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Maintenance Serial POft Flow Control (XON / XOFF)
FFl
Maintenance
Serial Port Flow Control
(XON / XOFF)
Software Version:
CPC-S
and CPC-M, Version 1.0 and higher
Address:
FFl 2# 9# 6## (0 or l)#
Description
Use this address to determine whether the DBS 824 system will control the
flow of data between it and the device connected to the Maintenance serial
port (CN2).
"XON/XOFF'
(if activated in this address) is a software switch that will
temporarily stop the flow of data when the device's memory buffer receives
more data than it can process, and resume the flow when the buffer empties.
"XON/XOFF'
should be deactivated (default setting) if a flow control
mechanism is present elsewhere in the interface (i.e., in the printer, or RTS
and CTS lines). A flow control mechanism should always be present in order
to prevent data from being lost during transmission.
Notes
FFl 2# 9## 6# (0 cy I)#
O=Turns off "XON/OFF' (824 software
does not control data flow).
l=Turns on "XON/XOFF'
(824 software
controls data flow).
DBS Bu.r
Size. The size of the DBS 824 buffer for maintenance data is
1,000 bytes. This is the maximum amount of data that the system can hold
while the device is emptying its buffer.
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