Setting COM Port
The MicroLink-HM so ware must be set to use the same COM
port that the modem is connected to. From the top menu
select
Setup>Com Port
. Choose the COM port number from the
list of available ports. A er choosing, click
Connect
to a empt
to connect using the se ngs selected. The connec on process
will
fi
rst try the last good baud rate and parity se ngs. If it
fails to connect the process will work through other se ngs
to try to
fi
nd the
correct MicroLink-
HM se ngs for
communica ons.
If it s ll does not
connect - verify
that you have
chosen the correct
COM number,
connec ons are
correct, and power
is on before trying
again.
MicroLink-HM HART - Modbus Accumulator
In addi on to being an RS-232 HART Protocol Modem, the MicroLink HM can be set to collect and store process
variable informa on from up to 16 HART devices. HART devices are con nuously polled and variable informa on is
accumulated into a table of Modbus registers. Using the MicroLink-HM serial port, the registers can be read using
Modbus RTU command 3. Variable data can be read as 16 bit integers or 32 bit
fl
oa ng point. Up to 4 variables for each
polled HART device.
In the accumulate mode, MicroLink-HM will func on as a HART master (primary or secondary) polling devices and
storing variable values into registers. No addi onal HART so ware is needed. The HART loop may contain a single
device or up to 16 devices. When more than one device is in the loop each HART device must have a unique HART
polling address. The address for each device is set before wiring the device into the mul -drop loop. The device polling
address for each device is stored in the MicroLink-HM using the MicroLink-HM con
fi
gura on so ware.
Modbus slave address, baud rate, parity, and other se ngs are set using the MicroLink-HM con
fi
gura on so ware.
Con
fi
gura on is done using the same RS-232 port that Modbus will use so no addi onal setup cable is required. A er
the con
fi
gura on is completed, the RS-232 port is connected to the Modbus controller. At power on the MicroLink-HM
will begin polling and accumula ng values. Modbus RTU command 3 is used to read the accumulated values.
MicroLink HM Installation - Windows
The MicroLink-HM con
fi
gura on so ware is included on a CD with the unit. Simply insert the CD and follow the on-
screen prompts to install the so ware. If AutoRun is not con
fi
gured to run the CD
fi
le when the CD is inserted you will
need to navigate to the SetupHM.exe
fi
le on the CD and double-click the
fi
le name to run it.
A er Installa on the MicroLink-HM icon will be added to your system.
Don’t have a CD drive?
Download the HART Protocol CD image from
www.micro
fl
x.com/pages/support
Home Screen
The home screen displays a summary of the MicroLink-HM status, HART modem se ngs, and Modbus se ngs. Use the
top drop-down menus to con
fi
gure the MicroLink-HM modem.
Figure 3. COM Port List.
Figure 4. MicroLink-HM Setup home screen.
All manuals and user guides at all-guides.com
