Energy Meter Manual

3-6
IM 77C01E01-01E
3.4 Setting RS-485 Communication Conditions
This section explains how to set RS-485 communication conditions by taking as an example the case
when the protocol is changed from the initial value to Modbus/RTU.
Operation
Operation
VT Ratio screen
2
RS-485 Communication
Menu screen
3
Station Number screen
Baud rate Parity Stop bit Data length
4
5
Protocol screen
Protocol Setting screen
6
Protocol Setting screen
Protocol Setting screen
Each press of cycles through the parameter
options, as shown below.
Refer to “Parameter Setting Types and Ranges” on the next
page to set other parameters in the same manner.
To return to the RS-485 Communication
Menu screen, press .
Using or ,
show .
Measured Value screen
1
The parameter (VT ratio)
appears.
Press once.
Press once.
Press once.
The parameter
(station number) appears.
The parameter
(protocol) appears.
The screen changes to the one
for setting the parameter .
7
8
Protocol screen
Hold down for at
least 3 seconds.
Current value
Setpoint
Using or ,
select the setpoint.
To return to the Measured Value
screen, hold down .
If you do not operate any key for more
than 5 minutes on the Parameter
screen, the PR300 automatically
returns to the Measured Value screen.
Press once to
blink the setpoint.
Press once while
the setpoint is blinking.
The setpoint is confirmed and the
PR300 returns to the Protocol screen.
Protocol setting completed.
To re-set the parameter:
Press any key other than
while all digits of the
setpoint are blinking.
The PR300 returns to the initial
setting screen.