User`s manual

203
CHAPTER 7 DATA COMMUNICATIONS USING DC CODE TRANSMISSION CONTROL
7
CHAPTER 7 DATA COMMUNICATIONS USING DC
CODE TRANSMISSION CONTROL
The transmission control function controls (termination, restart) the transmission and reception of data between the Q
series C24 and external device by turning transmission control signals on and off, or by transmitting and receiving DC
codes (DC1, DC2, DC3, DC4), or informs the range of validity for the data to the external device.
The transmission control function can be set for each Q series C24 interface. The Q series C24 uses the transmission
control function set by the user to control data communications with external devices.
Set the transmission control function to match the specifications of the external device.
The table below lists the Q series C24 transmission control functions.
: Possible (transmission control used), : Invalid
*1 When using full-duplex communications with bidirectional protocol data communications, refer to the User's Manual
(Basic).
*2 Refer to the User's Manual (Basic) and check Q series C24 operation according to the RS (RTS) signal and CS (CTS)
signal control contents and CD terminal check designation.
When the Q series C24 is started, DTR/DSR signal control and RS/CS signal control are enabled.
Transmission control
function
Kind of control
Interface that can be
controlled
Protocol that can be controlled
Remarks
232 422/485 MC
Non
procedure
Bidirectional
DTR/DSR signal control
*1
DTR control


(Ignored)
 
Cannot be used simultaneously
with DC control.
One is selected.
DSR control  
RS/CS signal control
*2
   Normal control.
CD signal control
*2
   
The cable wiring depends on
whether or not control is used.
With half-duplex communications,
control is necessary.
DC code control
*1
DC1/DC3
transmission control

 
Cannot be used simultaneously
with DTR/DSR signal control.
One is selected.
DC1/DC3 reception
control
 
DC2/DC4
transmission control
 
DC2/DC4 reception
control
 