Rockwell-automation 2711 MODBUS COMMUNICATIONS FOR PANELVIEW TERMINALS Manual de usuario descargar pdf (Pagina 17)

Publication 2711-6.9

Modbus Communications for PanelView Terminals 17

Tag Editor Fields

Field Description Valid Characters Notes

Tag Name Name of tag. Maximum characters = 32

A-Z, a-z, 0-9

hyphen (-), underscore (_),

percent (%)

- Tag name must be unique.

- Can’t start with 0-9, hyphen, or percent

- Tag names are not case sensitive.

- Do not use blanks, tabs, carriage returns

or non-printable characters.

Data Type Data format of tag. Select one of the following:

Bit

4BCD

Unsigned Integer

Signed Integer

IEEE Float

Bit Array

Character Array

Data type must be compatible with the

data format selected in the object’s

dialog.

Array Size Size of array. Character arrays are 1-128

characters

Bit arrays are 1-16 bits

- Displays only if Bit Array or Character

Array are selected.

- Array size must be an integer.

- A Modbus bit array can start at any input

or coil address regardless of the word

boundaries.

- Do not use blanks, tabs, carriage returns

or non-printable characters.

Description Description of tag. Maximum characters = 255

Any printable character

Do not use tabs, carriage returns or

non-printable characters.

Node Name Name of node (device) assigned to tag. Pull down list of previously

defined nodes.

Each node name is associated with a

node address.

Tag Initial Value The starting value for the current tag in

engineering units (used only for write

tags).

Maximum characters = 24

0 - 9

e, E, +, - and period

0 or 1 for bit data type

- Do not use blanks, tabs, carriage returns

or non-printable characters.

- Maximum precision is 6 places to the

right of the decimal point for non-floating

point values.

- If present, a sign (+ or -) for the number

must be first (+ is default).

- If present, a sign for the exponent must

immediately follow the e or E.

- No entry = default of 0.

Tag Address Address of the data in the slave device. 0 to 65535 - Do not use blanks, tabs, carriage returns

or non-printable characters.

- A Modbus bit array can start at any input

or coil address regardless of the word

boundaries.

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