Rockwell-automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Manual do Utilizador descarregar pdf (Página 77)

Publication 1794-UM065B-EN-E - September 2010

1794-IF8IH and 1794-OF8IH Configuration 65

Default: 0

HART Disable Channel 0 to 7 (8 of 1 bit)

When this bit is set, the I/O module is inhibiting its HART Communication.

Range: 0=Enable, 1=Disable

Default: 0

HART Current Fault Limit (8 of 5 bits)

Delivers the percentage value (in steps of 1%, starting @ 5%) of the threshold

for causing a HART current fault indication (input signal deviation HART/

Analog) = 31% maximum deviation.

If there is no HART transmitter on the loop or the loop is not in the

transmitter list the function is switched off internally in the I/O module.

Range:

0=Disabled,

1…4=Not supported by the I/O module. A configuration request of 1…4

causes a value of 5 to be utilized by the module.

5…31=Percentage threshold data (5…31%)

Default: 0

Analog Data Format (8 of 4 bits each)

Specifies the module data format for a channel. Formats 2, 5, 6, 8, 9, 10, 12

and 15 are not assigned.

If a module channel has never been configured then it can be assumed to have

the default configuration Analog Data Format "0", 0…20mA and Analog

Mode Fault State minimum range. If a non-assigned format is selected, then

the diagnostic "2" for configuration failure is set and the module channel goes

to the default fault state minimum range.

If, on the other hand, the configuration is changed from the default, and then

changed again to a non-assigned format, then the diagnostic bit "2" for

configuration failure is set and the module goes to the fault state for the last

valid configuration.

Formats 13 and 14 are 2's complement data formats, and require data to the

module in that form.

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 163 164

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Rockwell-automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Manual do Utilizador Página 77