Wiring; System Configuration Example - Mitsubishi Electric FR-A7NL Instruction Manual

3

WIRING

3.1 System Configuration Example

(1) Mount the communication option (FR-A7NL) on the inverter. (Refer to page 6.)
(2) Connect the LONWORKS node, option unit, network management
computer, and terminating resistor with the cable for LONWORKS
communication.
Select a terminating resistor so that resistance values of R of the RC
network are the same as shown below.
⋅ Free topology (Refer to page 4) ......................... R = 52.3Ω
⋅ Bus topology (Refer to page 4) .......................... R = 105Ω
(3) Install the network management tool on the network management computer
to assign the network address and bind (association function) the network
variable, etc. to the LONWORKS node.
(Example) Bus topology (without stub)
Network
management
Terminating
computer
resistor
NETA
REMARKS
·
The network management tool is not included with this product. Please purchase it separately.
For the network management tool, LonMaker
·
When the option unit has been replaced because of a fault or others, perform "Commission" or "Replace" from the
network management tool after switching on the inverter. After performing "Commission" or "Replace", reset the
inverter (switch power off once, then on again or turn the RES signal on).
· Use the network management computer in the earthed status. Use the isolated power supply if the computer can not
be earthed.
LONWORKS LONWORKS
node node
NETB NETA NETB NETA
TM
by Echelon
±
1% 1/8W
±
1% 1/8W
Inverter
FR-A7NL FR-A5NL
Terminating
NETA NETB
NETA NETB
NETB

Co. is recommended.
+
C1
Minimum 100 F, 50V(min)
R
Network connection
Minimum 100 F, 50V(min)
+
C2
RC network
resistor
LOMWORKS cable
(twisted pair cable)
3
7