Siemens SIMATIC S5 Manual page 288

Addressing S5 Modules
2.1 Addressing S5 Modules
Introduction There are two different ways of using an IP xxx S5 module in an S7-400 sy-
stem:
Addressing To be able to address an S5 module in an S7-400 system, you must set ad-
dresses at two different locations:
S7 address
The address used for addressing the module in the S7-400 system is selected
under STEP 7. Default addressing is not possible if the module is used in an
S7-400 system.
Specify the following values for addressing in the S7-400 system:
S5 address areas When you use S5 modules in the S7-400, you can address them in the follo-
wing address areas:
I/O area When an S5 module is used in the adapter casing, a PESP signal is only ge-
nerated in the P area. The signal is transferred to the module. A PESP signal
is not generated for the Q, IM3 and IM4 areas.
With a connection via IM 463-2, the IM 314 in the S5 extension unit generates
the PESP signal (for the selected P, Q, IM3 or IM4 area).
This corresponds to the I/O area of 256 bytes as it is defined for SIMATIC S5.
Use the jumpers or switches on the module to select the S5 module address in
these areas. The correct settings for the modules are specified in the related Ma-
nuals.
7–10
In an adapter casing in the S7 central unit
In the S5 extension unit with a connection via an IM 463-2 interface in
the S7 central unit and an IM 314 interface in the S5 extension unit
The address used for addressing the module in the application program
and the address set on the module must be entered under STEP 7.
The address of the S5 module in a valid address range (address switches
on the module).
– S7 address: Logic address. The range depends on the CPU.
– S5 address: Assigned address on the module.
Range: 0 ... 255 (in bytes)
– Length: Size of address block.
Range: 0 ... 128 (in bytes)
– Partial PA: Partial process map allocation.
Range:
– Area: Range: P, Q, IM3, IM4.
I/O area (P)
Extended I/O area (Q, IM3, IM4)
Page frame area
0 (full PA)
1 ... 8 (partial PA)
C79000–B8576–C866–01
IP244