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WHEN RS-422/485 FOUR-WIRE OPERATION IS SELECTED:
When
RS-422/485 four-wire operation
is selected the RS-422/485 switch on the
MES1B must be in the left position.
WHEN RS-485 TWO-WIRE OPERATION IS SELECTED:
CP1 (configured in the next section under Modem/Configurable Pin
Settings) must be enabled to ensure Send Data control is implemented.
The RS-422/485 switch on the MES1B must be in the right position.
The multidrop bus is connected to Terminals 3 [DataB(+) to TDB(+)
terminal] and 4 [DataA(-) to TDA(-) terminal].
No jumpers are required to bridge transmit and receive lines on the
terminal block
SERIAL PARAMETERS
MES1A/B Serial Parameters must be set up to match the parameters of the Modbus
device connected to its serial interface. MES1A/B Serial Parameter options include:
Data rates from 300 bps to 115200 bps
7 or 8 data bits
No, Even or Odd parity
1 or 2 stop bits.
To configure Serial Parameters:
31.
At the
Enter serial parameters (9600,8,N,1)
prompt
o
To keep the current setting, press
Enter
