Control Interface; Planning; Mechanical And Electrical Installation - Efb - Daikin ACS320 Operation Manual

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
IMPORTANT
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 .
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Planning

Network planning should address the following questions:
Reference for more
information
Daikin MicroTech
II controls
Mechanical and Electrical Installation –
communicate with the
EFB
MD4 over Modbus
and all parameters
are factory set .
No field adjustments
are recommended .
Drive terminals 23...26 are for RS485 communications .
Not supported by
Daikin
Not supported by
Daikin
BACnet Protocol
Technical Data
page 87
71
• 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?
WARNING
Connections should be made only while the drive is
disconnected from the power source .
• Use Belden 9842 or equivalent . Belden 9842 is a dual
®
twisted, shielded pair cable with a wave impedance of
120 Ω.
• Use one of these twisted shielded pairs for the RS485
link . Use this pair to connect all A (-) terminals together
and all B (+) terminals together .
• Use one of the wires in the other pair for the logical
ground (terminal 26), leaving one wire unused .
• Do not directly ground the RS485 network at any
point . Ground all devices on the network using their
corresponding earthing terminals .
• As always, the grounding wires should not form any
closed loops, and all the devices should be earthed to a
common ground .
• Connect the RS485 link in a daisy-chained bus, without
dropout lines .
• To reduce noise on the network, terminate the RS485
network using 120 Ω resistors at both ends of the
network . Use the DIP switch to connect or disconnect the
termination resistors . See following wiring diagram .
• For configuration information see the following:
— following .
— Activate Drive Control Functions – EFB on
— The appropriate EFB protocol specific technical data.
For example, Modbus Protocol Technical Data on
page 68 — 82
f C
Ieldbus onTrols
page 75 .
OM 1190-1 • MD4 VFD