41-621.1 HART
®
to Modbus
®
Adaptor Operating Manual
55
16.
Emerson ROC 800
16.1.
Initial HMA Configuration
16.1.1
Using Procedure 1, ensure that registers 3000 through 3007 of the HMA match the values
desired for communication with the ROC 800. Refer to Appendix F for the HMA RTU
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.
16.2.
Physical Connections
16.2.1
Connect the ROC 800 to a computer using an LOI RS-232 cable.
16.2.2
Connect an appropriate power supply to the power supply module of the ROC 800.
16.2.3
Connect the HMA to a 9
–
30 VDC power supply via terminal block TB1.
16.2.4
Connect an RS-485 communications cable between terminals A and B of the ROC 800 RS-
485 module and the RS-485 terminal block (TB2) of the HMA.
16.2.5
Connect a 120
resistor between the two RS-485 terminal block positions of the last HMA
on the bus
16.3.
Initial ROC 800 Configuration
16.3.1
Start the ROCLINK 800 application.
16.3.2
Select ROC \ Direct Connect in the ROCLINK 800 Menu bar. An image of the front of the
ROC 800 will appear.
16.3.3
Mouse over the image of the RS-485 module. A flyover text box will appear that
identified the Comm Port used for RS-485 communication with the HMA.
Summary of Contents for Jupiter JM4
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