Bit definitions for instance attribute 4 – Rockwell Automation 1336-GM6 Enhanced DeviceNet Communications Module User Manual

Page 120

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C-12

DeviceNet Objects

Bit Definitions for Instance Attribute 4

15

Get

Full

Scaling Base

UINT

Base for scaling formula.

16

Get

Full

Scaling Offset

UINT

Offset for scaling formula.

17

Get

Full

Multiplier Link

UINT

Parameter object instance number of
multiplier source.

18

Get

Full

Divisor Link

UINT

Parameter object instance number of base
source.

19

Get

Full

Base Link

UINT

Parameter object instance number of offset
source.

20

Get

Full

Offset Link

UINT

Parameter object instance number of offset
source.

21

Get

Full

Decimal Precision

USINT

Specifies number of decimal places to use
when displaying the scaled engineering
value. Also used to determine actual
increment value so that incrementing a value
causes a change in scaled engineering value
to this precision.

Attribute ID

Access Rule

Stub/Full

Name

Data Type

Description

The access rule is defined in bit 4 of instance attribute 4, the Descriptor. If bit 4 is 0 the access rule is Set and the Parameter Value can be read and
written. If bit 4 is 1, the access rule is Get and the Parameter Value can only be read.

Data type specified in instance attributes 4 (Descriptor), 5 (Data Type) and 6 (Data Size).

Bit

Definition

Value

0

Supports settable path

0 = Link path can not be set.
1 = Link path can be set.

1

Supports enumerated strings

0 = Enumerated strings are not supported.
1 = Enumerated strings are supported and may be read with the Get_Enum_String service.

2

Supports scaling

0 = Scaling not supported.
1 = Scaling is supported. The scaling attributes are implemented and the value presented is
in engineering units.

3

Supports scaling links

0 = Scaling links not supported.
1 = The values for the scaling attributes may be retrieved from other parameter object
instances.

4

Read only parameter

0 = Parameter value attribute can be written (set) and read (get). Access rule is set.
1 = Parameter value attribute can only be read. Access rule is get.

5

Monitor parameter

0 = Parameter value attribute is not updated in real time by the device.
1 = Parameter value attribute is updated in real time by the device.

6

Supports extended precision
scaling

0 = Extended precision scaling is not supported.
1 = Extended precision scaling should be implemented and the value presented to the user
in engineering units.

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