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Communications Adapter Register Mapping

2.1 I/O words and ID–code

After the I/O module is powered–up, the identification code (ID code) of the

module base is automatically read by the communication adapter. The ID–code

provides the Interbus master with the type of data (input or output) and the number

of words in the message for each module. After the I/O modules identification

codes are received, the Interbus master will automatically begin the execution of

I/O data communication in real time.

The length is in each case expressed in I– or O–words, with the higher number

being the decisive factor. The number of words it can contain is: 1 to 10, 12, 14,

16, 24 or 32 words.

The ID–code for the 170 ADM 350 10 is 0103 hex.

H 01 = Length statement, indicating that the module needs one word (I–

or O–word) for data transfer

H 03 = Module Type, indicates that this module has inputs and outputs

Table 2 I/O Base Word Number and ID Code (analog I/O bases)

Description

Function I–Words O–Words ID Code

170 AAI 140 00 16 input channels 16 4 1033 hex

1651 dec

170 AAI 520 40 4 input channels, RTD, Therm. 4 4 0433 hex

0451 dec

170 AAO 120 00 4 output channels, 0 ... 20 mA 5 0531 hex

0549 dec

170 AAO 921 00 4 output channels, 4 ... 20 mA 5 0531 hex

0549 dec

170 AMM 090 00 4 inputs, 2 outputs (discrete)

4 input & 2 output channels (ana-

log)

0533 hex

0551 dec

Example

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 35 36

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Schneider Electric INTERBUS Basic Manuale Utente Pagina 18