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Overview
The MD5 can be set up to accept control from an external
system using standard serial communication protocols . When
using serial communication, the ACH550 can either:
• Receive all of its control information from the fieldbus, or
• Be controlled from some combination of fieldbus control
and other available control locations, such as digital or
analog inputs, and the control panel .
Figure 6: MD5 Connections
Control Interface
In general, the basic control interface between the fieldbus
system and the drive consists of:
Protocol
Control Interface
• Output Words
– Control word
– Reference1
– Reference2
• Input Words
– Status word
– Actual value 1
Modbus
– Actual value 2
– Actual value 3
– Actual value 4
– Actual value 5
– Actual value 6
– Actual value 7
– Actual value 8
• Binary output objects
• Analog output objects
N2
• Binary input objects
• Analog input objects
• Binary output points
• Analog output points
FLN
• Binary input points
• Analog input points
• Device management
• Binary output objects
BACnet
• Analog output objects
• Binary input objects
• Analog input objects
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Reference for more information
The content of these words is defined
by profiles. For details on the profiles
used . The MicroTech III control and
the MD5 communicate over Modbus .
All Modbus values are factory set and
tested .
N2 protocol technical data
FLN protocol technical data
BACnet protocol technical data
Two basic serial communications configurations are available:
• Embedded fieldbus (EFB) – Using the RS485 interface
at terminals X1:28...32 on the control board, a control
system can communicate with the drive using any of the
following protocols:
— Modbus
®
— Metasys
N2
®
— APOGEE
FLN
®
— BACnet
®
• Fieldbus adapter (FBA) – See section
on page
67 .
NOTE: The words "output" and "input" are used as seen from
the fieldbus controller point of view. For example an
output describes data flow from the fieldbus controller
to the drive and appears as an input from the drive
point of view .
Planning
Network planning should address the following questions:
• What types and quantities of devices must be connected
to the network?
• What control information must be sent down to the
drives?
• What feedback information must be sent from the drives
to the controlling system?
45
e
f
Mbedded
ieldbUs
e
f
Mbedded
ieldbUs
Fieldbus Adapter
OM 1191 • MD5 VFD
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