Campbell PC208W, Instruction Manual

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Appendix B. Modems
PC208W, Version 3.3, Instruction Manual B-3
B.3 MD9 Multidrop Interface
PC208W uses MD9 dialing with the base MD9 ID (address) set to 255. Note
that phone to MD9 networks already have the base MD9 address set to 255 and
do not need to be changed. Addressing the base MD9 at 255 provides
PC208W with a prompt from the base MD9. This provides more reliable
dialing and better information about any problems that may occur while
dialing.
NOTES ON USING PC208 AND PC208W
Both PC208W and PC208 can be used to communicate with the same
datalogger. Data collection will be independent. If an MD9 network is used,
any station file used with PC208E, GraphTerm or TELCOM will need to be
changed once the base MD9 address is changed. To modify the .STN file for
current DOS versions of PC208, simply add a “ #” to the end of the MD9
dialing path.
For example, the device section of a station with an MD9 addressed at 1 would
change from:
Interface Device:
#1: MD9 Addr: 1
to:
Interface Device:
#1: MD9 Addr: 1 #
B.4 Short Haul Modems
Newer short haul modems (SRM5) are configured as if the datalogger were
operating under a direct connection. The datalogger is added directly to the
COM port in the device map, with no other devices between the two.
Older short haul modems (SC95) require a different setup. A generic modem
should be added to the COM port, with the datalogger attached to the generic
modem. The generic modem should have half-duplex enabled (selected on the
Setup screen's Hardware tab), with all other settings at the default. The
Generic Modem's dialing string field should be left empty.
If the SC95 modem setup still does not work, ensure that the
modem is set up to be rung by the calling device and not
manually. Refer to the SC95 users manual for more information.
B.5 NL100/105 (Network Link Interface)
Campbell Scientific's NL100/105 is used to communicate with a datalogger
over an Ethernet network using TCP/IP communication. PC208W's setup
screen has an Add Socket button which is used to specify the TCP/IP address
and port number of the NL100/105 device. The NL100/105 can be connected
to a computer on a network or to a hub or router on a network. PC208W's
NOTE