4 setting up communications for modbus – Micromod MOD: 30MLTraining Manual User Manual

Page 117

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Training Manual

PID Loop Lab

6.3.4 Setting up Communications for Modbus

25.

We need to setup communications for communicating with the MOD 30ML instrument so
that we can download the database to the instrument. We will use the built-in RS-232 port
of the instrument to download to the instrument via Modbus.

• Add a MSC block (Modcell serial communications) to the workspace by dragging

it from Algorithms menu. Double-click on it to configure. The properties menu of
the MSC block will display as shown below:

Figure 6 .54.

MSC
Communication
block

• Type a name and description for this block.
• Select RS-232 (built-in) from the drop-down menu in the Type field.
• Leave all other entries in their default values and click on OK to save the

configuration of this block.

26.

Connect the Configured List foreground to the MSC block:

• Make a connection from the CL block by selecting the right angle connection from

the Algorithms window and select CL block’s LISTOUT as the source. Terminate
the connection at the MSC block by connecting it to FGLISTIN. Refer to the
figure below:

6 - 37

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