Yokogawa PR300 Power and Energy Meter - Manual (Page 16)

<Toc> <Ind> <2. Setup>
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IM 77C01E01-10E
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Protocol (COMM)
Set the communication protocol identical to that of the higher-level device to be connected.
●
Station number (ST-NO)
Set the station number of the PR300 itself. A station number of 01 to 99 may be assigned
in any order. However, the maximum number of PR300 to be connected to a single com-
munication port is 31.
When connecting two or more PR300 to a single communication port, set a different station
number to each.
Example of connecting a higher-level device with four PR300 having station numbers 01,
05, 10, and 20
Higher-level device
Station number 01
(arbitrary)
Station number 05
(arbitrary)
Station number 10
(arbitrary)
Station number 20
(arbitrary)
Maximum communication distance: 1200 m
Maximum number of slave sations to be connected: 31
(Example)
●
Baud rate (B-RT)
Set the baud rate identical to that of the higher-level device to be connected. (Otherwise,
proper communication cannot be achieved.)
●
Parity (PRI)
Set the handling of parity to be carried out when data is sent or received. Set the parity bit
state identical to that of the higher-level device to be connected.
* When PR201 original is selected for the protocol, select NONE for the parity.
●
Stop bit (STP)
Set the stop bit identical to that of the higher-level device to be connected.
* When PR201 original is selected for the protocol, select 1 for the stop bit.
●
Data length (DLN)
Set the same data length as for the upper device that is to be connected.
* When Modbus/RTU is selected for the protocol, select 8 for the data length.
* When PR201 original is selected for the protocol, select 8 for the data length.