My problem has been solved with the set environment variables:
In command prompt (Windows 7, 64-bit) :
#---------------------------------------#
@echo off
SET PATH=C:\Programs\Anaconda2;C:\Programs\Anaconda2\Scripts;%PATH%
SET GDAL_DATA=C:\Programs\Anaconda2\Lib\site-packages\sen2cor-2.2.1-py2.7.egg/sen2cor\cfg\gdal_data
SET GDAL_DRIVER_PATH=C:\Programs\Anaconda2\Lib\site-packages\osgeo\gdalplugins
SET PYTHONPATH=C:\Programs\Anaconda2\Lib\site-packages
SET SEN2COR_BIN=C:\Programs\Python27\Lib\site-packages\sen2cor-2.2.1-py2.7.egg/sen2cor
#—
The data set in C :\
#—
Z:>L2A_Process C:\S2A\S2A_OPER_MTD_SAFL1C_PDMC_20160514T140908_R092_V20160514T075819_20160514T075819.SAFE --resolution=10
Sentinel-2 Level 2A Prototype Processor (Sen2Cor), 2.2.1, created: 2016.04.29 started …
selected resolution is 10 m.
Progress[%]: 0.03 : PID-6980, L2A_ProcessTile: processing with resolution 20 m, elapsed time[s]: 7.856
Progress[%]: 0.03 : PID-6980, L2A_ProcessTile: start of pre processing, elapsed time[s]: 0.004
Progress[%]: 0.03 : PID-6980, L2A_Tables: start import, elapsed time[s]: 0.343
Progress[%]: 0.05 : PID-6980, L2A_Tables: band B01 imported, elapsed time[s]: 6.522
Progress[%]: 0.09 : PID-6980, L2A_Tables: band B02 imported, elapsed time[s]: 14.729
Progress[%]: 0.14 : PID-6980, L2A_Tables: band B03 imported, elapsed time[s]: 14.679
Progress[%]: 0.19 : PID-6980, L2A_Tables: band B04 imported, elapsed time[s]: 15.596
Progress[%]: 0.20 : PID-6980, L2A_Tables: band B05 imported, elapsed time[s]: 4.211
(…)