Owner`s manual

15
 
Mode of Operation 3 provides multiplexing to the host port of a single
message from all peripheral ports. Single messages from each
peripheral port are sent to the host device only when a command is
received requesting them. When the host device sends a request for
message command, the Model 24H will send a complete message
from each peripheral port to the host port preceded by a port
identification number corresponding to the port from which the
message came. Complete messages are sent to the host port in a
round-robin fashion.
  
Mode of Operation 4 provides multiplexing to the host port of all
messages from a selected peripheral port. You select a particular
peripheral port and all complete messages in the buffer for that port are
transmitted to the host device automatically with each message
preceded by a port identification number.
  
Mode of Operation 5 provides multiplexing to the host port of a single
message from a selected port. You select a specific peripheral port
and a single message from that peripheral port is sent to the host
device when the host device requests it. Each message is preceded by
a port identification number.
  
Mode of Operation 6 provides time-division multiplexing. In this mode,
the Model 24H continuously scans all ports to check for characters in
the receive buffers. If a receive buffer contains data, the data is
transmitted to the host device preceded by a port identification code
corresponding to the peripheral port number from which the data block
came. Transmission continues until the buffer is empty or until a
user-specified data block length has been transmitted.