reset blocks required for these communication modules in the manual "Ident 
profile and Ident blocks, standard function for Ident systems 
(https://support.industry.siemens.com/cs/ww/en/view/109781633)". 
Position in the information landscape 
•  In addition to these operating instructions, you need the system manual "SIMATIC S7-
1200 programmable controller 
(https://support.industry.siemens.com/cs/ww/en/view/109772940)". 
•  The manuals of the relevant IID system 
(https://support.industry.siemens.com/cs/ww/en/ps/14970/man) contain information on 
the readers and optical code readers to be connected. 
•  You can find information on configuration and parameter assignment, as well as on the 
reset blocks, in the "Ident profile and Ident blocks, standard function for Ident systems 
(https://support.industry.siemens.com/cs/ww/en/view/109781633)" manual.