6 starting up the if 961-aio interface submodule, 7 addressing – Siemens Simatic S7-400 User Manual
Page 542
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 S
0/
S
1
) of the analog input/output
module with the ground terminal of the load power supply. Use a cable with a
cross-section of 1 mm
2
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 C000
H
).
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
00
H
ADC data channel 0 (2
0
- 2
15
)
ADC data channel 0 (2
0
- 2
15
)
02
H
ADC data channel 1 (2
0
- 2
15
)
ADC data channel 1 (2
0
- 2
15
)
04
H
ADC data channel 2 (2
0
- 2
15
)
Reserved
06
H
ADC data channel 3 (2
0
- 2
15
)
Reserved
08
H
Indication of settings such as automatic
conversion, cycle time, interrupt enable
Setting of automatic conversion,
cycle time and interrupt enable
0A
H
Indication of channel number
Output of channel number
0C
H
Indication of end of conversion (EOC)
and voltage fault
Start of analog-digital conversion
0E
H
Reserved
Interrupt acknowledgment