Interface Submodules
13-46 S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
13.7.6 Starting Up the IF 961-AIO Interface Submodule

Electrical Installation

You must connect the ground terminal (M and S0/S1) of the analog input/output
module with the ground terminal of the load power supply. Use a cable with a
cross-section of 1 mm2 for this purpose.

Unswitched Channels

You must short-circuit unswitched input channels. This achieves optimal noise
immunity for the analog module.
Leave unswitched output channels open.
13.7.7 Addressing
Addressing
The IF 961-AIO interface submodule is addressed with the M7-300/400-reserved
I/O address area (starting from C000H).
Addressing 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.
The I/O address is the sum of the base address and the offset address.
The registers and their meanings and the offset addresses are described below.
Table 13-39 Offset Address Assignments for the IF 961-AIO Interface Submodule
Offset
Address Function when
Reading Function when
Writing
00HADC data channel 0 (20 - 215)ADC data channel 0 (20 - 215)
02HADC data channel 1 (20 - 215)ADC data channel 1 (20 - 215)
04HADC data channel 2 (20 - 215) Reserved
06HADC data channel 3 (20 - 215) Reserved
08HIndication of settings such as automatic
conversion, cycle time, interrupt enable Setting of automatic conversion,
cycle time and interrupt enable
0AHIndication of channel number Output of channel number
0CHIndication of end of conversion (EOC)
and voltage fault Start of analog-digital conversion
0EHReserved Interrupt acknowledgment