Rosemount Information Bulletin: XA Series GC and MON2020 Installing and Connecting to an Analog Modem Card Manuals & Guides
Information Bulletin
May 24, 2011 MON 20/20, XA Series Gas Chromatographs
Installing and connecting to an analog modem card
The XA series gas chromatographs have
two slots—I/O Slot A and I/O Slot B—
available in the card cage in the electronics
enclosure for installing an analog modem.
MON 20/20 only recognizes Microsoft
Windows-compatible modems that have
all relevant drivers installed correctly.
Analog modems will only work with PSTN
phone lines. Analog modems will not work
with VOIP networks.
The following four LEDs are provided on the
modem for troubleshooting:
• RI (Ring Indicator) - This LED flashes
when it senses a "ring". This LED
should only flash once per connection
because the modem automatically
answers on the first ring.
• CD (Carrier Detect) - This LED glows
green while connected to MON 20/20.
• RX (Receive) - This LED flashes while
the GC receives data from MON 20/20.
• TX (Transmit) - This LED flashes while
the GC sends data to MON 20/20.
Installing the analog modem
To install an analog modem, do the
following:
1. Start MON 20/20 and connect to the GC.
4. Click Save. MON 20/20 displays the
following message:
The GC must be rebooted for
the ROC Card changes to take
effect
5. Click OK to dismiss the message.
6. Click OK to close the I/O Cards window.
7. Disconnect from the GC.
8. Turn off the GC.
9. Insert the analog modem card into the
appropriate I/O slot in the GC’s card
cage. Make certain that the I/O slot
matches that from Step 3.
10.Tighten the card’s screws to secure the
modem in the slot.
2. Select I/O Cards... from the Tools
menu. The I/O Cards window displays.
3. Change the Card Type for the
appropriate I/O slot to Communication
Module - Modem.
Information Bulletin MON 20/20, XA Series Gas Chromatographs
11. Insert a telephone cable into the modem
card’s RJ-11 socket.
12.Start the GC.
13.Return to MON 20/20 and connect to the
GC via its Ethernet connection.
Note: The fields in the Label column are
editable so it is possible to give your modem
card a more appropriate name, if necessary.
15.Set the Baud Rate for the analog modem
card to 57600.
16.Make note of the I/O slot’s Modbus Id.
17.Click Save.
18.Click OK to close the Communication
window.
19.Disconnect from the GC.
Connecting to the GC via the analog modem
To connect to a GC via its analog modem,
do the following:
1. Start MON 20/20 and select GC
Directory... from the File menu. The
GC Directory window displays.
14.Select Communication... from the
Application menu. The
Communications window displays. The
appropriate I/O slot should be listed in
the first column (Label).
2. Select Add from the GC Directory
window’s File menu. A row is added to
the bottom of the directory table.
3. Replace “GC Name” with a more
appropriate identifier for the GC to which
you will be connecting.
Note: You can also enter more
information about the GC in the Short
Desc field.
4. Select the Modem check box.
5. Click the Modem... button. The Modem
Connection Properties for DialUp
window displays.
2 Installing and connecting to an analog modem card
Information Bulletin MON 20/20, XA Series Gas Chromatographs
6. Make sure that the Comm Address
matches the Modbus Id from the
Communication window.
7. Select the appropriate modem from the
Modem drop-down list. The Edit
Telephone Number dialog box displays.
8. Enter the modem’s telephone number
and click OK. The Modem Properties
window displays.
9. Click OK to close the Modem Properties
window.
10.Click the GC Directory window’s Save
button.
11. Click the GC Directory window’s OK
button to close the window.
12.Select Connect... from the
Chromatograph menu. The Connect to
GC window displays.
13.Click the Modem button for the
appropriate GC. The Login dialog box
displays.
14.Enter the appropriate user name and
password and click OK. MON 20/20 will
connect to the GC via the modem
connection.
Installing and connecting to an analog modem card 3
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