Campbell Hausfeld COM220 Manual Do Utilizador

 

Changing any of the modem's settings may result in 
communication problems.  After changing the settings, try 
the modem locally before installing it at a remote location.  
To speed problem resolution when contacting Campbell 
Scientific for support, please inform us of any modem 
setting changes that have been made. 

The following COM220 settings are changed by opening or closing DIP 
switches: 

1) Communication mode, either Synchronous Device Communication (SDC) 

or Modem Enable (ME) 

2) ME baud-rate 
3) PakBus ready.   

To change DIP switch settings, the outer cover must first be removed by 
unscrewing and removing the five Philips head screws on the cover. 

It is necessary to cycle power to the COM220 for changes 
to the DIP switch settings to take effect.  This is done by 
removing the 9 pin connector for about 5 seconds.  As with 
other devices, if you leave the power off for too short a 
time, you may get unexpected results. 

The COM220 supports Synchronous Device Communication (SDC) and 
Modem Enable (ME) communication.  Switch 1 selects between SDC and ME.  
If switch 1 is open, ME mode is selected.  If switch 1 is closed and switch 2 is 
open (default), SDC7 is selected.  If both switch 1 and 2 are closed, SDC8 is 
selected.  SDC is not supported by non-Pakbus operating systems (e.g., 
CR10X, CR23X, CR7, CR510).  Hence, to connect with these older 
dataloggers, switch 1 must be open (i.e., Modem Enable mode selected).  

DIP switches 3 and 4 only have effect when the COM220 is in Modem Enable 
mode.  If the COM220 is in ME mode, switches 3 and 4 select the baud-rate 
setting between the COM220 and the datalogger as follows: