Controller I/O Communication; Harmony Area Controller - ABB Symphony Harmony Series Instruction

Harmony Area Controller

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The controller can read and send I/O block channel data, con-
figuration information, and status over Hnet (Fig. 1-4). The
controller can also simultaneously communicate with rack I/O
devices over the I/O expander bus.
I/O E X PA N D E R BU S
R AC K
I/O M O D U LE
T E R M IN AT IO N
U N IT
Figure 1-4. Controller I/O Communication
Like the bridge controller, the Harmony area controller (HAC)
supports the communications protocol and configuration envi-
ronment necessary to operate the Harmony I/O system. It col-
lects process I/O data, performs control algorithms, and
outputs control signals to final control elements through either
or both Harmony I/O blocks and rack I/O devices (Fig. 1-4).
The controller offers enhanced communications and process
interface abilities. Refer to the Harmony Area Controller
instruction for a detailed description.
Harmony Controllers
H A R M O N Y
C O N T R O LL E R
I/O H N E T
I/O
B LO C K
T 00 5 52 B
Harmony Area Controller Harmony Area Controller Harmony Area Controller
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