G - tags and data types, Tags and data types, Appendix – Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL User Manual

Page 301

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Appendix

G

Publication 2706-817

Tags and Data Types

Read tags are controlled by the PLC. For Remote I/O, read tags are
Output or BTW.

Tag

Type

Purpose

Range

Acknowledge Handshake

Bit

A bit that when set informs the terminal that the Acknowledge bit
and Acknowledge Return Number have been acquired by the
controller. Use of the Acknowledge Handshake is optional.+

0, 1

ASCII Display

Character Array

A string of ASCII characters that is scanned whenever a message
with an embedded ASCII Variable Display is triggered. An ASCII
Display tag is required for every embedded ASCII Variable Display
in the application.

An array of
characters.

ASCII Entry Handshake

Bit

A bit that when set informs the terminal that the ASCII Variable
Entry and Message Return Number have been acquired by the
controller. Use of the Numeric Entry Handshake is optional.

0, 1

Bit trigger

Unsigned Integer

The first word of a bit sequence for triggering messages by their
bit number. The bit sequence is up to 64 words long. The terminal
continuously scans the bit sequence whenever one or more
bit-triggered messages exist in the application.

Bit position

0-1023

(Latched) Function Key Handshake

Bit

A bit that when set returns a Latched Function Key to the
de-energized state. Every Latched Function Key in the application
requires a corresponding Handshake tag.

0, 1

LED Indicator

Bit

A bit that controls an LED indicator on the 2706-M1F1 terminal.
One bit is optionally assigned to each LED indicator in the
application. The terminal continuously scans the LED indicator
tags whenever they are assigned.

0, 1

Numeric Display

Signed Integer,

Unsigned

Integer, or BCD

A numeric value that is scanned, formatted and displayed
whenever a message with an embedded Numeric Variable Display
is triggered. A Numeric Display tag is required for every embedded
Numeric Variable Display in the application.

Depends on

the type.

Numeric Entry Handshake

Bit

A bit that when set informs the terminal that the Numeric Variable
Entry and Message Return Number have been acquired by the
controller. Use of the Numeric Entry Handshake is optional.

0, 1

Special Message 9905: Year

Unsigned Integer

A value for setting the year of the Real-Time Clock in the terminal.
The value is acquired when Special Message 9905 (Set
Time/Date) is triggered.

0-2035

Special Message 9905: Month

Unsigned Integer

A value for setting the month of the Real-Time Clock in the
terminal. The value is acquired when Special Message 9905 (Set
Time/Date) is triggered.

0-12

Special Message 9905: Day

Unsigned Integer

A value for setting the day of the Real-Time Clock in the terminal.
The value is acquired when Special Message 9905 (Set
Time/Date) is triggered.

0-31

Special Message 9905: Hour

Unsigned Integer

A value for setting the hour of the Real-Time Clock in the terminal.
The value is acquired when Special Message 9905 (Set
Time/Date) is triggered.

0-23

Special Message 9905: Minute

Unsigned Integer

A value for setting the minute of the Real-Time Clock in the
terminal. The value is acquired when Special Message 9905 (Set
Time/Date) is triggered.

0-59

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