Setting the i/o configuration, Setting the i/o configuration -5 – Rockwell Automation 20-COMM-H RS485 HVAC Adapter FRN 2.xxx User Manual

Page 27

Configuring the Adapter

3-5

20-COMM-H RS-485 HVAC Adapter User Manual

Setting the I/O
Configuration

The I/O configuration determines the data that is sent to and from the drive.
Logic Command/Status, Reference/Feedback, and Datalinks may be
enabled or disabled. A “1” enables the I/O. A “0” disables the I/O.

1. Set the bits in Parameter 16 - [DPI I/O Cfg].

Figure 3.5

Example DPI I/O Cfg Screen

Bit 0 is the right-most bit. In

Figure 3.5

, it is highlighted and equals “1.”

2. If Logic Command/Reference is enabled, configure the parameters in

the drive to accept the Logic Command and Reference from the adapter.
For example, set Parameter 90 - [Speed Ref A Sel] in a PowerFlex 70 or
700 drive to “22” (DPI Port 5) so that the drive uses the Reference from
the adapter. Also, verify that the mask parameters (for example,
Parameter 276 - [Logic Mask]) in the drive are configured to receive the
desired logic from the adapter. Refer to the documentation for your
drive for details.

3. If you enabled one or more Datalinks, configure parameters in the drive

to determine the source and destination of data in the Datalink(s). For
example, configure the Datalinks in PowerFlex 70 and 700 drives by
setting Parameters 300 - [Data In A1] to 317 - [Data Out D2]. Also,
ensure that this adapter is the only adapter using the enabled
Datalink(s).

4. Reset the adapter (see

Resetting the Adapter on page 3-8

The adapter is ready to send and receive I/O. The following chapters
provide information about basic data transfer for each type of protocol.

For details about using Datalinks for all types of networks, refer to

Chapter 7

Using Datalinks with All Protocols

Network

Refer to…

Modbus RTU

Chapter 4

Using Modbus RTU

Metasys N2