Rockwell-automation 1771-IFE/C INSTL.INSTRUCTIONS ANALOG INPU Manual de usuario descargar pdf (Pagina 11)

Analog Input Module 11

Publication

17715.45 - July 1997

Use the following table to read data from your input module.

Dec. Bits 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Description

Octal Bits 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00

Description

Word 1 HF EE CS RTS IS OR PU Diagnostics

Hardware fault - (HF) When this bit is set, the dc/dc

converter fuse has blown. Digital logic will continue

to operate.

EEPROM status bit - (EE) This bit is set if an error occurs

saving calibration data to nonvolatile memory. If this bit is set

at powerup, the data from the EEPROM did not pass the

checksum and no calibration values are used.

Calibration status bit - (CS) When calibrating the

module, this bit will be cleared if the calibration was

successful. If the bit is set, an incorrect voltage/current

was applied, or offset and gain calibrations were

attempted simultaneously.

Real time sample fault bit - (RTS) This bit is set if the module is

configured for RTS and a block transfer read has not occurred within

the user-programmed period.

Power up bit - (PU) Used by the

module to tell the processor that it is

alive but not yet configured. It is a key

element in the application program.

Out of range bit - (OR) This bit is sent to

tell the processor that one or more

channels are either over or under range.

Invalid scaling bit - (IS) This bit reports that the

scaling is somehow invalid. Usually, both values

are equal or minimum is greater than maximum

when this bit comes on. Can also be an invalid

filter value.

Octal Bits 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Description

2 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Data underrange for channels 1-16

3 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Data overrange for channels 1-16

Underrange bits for each channel. Bit 00 for channel 1, bit 01 for channel 2, etc.

These

to 5V dc, 4 to 20mA (default)

errange

or eac

anne

or c

anne

or c

anne

, etc.

ese

bits are set (1) at approximately the input range limits shown on the right.

to 5V dc, 0 to 20mA

bits are set (1) at approximately the input range limits shown on the right.

Overrange bits for each channel. Bit 00 for channel 1, bit 01 for channel 2, etc.

These

bits are set (1) at approximately the input range limits shown on the right

5 to +5V dc, 20 to +20mA

g ,,

bits are set (1) at approximately the input range limits shown on the right.

10 to +10V dc, 0 to 10V dc

4 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

Polarity bits - Set when input is less than zero. Bit 00 for channel 1, bit 01 for channel

2, etc.

Data polarity for channels 1-16

5 Channel 1 Input Channel 1 Input

6 Channel 2 Input Channel 2 Input

7 Channel 3 Input Channel 3 Input

8 Channel 4 Input Channel 4 Input

⇓⇓⇓⇓

20 Channel 16 Input Channel 16 Input

21 Offset calibration results bits - Each bit represents a channel. After a calibration BTW

has been sent, the module confirms calibration by echoing back the channels that were

calibrated during the offset calibration BTW. In differential mode, channels 09 thru 16

are zero.

Offset Calibration Results

22 Gain calibration results bits - Each bit represents a channel. After a calibration BTW

has been sent, the module confirms calibration by echoing back the channels that were

calibrated during the gain calibration BTW. In differential mode, channels 09 thru 16

are zero.

Gain Calibration Results

Attention: If

an input terminal'

s voltage exceeds +

14.25V as referenced to module common, channeltochannel crosstalk can cause invalid input readings and invalid

underrange/overrange bits.

1 2 ... 6 7 8 9 10 11 12 13 14 15 16

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