Rockwell Automation 2711 MODBUS COMMUNICATIONS FOR PANELVIEW TERMINALS - Manual (Page 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.