User manual

eElectro Industries/GaugeTech Doc # E113-7-03-1.18 2-7

2.4: Using EIG’s Nexus Communicator with the Substation Multiplexor2.4: Using EIG’s Nexus Communicator with the Substation Multiplexor

Put the Substation Multiplexor into Command Mode first so a data string can be recognized by the

Substation Multiplexor. The data string tells the Substation Multiplexor what Slave Port to use and

then instructs it to enter Throughput Mode so data transmission may begin.

v Note: Be sure to configure the Nexus 1250/1252 Monitor port connected to the Multiplexor to speak

Modbus ASCII. See the Nexus Communicator User Manual for details.

1. Before connecting to Substation Multiplexor, use Nexus Communicator’s Connection Manager to

edit the location where the Substation Multiplexor is installed:

2. Click the Use Data Switch String box.

3. In the Data Switch Connect field, type: ,,,%%%,,,<Enter>,,PTnn<Enter>,,, (where nn is the Slave

Port you wish to use). Each line should end with <Enter> (<Enter> means the “Enter” key.)

• ,,,%%%,,, will put the SM1-16 into Command Mode.

• , instructs Nexus Communicator to pause for one second.

• PT is the Select Port and Go to Throughput Mode command (see section 2.6)

• nn represents the number of the Slave Port to which you wish to connect.

• ,,, instructs Nexus Communicator to pause for three seconds.

4. After the connection is established, use Low Level Access to send other commands to the Substation

Multiplexor while connected. See section 2.5.