User manual

Electro Industries/GaugeTech

Doc # E113-7-07 V1.04 3-6

3.4:

Using

EIG’s

Nexus

Communicator

EXT

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. Be sure to set the

Master Port switch to Network.

Y Note: Be sure to configure the Nexus 1250 Monitor port connected to the Multiplexor to speak

Modbus ASCII. See the Communicator User Manual for details.

1. Before connecting to Substation Multiplexor, use 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).

• ,,,%%%,,, 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 5.6)

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

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

4. Add a Nexus Network Device at the bottom. The protocol should be Modbus ASCII with appropriate

Modbus Slave Device Address, IP Address, and Port Number.

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

Multiplexor while connected. See Section 3.5.