Raco Verbatim, Руководство пользователя

Страница: 122 / 246

Data Acquisition/Central Data Logging
E-4 Verbatim Owner's Manual
E.4 Modem Automatic Speed Select for
SCADA units
Automatic speed selection of 1200 baud or 300 baud may be programmed ON
or OFF. When programmed ON, the unit will attempt to make data calls at
1200 baud first. If 1200 baud cannot be automatically negotiated with the
SCADA Central Computer's modem, fallback to 300 baud will occur. When
programmed OFF, the modem speed will be determined by the 984 command
(below).
v
Exception
In some cases, 1200 baud may not provide reliable data communications due to
phone line noise, etc. If necessary, use this command to force the unit's modem
to use one specific speed only.
u
To program the Automatic Speed Selection, press:
983 N
Where N is 1 (ON) or 0 (OFF)
Default is 1
!
Note:
This command is not applicable to Central Data Logger units.
E.5 Modem High Speed or Low Speed
Selection
When the unit is programmed with Automatic Speed Select OFF use this
command to fix the modem speed at either 1200 or 300 baud.
u
To program the (non-Automatically selected) Modem Speed, press:
984 N
Where N is 1 (1200) or 0 (300)
!
Note:
When Automatic Speed Select is set to ON (command 983) this command has
no effect on modem speed.