Configuring the MES1A/B
Manual Documentation Number: MES1A/MES1B-2106m PN7138-rev001
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30. To accept changes, press Enter
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
o To change the serial parameters, type in new parameters in the
format 9600,8,N,1
32. To accept changes, press Enter
3) Modem/Configurable Pin Settings There is only one configurable setting required in the Modem/Configurable
Pin Settings section of the Configuration Menu. When configuring an