Siemens SIMATIC S5 Manual page 290

Addressing S5 Modules
Typical addressing An IP 244 needs 32 addresses for transferring the necessary parameters. Only
in the P area
the module's start address is selected. Internal decoding allocates the next 31
addresses. These addresses are no longer available to other modules. Addres-
ses can be selected in multiples of 32.
The module's input and output addresses (S5 and S7) must be identical. This is
necessary for correct utilization of the standard function blocks.
In addition, you must enter the following parameters when you configure your
hardware under STEP 7:
The IP 244 may not lie inside the process map. There are two alternatives to sa-
tisfy this requirement:
7–12
– S7 address: a logic address
addressing the module in the application
program)
– S5 address: same as on the module
– Length: 32 bytes
– Partial PA: 0
– Area: depends on the area selected on the module or the
IM 314 (P, Q, IM3 or IM4)
select an S7 address 512
select a partial PA value 0
512 (this address is used for
IP244
C79000–B8576–C866–01