Siemens SITOP Series Function Manual page 120

Working with the library
7.3 WinCC Comfort/Advanced
Step number Instruction
6 Repeat the steps for each of your CNX8600 4X expansion modules. When selecting the trend tags, ensure
that the correct HMI tag is mapped.
For example, the following HMI tags should be mapped:
CNX8600 module1: CNX1_Output1_Trend_Current to CNX1_Output4_Trend_Current
CNX8600 module2: CNX2_Output1_Trend_Current to CNX2_Output4_Trend_Current
CNX8600 module3: CNX3_Output1_Trend_Current to CNX3_Output4_Trend_Current
CNX8600 module4: CNX4_Output1_Trend_Current to CNX4_Output4_Trend_Current
If you are using CNX8600 8X expansion modules ensure to add 4 more trends and ensure the following
HMI tags are mapped:
CNX8600 module1: CNX1_Output5_Trend_Current to CNX1_Output8_Trend_Current
CNX8600 module2: CNX2_Output5_Trend_Current to CNX2_Output8_Trend_Current
CNX8600 module3: CNX3_Output5_Trend_Current to CNX3_Output8_Trend_Current
CNX8600 module4: CNX4_Output5_Trend_Current to CNX4_Output8_Trend_Current
SITOP PSU8600 Firmware V1.4: Faceplates and Communication Blocks V2.4 for SIMATIC STEP 7 V14 SP1, V15 and V15.1 (TIA)
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Function Manual, 11.2018, A5E37763954-09-76