Rockwell Automation 2755-SNx Adaptascan Bar Code Readers - Manual (Page 338)

17–16 Communicating with PanelView 900
t
Terminals on a DeviceNet Network
Publication 2755-6.8
Field Description Valid Characters Notes
Array Size The size of the array
•
character arrays are 1-128
characters
•
bit arrays are 1-16 bits
•
the array size must be an integer.
•
do not use blanks, tabs, carriage returns,
non-printable characters
Description The description of the tag Maximum characters = 255
•
any printable
•
do not use tabs, carriage returns, non-printable
characters
•
you can type the information in this field, or use
the description editor.
Address
➀➁
(I/O Slave and
Explicit-Server
Messages Only)
Specifies the data sent to and
from a remote device.
A remote address has the
following format:
I: /
O: /
Note: / is required for Bit
and Bit Array.
Maximum characters = 32
For more information on valid
addresses, refer to your
processor’s user manual.
•
I specifies input data
generated by the PanelView
and sent to a remote device.
•
O specifies output data
received by the PanelView
from a remote device.
do not use blanks, tabs, carriage returns,
non-printable characters
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
•
if the Data Type is bit, enter
either 0 or 1
•
do not use blanks, tabs, carriage returns,
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 the default)
•
if present, a sign for the exponent must
immediately follow the e or E
•
provides a preset value for numeric entry objects
only
•
no entry = default of 0
Scaling
➂
Scale:
‘m’ in y = mx + b
Offset:
‘b’ in y = mx + b
The values you want to use
to convert the current tag’s
processor integer value (‘x’)
to engineering units (‘y’) Maximum characters = 12
•
0 - 9
•
e, E, +, - and period
•
do not use blanks, tabs, carriage returns,
non-printable characters
•
maximum precision for scale is 6 places to right of
decimal point
•
maximum precision for offset is 6 places to right of
decimal point
•
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
Data Entry Limits
➂
Minimum
Maximum
The minimum and maximum
values that can be assigned
to the tag Maximum characters = 12
•
0 - 9
•
e, E, +, - and period
•
do not use blanks, tabs, carriage returns,
non-printable characters
•
maximum precision is 6 places to the right of the
decimal point
•
if present, a sign (+ or -) for the number must be
first (+ is the default)
•
if present, a sign for the exponent must
immediately follow the e or E
➀
Required fields for the Table View
➁
Required fields for the Form View
➁
These fields appear only when the data type is 4BCD, signed integer, unsigned
integer, IEEE Float.