The SI7 driver is a GE version 7.x I/O driver. It provides the interface and communications protocol between Siemens Simatic hardware and your process control software.
The SI7 driver supports datablock numbers up to 8191. If you add more than 8191 datablocks to the target database for the SI7 driver, the database will fail the I/O addresses that exceed this number.
For detailed information, refer to the SI7 online help.
