No, you cannot sum currents from multiple shared power supply pin types and enter them into a single supply pin type using the Intel® Power Distribution Network (PDN) Tool.
The Intel PDN Tool uses the number of pins, and package parasitic information for the chosen device to calculate the effective impedance. Summing shared currents and entering this into a single power supply pin type causes the spreading inductance to be miscalculated. You should always enter the correct current for each supply pin type on your Intel FPGA design into the Intel PDN Tool.
Example 1
If a shared 1.2v supply consisting of VCCIO2A and VCCIO2B each draw 0.3A totalling 0.6A, you should not enter 0.6A for VCCIO2A, and 0A for VCCIO2B.
You should enter 0.3A for VCCIO2A, and 0.3A for VCCIO2B.
Example 2
If a shared 1.03v supply consisting of VCCR_GXBL1C, VCCR_GXBL1D, VCCT_GXBL1C, and VCCT_GXBL1D draw 0.5A, 0.5A, 0.2A, and 0.2A respectively, you should not enter 1A for VCCR_GXBL1C, and 0.4A for VCCT_GXBL1C.
You should enter VCCR_GXBL1C = 0.5A, VCCR_GXBL1D = 0.5A, VCCT_GXBL1C = 0.2A, and VCCT_GXBL1D = 0.2A.