Rockwell-automation 1771-IFE , D17716.5.90 USER MNL. ANALOG INPUT Modu Manual de usuario descargar pdf (Pagina 32)

Module Configuration

Chapter 4

4-3

You can select single-ended or differential inputs using the designated bit

in the configuration file. Inputs to a particular module must be all

single-ended or all differential. Set BTW word 3, bit 08 (bit 10 octal) as

shown in Table 4.C.

Table 4.C

Selecting

Singleended or Differential Inputs

Decimal Bit 8

(Octal Bit 10)

Input type

1 differential inputs

0 singleended inputs

You must also indicate what format will be used to read data from your

module. Typically, you select BCD with PLC-2 processors, and 2’s

complement binary with PLC-3 and PLC-5 processors. See Appendix C

for details on data format. You use BTW word 3 bits 09-10 (11-12 octal) to

set the data format (Table 4.D).

Table 4.D

Selecting

the Data Format

Decimal Bit 10

(Octal Bit 12)

Decimal Bit 09

(Octal Bit 11)

Data Format

0 0 BCD

0 1 not used

1 0 two's complement binary

1 1 signed magnitude binary

Input Type

Data Format

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 62 63

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Rockwell-automation 1771-IFE , D17716.5.90 USER MNL. ANALOG INPUT Modu Manual de usuario Pagina 32