4.18 Communication Operation And Setting; 4.18.1 Wiring And Configuration Of Pu Connector - Mitsubishi Electric FR-E700EX Instruction Manual

4.18 Communication operation and setting

Purpose
To perform communication
operation from PU connector
To restrict parameter write through
communication

4.18.1 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
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 with a combination of the FR-E700EX series, FR-E500 series, and FR-S500
series, incorrect connection of pins No.2 and 8 (parameter unit power supply) of the above PU connector may result
in a malfunction or failure of the inverter or drive unit.
 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 a case, a protective circuit of the drive unit, which is
ON, functions 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.
Initial setting of computer link
communication (PU connector)
Modbus-RTU communication
specifications
Communication EEPROM write
selection
Drive unit
(receptacle side)
Front view
1) to 8)
Computer
Station 1
RS-232C
Drive unit
connector
PU
connector
RS-232C RS-485
converter
Distributor
Connect pins No.2 and No.8
of one drive unit and a converter only.
: Power supply
Communication operation and setting
Parameter to set
Pr.117 to Pr.124
Pr.117, Pr.118, Pr.120,
Pr.122, Pr.343, Pr.502,
Pr.549
Pr.342
Pin Number Name
1) SG

2)
3) RDA
4) SDB
5) SDA
6) RDB
7) SG

8)
When pins No.2 and No.8 are connected
ON
Protective
circuit
Drive unit
operation
PU
(shut-off)
connector
Communication
stop
Station 2 Station n
Drive unit Drive unit
PU PU
connector connector
Terminating resistor
Do not connect pins No.2 and No.8
of the other drive units.
Refer to page
204
222
208
Description
Earth (ground)
(connected to terminal 5)
Parameter unit power supply
Drive unit receive+
Drive unit send-
Drive unit send+
Drive unit receive-
Earth (ground)
(connected to terminal 5)
Earth (ground)
(connected to terminal 5)
OFF OFF
Drive unit Drive unit
PU PU
connector connector
: Power supply
201
4