Technical Specifications

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Configuring the Multiplexor
1. Select MUX Setup from the context menu to setup the nodes used on the MTL multiplexor.
The Connected Devices page appears and prompts for the nodes to be configured.
2. Type a number between 1 and 31 for the desired node, e.g. 1 for node 1 and select OK. The
node address must match the DIP switch setting on the MUX hardware.
The Multiplexor Setup dialog appears (Figure 59).
3. Set the Master Mode: Primary or Secondary Master.
NOTE ValVue ESD must be configured to be the same type of master as
the multiplexor. Use both the Options setup and Mux setup
screens to check and compare the selection. Both can be primary
or both can be secondary.
The multidrop option substantially increases the time required to scan each node of the Mux.
Multiplexor Options Setup Dialog
Use this procedure to setup Multiplexor options.
1. Right-click in the Connected Devices page and select Set Options.
2. Check the Use Multiplexor box on the Options page.
3. Select which communication serial port the computer uses for the HART communication
channel. Once selected in the Options dialog, this selection overrides any selection on the
command line that starts the program.
4. Select the baud rate to match that set with dip switches on the multiplexor hardware.
The device list is automatically saved to the device database. This file is read whenever the
program is started and the saved device list appears. This is particularly useful for a
multiplexor connected to many devices and saves the time required to re-scan.
Tag This is a user-entered value of up to 7 characters, used to identify the
MTL multiplexor node in the system. The tag appears in Device List
box in Connected Devices page.
Descriptor A description with up to 15 characters for the MTL multiplexor node.
Retry Count The number of times the multiplexor retries sending a command to a
Hart device before returning with an error. The valid range for this
number is 0 to 5. The recommended number is ‘3’.