Siemens M7-400, S7-400 13.9.2 Addressing and Interrupts

Interface Submodules
13-64 S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
13.9.2 Addressing and Interrupts
In the M7-300/400-Reserved I/O Address Area
The base address depends on the interface submodule slot in the expansion
module or the programmable module. See the descriptions “M7-300 Expansions”,
“M7-400 Expansions” or the description of the M7-400 programmable modules for
the slot-dependent base address of the interface submodule.
You require the base address for assigning parameters to the driver software.
Intermediate Memory
The IF 964-DP interface submodule provides (intermediate) storage of the data in
the dual-port RAM. The size of the memory and its address can be assigned via
the driver used.
Protected Mode: 1 out of 8 areas of 512 Kbytes in the address area
C0 00 00H bis FF FF FFH.
Note
The memory address must not collide with other system addresses. The
IF 964-VGA interface submodule, for example, occupies the addresses from
C 00 00H to C 7F FFH.
Interrupt Request
The interrupt line of the interface submodule is switched with a processor interrupt
per software parameter assignment.
Addressing in the S7-400 I/O Address Area
The interface submodule can be accessed by the respective interface in an
assigned address window.
Interrupt Request
The interrupt line of the interface submodule is permanently assigned to the
processor interrupt.
Submodule ID
The IF 964-DP interface submodule has the submodule ID 8CH.