The Options tab for the Siemens S7 driver tag properties folder consists of attributes used to identify and establish a connection to the control device to be associated with this driver.

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The S7 Driver is able to communicate with 3 Siemens devices: the S7-200, S7-300 and S7-400.
ISO over TCP is the only protocol currently available.
Two priority levels are available: OP Mode (low priority) and PG Mode (high priority). Note that there may be a limit on the number of PG mode connections which are available.
Specify the CPU position. These can be determined from the hardware configuration. Note that these fields do not apply to the S7-200 CPU.
If you are connecting to a Siemens PLC through a communications processor, select it here, otherwise select None.