64
41-621.1 HART
®
to Modbus
®
Adaptor Operating Manual
17.
ABB Totalflow XRC
–
Modbus RTU / ASCII
The following procedure applies to operation with both RTU and ASCII communication. The choice of
communication protocol is made in step 17.1.1 for the HMA settings and in step 17.3.10 for the ABB
Totalflow XRC. The Modbus RTU protocol is used for the following.
17.1.
Initial HMA Configuration
17.1.1
Using Procedure 1, ensure that registers 3000 through 3007 of the HMA match the values
desired for Modbus communication with the XRC. Refer to Appendix F for the HMA
Communication settings. If the settings do not match, double-click on a value that needs
to be changed in order to open the Write Single Register dialog, enter the new value, and
then click on Send.
17.2.
Physical Connections
17.2.1
Connect the XRC to a computer using a USB-A to USB-B cable.
17.2.2
Connect an appropriate power supply to the battery terminal (J16) of the XRC.
17.2.3
Connect the HMA to a 9
–
30 VDC power supply via terminal block TB1.
17.2.4
Connect an RS-485 communications cable between the COM1 terminal block (lower
position of J6) of the XRC and the RS-485 terminal block (TB2) of the HMA. The RS485+
terminal of the HMA should be connected to the BUS+ of the TotalFlow terminal block.
The
–
terminals should be connected correspondingly. See section 17.3.11.
17.2.5
Ensure that the appropriate communication module is inserted into the Comm 1
receptacle (XA1).
17.2.6
Connect a 120
resistor between the two RS-485 terminal block positions of the last HMA
on the bus.
17.3.
Initial XRC Configuration
17.3.1
Start the PCCU32 application.
17.3.2
Select on Operate \ Setup \ System Setup in the PCCU32 Menu bar. A dialog will appear
allowing for communication settings between the PCCU32 application and the XRC.
Summary of Contents for Jupiter JM4
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