Campbell Scientific PC208 Datalogger Support Software - Manual (Page 82)

SECTION 5. TELCOM
5-8
number sets the time that the Hayes waits for
the carrier to 60 seconds. The phone number
and Hayes commands cannot exceed 40
characters.
NOTE: High speed and fax modems have
a larger command set and are more
complex than the old 1200 baud modems.
Appendix A.3 describes the use of
initialization files to configure these
modems.
When the RF Modem is selected, TELCOM will
ask for an RF Modem path. The path is one or
more RF Modem ID numbers. If repeaters are
used to get between the first RF Modem and
the last, then more than one ID must be
entered. All the repeater numbers are entered
on the same line. For example, if you are going
through one repeater to the datalogger, and the
repeater ID number is "123" and the ID number
on the datalogger is "234", then enter the
number '123 234'. The path cannot exceed 40
characters.
The MD9 Multidrop Interface requires an
address. The address is a number from 0 to
255. This address must match the address in
the MD9.
The letter F can be added to the end of the path
to speed communication between the RF
modem and the datalogger (e.g., 123 234F). If
the end link is between a RF Modem and
datalogger, adding the F sets the end link baud
rate to 9600. Without the F, the baud rate is set
to that used at the start of link (computer or
phone to RF) with a maximum of 1200 baud.
The F should not be used when using TERM to
download or upload a datalogger program.
Campbell Scientific Modems now use RF which
default to a higher speed RF transmission than
used previously. If older (prior to February,
1989) DC95 Modems are being used, please
consult the RF Manual for compatibility
considerations.
Because the SC95 Short Haul Modem (RAD
SRM-6A) is not switched, there is no number or
path necessary with this device.
5.2 STATION OPTIONS
Once a station file has been created for a
station, it can be called by running TELCOM
and simply entering the station name. There
are several options that may be selected when
entering the station name. The options are
specified by following the name with '/' and one
or more of the letters designating the option.
The '/E' (Edit parameters) option allows the
user to edit the parameters in an existing station
or script file.
The '/C' (Call now) option forces TELCOM to
call the specified station NOW whether or not it
is time to call.
The '/W' (Wait for wake up time) option is
typically used at the end of a script file (Section
5.3) to force TELCOM to wait for the next time
to call, at which time TELCOM will go through
the script file again. The /A option allows
TELCOM to "wake up" from waiting and answer
an incoming call. While waiting, TELCOM will
exit to the system if the switch on the PC203 is
turned on or if escape key (ESC) or the control
and C keys (^C) are pressed on the keyboard.
The '/A port' (Answer modem ring) option must
be used if TELCOM is to answer incoming calls.
It is entered as the first line in a script file to
force TELCOM to look for a ring signal on the
port (COM1, COM2, COM3, or COM4) that is
connected to the modem followed by the
highest expected baud rate. (e.g., '/A
COM1:9600' or '/A COM3:1200').
The ‘L loc’ (Collect from Location) option is an
advanced option that is rarely used. This
changes the address of the datalogger pointer
used for data collection from Final Storage.
Typically this pointer should not be changed.
The effect of changing the datalogger pointer
depends on whether the data collection method
is specified as since Last Call or Most Recent
Arrays. If specified as Since Last Call,
TELCOM uses this address to determine where
data collection is started. If specified as Most
Recent Arrays, the option has no effect.
CAUTION: Changing the address of the
pointer can result in duplicate or skipped
data.