Printronix SL5000r User Manual page 250

Chapter 3
SERIAL PORT
Trickle Time
When the printer is printing data from a host and a second job is received by
the printer from a different host, Trickle Time prevents the second host from
timing out while it is waiting for its data to be printed. In order to support this
feature, the port has to be able to accept data from the host and store it for
future use.
For example, if the printer is printing a job from the serial port and then
receives a second print job from the parallel port, the data from the parallel
port will "trickle" bit by bit into the printer buffer to prevent a timeout error from
being sent back to the host connected to the parallel port.
The selected value is the time that the printer waits before getting the next
byte of data from the host. The Trickle Time value should be less than the
host time out value, but not too much shorter or else the printer fills up its
buffer too fast. This function is not applicable for C/T hotport.
The options are 1/4, 1/2, 1, 2, 4, 8, and 16 seconds and Off.
The factory default is 1/4 sec.
Timeout
This is the value used by the printer to time out from the current port and
check the other selected Port Types for data to print. When the printer has not
received data from the host after a certain period of time, it needs to time out
in order to service the other ports.
The range is from 1 to 60 seconds, and the factory default is 10 seconds.
Report Status
When a fault condition occurs in the printer, normally only the active port
reports the fault to the host. With this menu item enabled, the port will report
any fault even when it is not the current, active port.
The options are Disable (the factory default) and Enable.
Data Term Ready
Stands for Data Terminal Ready. This configuration is part of hardware flow
control and determines when the Data Terminal Ready (DTR) signal is
generated. This signal indicates if the printer is ready to receive data.
•
True (the default). Continuously asserts the DTR signal.
•
On-Line and BNF (buffer not full). Asserts the DTR signal when the
printer is online and the internal serial buffer is not full.
•
Off-Line or BF (buffer full). Asserts the DTR signal when the printer is
offline or the internal serial buffer is full.
•
On-Line. Asserts the DTR signal when the printer is online.
•
False. Never asserts the DTR signal.
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