
60 
TROUBLESHOOTING  
Symptom  Possible Cause(s)  Solution 
RS232 Only 
The com port at the host is 
not working or is not 
configured properly. 
The cable is not connected to 
the proper com port. 
The unit powers up OK 
and scans OK but does 
not communicate properly 
to the host. 
The com port is not operating 
properly. 
Check to make sure that the baud rate and parity of the 
scanner and the communication port match and the program 
is looking for RS232 data. 
The host is receiving data 
but the data does not look 
correct. 
The scanner and host may 
not be configured for the 
same interface. 
Check that the scanner and the host are configured for the 
same interface. 
Characters are being 
dropped. 
The intercharacter delay 
needs to be added to the 
transmitted output. 
Add some intercharacter delay to the transmitted output by 
using the MetroSelect Configuration Guide (MLPN 00-
02407x). 
Aux Port Operation With Any Interface 
The secondary scanner is 
not functioning.    Refer to the user’s guide provided with the secondary 
scanner. 
The secondary scanner cable 
may not be connected to the 
proper port on the StratosS. 
Ensure that the secondary scanner is connected to the 
MS2220 com port marked “Aux” port. 
*  The MS2220 series must be configured to enable the 
auxiliary port. 
The secondary scanner 
powers up but data is not 
relayed to the host. 
The auxiliary com port may 
not be operating properly. 
The auxiliary input port’s data format must match the main 
output format of the secondary scanner. 
* Refer to the MS2xxx Stratos Series Configuration Addendum (MLPN 00-02034x) under Scanner Configuration Bar 
Codes: Auxiliary Port, Quick Start for a Secondary Scanner.