Publication 1756-UM001E-EN-P - August 2002
16-4
Communicate with a DeviceNet Device
Step 2: Create Aliases
In this step, you convert tags in your programs to aliases for I/O
points (devices). As an alias for an I/O point, each tag:
•
provides a descriptive name for the device that is wired to the
point
•
represents the value of the point. When one changes, the other
reflects the change.
A.
From the
Logic
menu, select
Edit Tags
.
B.
Select the scope of the descriptive tag.
C.
To the right of the tag name, click the
Alias For
cell.
The cell displays a
▼
EXAMPLE
Create aliases
The following logic was initially programmed using descriptive tag names, such as
start
and
motor
. Later, the tags were converted to aliases for the corresponding I/O devices.
start
is an alias for the push button at bit 1 of word 0 of the module
(1756-DNB) in slot 5 of the local chassis. When the push button is
on,
start
is on.
motor
is an alias for the starter contactor at bit 0 of word 0 of the
module (1756-DNB) in slot 5 of the local chassis. When
motor
turns on, the starter contactor turns on.
motor
<Local:5:O.Data[0].0>
motor
<Local:5:O.Data[0].0>
start
<Local:5:I.Data[0].1>
stop
<Local:5:I.Data[0].0>
42435
B.
C.
42421
Содержание controllogix 1756-L63
Страница 1: ...ControlLogix System 1756 L1 L1Mx L55Mxx L63 User Manual Allen Bradley HMIs...
Страница 4: ...Publication 1756 UM001E EN P August 2002 Summary of Changes 2 Notes...
Страница 16: ...Publication 1756 UM001E EN P August 2002 Table of Contents x...
Страница 46: ...Publication 1756 UM001E EN P August 2002 2 4 Download and Go Online over an EtherNet IP Network Notes...
Страница 116: ...Publication 1756 UM001E EN P August 2002 6 16 Communicate with a PanelView Terminal Over a EtherNet IP Network Notes...
Страница 156: ...Publication 1756 UM001E EN P August 2002 8 16 Communicate with 1756 I O over a ControlNet Network Notes...
Страница 184: ...Publication 1756 UM001E EN P August 2002 9 28 Communicate with 1771 I O Over a ControlNet Network Notes...
Страница 200: ...Publication 1756 UM001E EN P August 2002 10 16 Communicate with 1794 I O Over a ControlNet Network Notes...
Страница 218: ...Publication 1756 UM001E EN P August 2002 11 18 Communicate with Another Controller over a ControlNet Network Notes...
Страница 222: ...Publication 1756 UM001E EN P August 2002 12 4 Route PLC 5 Messages Between ControlNet Networks Notes...
Страница 268: ...Publication 1756 UM001E EN P August 2002 15 4 Monitor Connections Notes...
Страница 276: ...Publication 1756 UM001E EN P August 2002 16 8 Communicate with a DeviceNet Device Notes...
Страница 306: ...Publication 1756 UM001E EN P August 2002 18 8 Route PLC 5 or SLC 500 Messages From a DH Network Notes...
Страница 368: ...Publication 1756 UM001E EN P August 2002 22 18 Configure DF1 Master and Slave Communications Notes...
Страница 402: ...Publication 1756 UM001E EN P August 2002 24 22 Program Motion Control Notes...
Страница 408: ...Publication 1756 UM001E EN P August 2002 25 6 Maintain the 1756 BA1 Battery Notes...
Страница 418: ...Publication 1756 UM001E EN P August 2002 B 2 Estimate Execution Time...
Страница 420: ...Publication 1756 UM001E EN P August 2002 C 2 Estimate Memory Use...
Страница 422: ...Publication 1756 UM001E EN P August 2002 D 2 Determine When Data Is Updated Notes...
Страница 424: ...Publication 1756 UM001E EN P August 2002 E 2 Reconfigure an I O module Notes...
Страница 428: ...Publication 1756 UM001E EN P August 2002 4 Index...
Страница 429: ...Publication 1756 UM001E EN P August 2002 Index 5 Allen Bradley HMIs...
Страница 430: ...Publication 1756 UM001E EN P August 2002 6 Index...
Страница 435: ...ControlLogix System User Manual Allen Bradley HMIs...