41-621.1 HART
®
to Modbus
®
Adaptor Operating Manual
81
18.
ABB Totalflow XRC
–
LevelMaster
The ABB Totalflow XRC is only capable of sending and receiving command Uxx?. Note that with the
LevelMaster protocol, the HMA operates only in the Device mode. Therefore, the ID in the request
blocks must be set to the attached HART device’s Poll Address rather than that of the HMA. The XRC
displays the first float value returned by Command Uxx? as Level 1 (the Upper Level for Magnetrol
Devices) and the second float value as Level 2 (typically the Interface Level for Magnetrol devices).
Accordingly, it is recommended to configure the attached Magnetrol HART device for PV as Level, and
SV as Interface level. The Echo Strength from the attached transmitter is displayed as the Temperature
in the tank view diagram of the Communications \ LevelMaster menu in the PCCU application.
18.1.
Initial HMA Configuration
18.1.1
Using Procedure 1, ensure that registers 3000 through 3007 of the HMA match the values
shown for LevelMaster 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.
18.2.
Physical Connections
18.2.1
Connect the XRC to a computer using USB-A to USB-B cable.
18.2.2
Connect an appropriate power supply to the battery terminal (J16) of the XRC.
18.2.3
Connect the HMA to a 9
–
30 VDC power supply via terminal block TB1.
18.2.4
Connect an RS-485 communications cable between the COM2 terminal block (upper
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 18.3.14.
18.2.5
Ensure that the appropriate communication module is inserted into the Comm 2
receptacle (XA2).
18.2.6
Connect a 120
resistor between the two RS-485 terminal block positions of the last HMA
on the bus.
Summary of Contents for Jupiter JM4
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