Rockwell-automation 1771-IFF/A INSTL.INSTR FAST ANALOG INPUT Instrukcja Użytkownika Pobierz pdf (Strona 15)

Publication 1771-IN046B-EN-P - December 2003

Fast Analog Input Module 15

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

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

Word 1

HF EE CS

RTS IS

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 R TS 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.

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

Data underrange for channels

1-16

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

Data overrange for channels

1-16

Underrange b

ts for eachchannel Bit 00 for channel 1 bit 01 for channel 2 etc

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

Underrange

bts

for

each

channel

Bit

for

channel

bit

for

channel

etc

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

0 to 5V dc, 0 to 20mA

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

-5 to +5V dc, -20 to +20mA

-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.

Of fset 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

23 binary, 1ms resolution Time Stamp

24 10 ms resolution Scan time

Description

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

⇓ ⇓ ⇓ ⇓

1 2 ... 10 11 12 13 14 15 16 17 18 19 20

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