Owner manual

<Appendix G Troubleshooting for USB Modem>
App.-45
IM 01R01A01-01E 9th Edition : May 31, 2013-00
AppendixG TroubleshootingforUSB
Modem
Pleaseconrmthefollowingpointsrstifthemodemdoesnotseemtofunctionproperly.
If the problem (s) persists, please contact our service representative in your region.
(Note): Figures in brackets () indicate document number.
Table App.-G-1
# Problem Symptoms and Counter measures
1 USBModemcannotbe
recognized.CheckDevice
Manager on your PC. If not found,
see solution (s) at right.
- Relating to install procedure
DriversoftwareforUSBModemisnotinstalledproperly.
- IfinDeviceManager“CP210xUSBtoUARTBridgeController,”is
indicated as an unknown device, disconnect the modem from the
USBportandDouble-clickthefollowingle.
FieldMateCD-ROM\USB_Modem_Drive\Common\
CP210xVCPInstaller.exe.
Ditto
- Relating to your PC environment
An “unknown device” may have hampered the driver software for the
USBModem.
- Delete the “unknown device” in Device Manager, disconnect the
modemfromtheUSBportandthenconnectthemodemagain.
Ditto
- Relating to your PC environment
COM Port is being occupied by other devices.
- Disconnect the other devices using COM port, disconnect the modem
and then connect it again.
Ditto
- Relating to current operation
COM Port is being occupied by another communication application.
- Terminateanothercommunicationapplicationrst,Disconnectthe
modemfromtheUSBport,waitformorethan30seconds,connect
the modem again.
If the problem persists, restart the PC and check whether the modem
canberecognized.
Ditto
- Relating to current operation
COM Port is being occupied by FieldMate (i.e., in cases where the
modem has been disconnected then reconnected unexpectedly)
- DisconnectthemodemfromtheUSBport,waitformorethan30
seconds, then connect the modem again. If the problem persists,
restartthePCandcheckwhetherthemodemcanberecognized.
2 Communicationwithelddevice
cannot be established.
PCdoesnotrecognizethemodem,ordriversoftwarecannotbe
installed properly.
→RefertoProblem#1.
Ditto USBModemisnotconnectedtothePC.
→ ConrmthatthemodemisconnectedtotheUSBportofthePC.
Ditto USBModemisnotconnectedtothe4-20mAlinewithcommunication.
→ ConrmthatthecurrentsetupfollowsthedescriptioninPartC-3of
this document.
Ditto Field device is not connected.
→ ConrmthatthecurrentsetupfollowsthedescriptioninPartC-3of
this document.
Ditto PowerlinefortheelddeviceisOFF.
→ Conrmthatthecurrentsetupfollowsthedescriptionandpower-on
procedure in Part C-3 of this document.
Alsoconrmthattherequiredpowerissuppliedtothefourwired
device.
- Onaelddevicewithanexternalindicator,checkthatpoweris
supplied.
- Onaelddevicewithnoexternalindicator,checkthevoltageonboth
sides of the load register according to Part C-3 of this document.
Ditto Load resistor’s resistance is too low.
- More than 250 OHM is required for stable communication. Check the
load resistor currently being used, change or replace it accordingly.
3 WhenconnectingtheUSB
Modem, the PC hangs up or
reboots.
ModemconsumescurrentinexcessofthatwhichtheUSBcan
accommodate.
- UsingaUSBhub,disconnecttheotherUSBdevices.Iftheproblem
persists, contact our service representative in your region.