181
Communication operation and setting
4.17 Communication operation and setting
4.17.1 Wiring and configuration of PU connector
Using the PU connector, you can perform communication operation from a personal computer, etc.
When the PU connector is connected with a personal, FA or other computer by a communication cable, a user program can
run and monitor the drive unit or read and write to parameters.
(1) PU connector pin-outs
Purpose
Parameter that should be Set
Refer to Page
Communication operation from
PU connector
Initial setting of computer link
communication (PU connector)
Pr. 117 to Pr. 124
MODBUS RTU communication
specifications
Pr. 117, Pr. 118, Pr. 120,
Pr. 122, Pr. 343, Pr. 502,
Pr. 549, Pr. 779
Restrictions on parameter write
through communication
Communication EEPROM write
selection
Pr. 342
Operation selection at a
communication error
Stop mode selection at
communication error
Pr. 121, Pr. 122, Pr. 502, Pr. 779
Pin Number
Name
Description
1)
SG
Earth (ground)
(connected to terminal 5)
2)
—
Parameter unit power supply
3)
RDA
Drive unit
4)
SDB
Drive unit send-
5)
SDA
Drive unit send+
6)
RDB
Drive unit receive-
7)
SG
Earth (ground)
(connected to terminal 5)
8)
—
Parameter unit power supply
NOTE
Pins No. 2 and 8 provide power to the parameter unit. Do not use these pins for RS-485 communication.
When making RS-485 communication between the FR-D700-G series, FR-E500 series, FR-S500 series and FR-F500J
series, incorrect connection of pins No.2 and No.8 (parameter unit power supply) of the above PU connector may
result in the drive unit malfunction or failure.
When multiple drive units are connected using pins No.2
and No.8, power is provided from the drive unit which is
powered ON to the drive units which are powered OFF in
case drive units which are powered ON and OFF are
mixed. In such case, a protective circuit of the drive unit,
which is ON, is activated to stop communication.
When connecting multiple drive units for RS-485
communication, make sure to disconnect cables from
No.2 and No.8 so that pins No.2 and No.8 are not
connected between drive units.
When using the RS-485 converter which receives power
from the drive unit, make sure that power is provided from
one drive unit only. (
Refer to the figure below.
)
Do not connect the PU connector to the computer's LAN board, FAX modem socket or telephone modular connector.
The product could be damaged due to differences in electrical specifications.
8)
1)
to
Drive unit
(receptacle side)
viewed from bottom
PU
connector
PU
connector
PU
connector
Drive unit,
Inverter
Drive unit,
Inverter
Drive unit,
Inverter
Protective
circuit
operation
(shut-off)
Communication
stop
When pins No.2 and No.8 are connected
ON
OFF
OFF
Power supply
Computer
Terminating resistor
PU
connector
PU
connector
PU
connector
Drive unit
Drive unit
Drive unit
Connect pins No.2 and No.8
of one drive unit and a converter only.
Do not connect pins No.2 and No.8
of the other inverters.
Station 1
Station 2
Station n
RS-232C RS-485
converter
RS-232C
connector
Distributor
Power supply
Summary of Contents for FR-D720-0.2K-G
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