A3. POWER SUPPLY TO COMPUTER CONNECTION
A-7
Power Supply Unit
INSTRUCTION MANUAL
A
A3.
POWER SUPPLY TO COMPUTER CONNECTION
A3.1 Communication Cable Connection
Turn off the power supply unit and the computer to be connected. Connect the RS-232C
connector on the power supply unit front panel or the RS-485 connector on the rear panel (refer
to section 2.2 in this document, "Power Supply Unit") to the communications port of the computer
with a cable, referring to section A2.
A3.2 Serial Communications Baud Rate Configuration
Check with a baud rate of a computer connected to, and set up a baud rate of RS-232C or RS-
485. See Section 6.6 "Software Operation" (4) for details about the setting method.
A3.3 RS-485 Multi-drop Settings
The RS-485 interface multi-drop function is used to connect multiple power supply units to a
single computer. Turn off the multi-drop function if the RS-485 is used instead of RS-232C to
extend the communication cable length.
When the multi-drop function is turned on, the network ID portion of the sent character strings
(see Section A4) is enabled and the event communication function that notifies the power supply
unit status to the connected computer is disabled.
Set up the RS-485 as described below when using a multi-drop connection.
(1) Turn On the Multi-drop Function
Turn ON the multi-drop function using setting mode/RS485 setting/multi-drop setting on
the LCD display. See Section 6.6 "Software Operation" (4) for details about the setting
method.
(2) Setting the Network ID
The network ID is set using setting mode/RS485 setting/network ID setting on the LCD
display to designate which power supply connected via the multi-drop connection the
computer is sending commands to.
The network ID is set as a number between 01 and 32, and must be unique for each power
supply connected to a computer. See Section 6.6 "Software Operation" (4) for details about
the setting method.
When the RS-485 interface multi-drop function is turned ON, the event sending function
(See A6.5) will be disabled, regardless of the SETTINGS/RS485/EVENT SENDING menu
settings on the LCD display.
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