B&B Electronics 232DRIO Manuel D’Utilisation

10 232DRIO-0308 

Manual 

 

 

 

 

 

Set Output Lines 

!0S{…} 

No response 

Read I/O Lines 

!0R 

{…} 

Set Output Lines 

#0S{…}{~…} 

No response 

Read I/O Lines 

#0R 

{…}{~…} 

 

 

 

Symbol:  {…} 

represents one byte 

      <…> 

represents 

a 

numeric 

value 

      ~ 

 complement 

of 

the 

specified 

data 

byte 

 

 

 

 

Before going into the specifics of each command, it is important 

to understand that a byte has a numeric value from 0 to 255.  The 
byte's value can be represented in decimal (0 -255) format, 
hexadecimal (00 - FF) format, binary (00000000 - 11111111) format 
or as an ASCII character.  The fixed bytes of  each command will be 
represented as ASCII characters,  for example: “!0R”.  Refer to 
Table 3.1.  However, it is important to remember that an ASCII 
character has a numeric value.   Example: the ASCII “0” (zero) does 
not have a value of zero but has a value of 48.  The decimal and 
hexadecimal equivalents of some ASCII characters are shown in 
Table 3.2.  Some commands require an additional data byte to 
complete the command.  These data bytes may be represented in 
any of the formats listed above.  Refer to Appendix A for more ASCII 
and decimal equivalents. 
 

 

! 33 

21h 

# 35 

23h 

0 48 

30h 

R 82 

52h 

S 83 

53h 

 

 

Command strings consists of three to five bytes depending on 

commands used for normal or harsh environments.  The first byte is 
always the start of message byte. The start of message byte is 
either the ASCII “!” character (normal) or the ASCII “#” character 
(harsh).  The second byte is the address byte.  This byte allows 
each unit to have a unique address (useful in RS-485 networks).  
Since the 232DRIO uses RS-232 communications, this byte is 
always the ASCII “0” character and can not be changed.  The next 
byte is the command character. This byte is ASCII character and