Siemens Simatic S7-300 Manual - Página 22

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Channel groups

The channels of the SM 331; AI 8 14 Bit High Speed are arranged in four

groups of two. You can only ever assign parameters to one channel group.

The SM 331; AI 8

channel group.

The table below shows which channels are parameterized as a channel group in

each case. You will need the channel group number to set the parameters in the

user program with an SFC.

Table 9

Channels ...

Channel 0

Channel 1

Channel 2

Channel 3

Channel 4

Channel 5

Channel 6

Channel 7

Special characteristic of channel groups for hardware interrupts

You can set hardware interrupts in STEP 7 for the channel groups 0 and 1. Note,

however, that a hardware interrupt is set only for the first channel in the channel

group in each case – in other words, for channel 0 or channel 2.

Diagnostics

You will find the diagnostic messages that are grouped under the "group diagnosis"

parameter in Table 4-47 on page 4-73 of the reference manual.

14 Bit High Speed has a measuring range module for each

Assignment of the channels of the SM 331; AI 8

channel groups

Product Information on the Manual S7-300 Module Specifications, Edition 11/2002

14 Bit High Speed to

... form one Channel Group each

Channel group 0

Channel group 1

Channel group 2

Channel group 3

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