Siemens Simatic S7-400 User Manual download pdf (Page 508)

100

101

Interface Submodules

13-12

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

13.4.2 Addressing and Interrupts

Addressing

The IF 962-COM interface submodule can be addressed in the following two ways:

• In the AT-compatible I/O address area

• In the M7-300/400-reserved I/O address area (from C000

Addressing in the AT-Compatible I/O Address Area

The COM ports can be operated in the AT-compatible I/O address area. The

settings are made in the BIOS Setup. You can see the addresses that can be set in

the BIOS Setup from the following table.

Table 13-9 Addressing the COM Ports in the AT-Compatible Address Area

Name

I/O Address Remarks

03F8

to 03FF

02F8

to 02FF

03E8

to 03EF

Automatically configured by the BIOS and

02E8

to 02EF

Automatically configured by the BIOS and

can be set in the BIOS setup.

– 0380

to 0387

– 0280

to 0287

*) The BIOS searches the addresses in the order 03F8

, 02F8

, 03E8

and 02E8

and

assigns COM1, COM2, COM3 and COM4 in ascending order. There is no fixed

assignment of the I/O addresses to COMx. For example, if only one COM port is detected

at address 12E8

, this will be COM1.

Example of Setting an AT-Compatible I/O Address

In the following example, the I/O addresses 03F8

(COM1) for COMa and 02F8

(COM2) for COMb are to be set in the BIOS setup. Proceed as follows to do this:

1. Select the “IF Modules” page in the BIOS setup.

2. Enter the submodule receptacle number of the interface submodule in “Select

Module #”.

3. Enter the offset address for the configuration register of the interface submodule

“00

” at “Config.Index”

4. Enter “36

” at “Value”. This value is then written into the configuration register

(see also Table 13-13).

5. Press the OK button.

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