Siemens Simatic S7-400 - Manual (Page 498)

Interface Submodules
13-2
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
13.1 Interface Submodules Overview
Introduction
The interface submodules are designed for use in the M7-300 and M7-400
automation computers. They can be operated in the M7-400 programmable
modules and in the EXM 378/EXM 478 expansion modules. The interface
submodules are controlled via the ISA bus.
The interface submodules are labeled on the front plate and so can be identified
even when installed.
Handling
Interface submodules and their front connectors must only be plugged in or
removed when the power is switched off. Avoid confusing front connectors since
this can destroy the interface submodules or the connected devices.
ESD Guidelines
The interface submodules are not enclosed on the underside. For this reason, you
must observe ESD guidelines when handling these modules.
Slots/Submodule Receptacle Numbers
To link the interface submodules into your system (for example, BIOS Setup), you
require the submodule receptacle numbers. See the descriptions of the M7-400
programmable modules or the M7-300/400 expansion modules for the numbering
of the individual submodule receptacles.
Addressing in the M7-300/400 - Reserved I/O Address Area
In the M7-300/400 automation computers, the I/O address area C000
H
is reserved
for addressing the interface submodules.
The base address at which an interface submodule can be addressed depends on
the submodule receptacle of the M7-400 programmable module or the M7-300/400
expansion module containing the interface submodule. You can find the
submodule-receptacle-dependent base address of the interface submodule in the
description of the M7-400 programmable module or the M7-300/400 expansion
module.
The sections below describe the registers and their meanings as well as the
associated offset addresses for the individual interface submodules.
The resulting I/O address is the sum of the base address and the offset address.
Submodule ID
Each interface submodule has a submodule ID stored in read-only memory. This
information is required in the BIOS Setup.