Magnetrol Jupiter JM4, Руководство по эксплуатации

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41-621.1 HART ® to Modbus ® Adaptor Operating Manual
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connected to the same RS-485 line. There can be a maximum of 5 devices connected to an
HMA including the device in the housing containing the HMA.
9.3.2
Multiple HMAs
Install jumper wires connecting the positive terminal of the RS-485 terminal block of HMA1
and the positive terminal of the RS-485 terminal block of HMA2 as well as the negative
terminal of the two terminal blocks. Continue for the number of HMAs to be used on the
line. Connect a 120

resistor between the two RS-485 terminal block positions of the last
device on the RS485 line.
9.4.
Procedure
9.4.1
Connect HMA1 to a power supply, Modbus host and MII HART transmitters as specified in
section 9.3.1.
9.4.2
Using Procedure 1, ensure that registers 3000 through 3007 of the HMA match the values
for the Modbus RTU protocol settings used by the intended Modbus master. 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 to open the Write Single Register dialog, enter
the new value, and then click on Send.
9.4.3
Using Procedure 2, change register 3001 to a value of 15. This changes the address of the
HMA to 15 to be unique from the other HMA and from the attached devices. Note that
the choice of address for the HMA is not critical as long as it is different from other HMAs
to be used in the same system.
9.4.4
Using Procedure 2, change register 3007 to a value of 1. This sets the HMA to run in the
Device mode which allows direct Modbus addressing of the HART devices. In this mode,
the Modbus address will be the same as the HART Poll Address for each attached device.
9.4.5
Using Procedure 2, change register 3012 to a value of 0. This will cause the HMA to scan
the attached devices at start-up, and record the poll address and other information for
each device.
9.4.6
Change DIP switch 1 to ON.
9.4.7
Change the slave ID for the Read/Write Definition from 247 to 15 (or the Modbus address
selected for the HMA).
9.4.8
Using Procedure 2, verify that register 3012 of the HMA has automatically changed to a
value of 1.
9.4.9
Using Procedure 2, verify that parameters of the HART devices can be read through the
appropriate registers. The supported parameters of the Magnetrol HART transmitters are
listed in Appendices L through S. Use the Modbus Register number column labeled
‘Device Mode’ for the Address number. Note that the Slave ID number must match the
HART Poll Address of the attached device. Multiple registers may be read at the same
time as long as the register numbers are contiguous and can be shown as the same data
type. For example, the PV, SV, TV and QV values for a HART device set to Poll Address 2
can be displayed in one Modbus Poll window by setting the Read/Write Definition to: