Serial Port Rts Setup - HP ESA-E Series Programmer's Manual

There can potentially be four I/O cards installed (1, 2, 3, or 4). Each
card may have up to two ports:
Card one uses port numbers 1 and 2
Card two uses port numbers 3 and 4
Card three uses port numbers 5 and 6
Card four uses port numbers 7 and 8
Factory Preset
(no *RST): The factory default is On. This parameter is persistent,
which means that it retains the setting previously
selected, even through a power cycle.
Front Panel
Access:
none

Serial Port RTS Setup

:SYSTem:COMMunicate:SERial[1]|2|3|4|5|6|7|8:CONTrol:RTS
OFF|ON|IBFull
:SYSTem:COMMunicate:SERial[1]|2|3|4|5|6|7|8:CONTrol:RTS?
Sets the hardware pacing (hand-shaking) scheme. Many high speed
asynchronous modems use this line (paired with CTS) as
receive/transmit pacing.
Off - indicates that the RTS line should always be asserted
On - indicates that the RTS line should always be unasserted
IBFull - selects the input buffer full mode for the RTS line. IBFull
sets the RTS line to indicate when the device is ready to receive.
When the number of received bytes in the input buffer of the device
reaches the stop threshold, the device will unassert the RTS line.
When the number of bytes has been reduced to the start threshold,
the device will assert RTS indicating that it can receive input again.
RTS is sometimes called RFR (ready for receiving). The device will
also monitor the state of CTS and will stop transmission if that line
becomes unasserted.
If no optional serial port number is specified, port 1 is assumed. There
can potentially be four I/O cards installed (1, 2, 3, or 4). Each card may
have up to two ports:
Card one uses port numbers 1 and 2
Card two uses port numbers 3 and 4
Card three uses port numbers 5 and 6
Card four uses port numbers 7 and 8
Chapter 5
Language Reference
SYSTem Subsystem
5-117