User manual

Translation Formats
ProMaster 2500 User Manual D-3
Instrument Control Codes
The instrument control code is a 1-digit number that signals or controls
data transfers. Specifically, the instrument control code can be used to
implement a form of remote control that provides peripherals with flow
control beyond that provided by software handshaking. When using
computer remote control, the instrument control code is sent immediately
preceding the 2-digit format code. The three values of the instrument
control code and associated functions are described below.
Note: X-ON character is a CTRL-Q, or 11 hex.
X-OFF character is a CTRL-S, or 13 hex.
PUNCH-ON character is a CTRL-R, or 12 hex.
PUNCH-OFF character is a CTRL-T, or 14 hex.
0-Handshake Off
Input Function: Send X-OFF to stop the incoming transmission. Send
X-ON to resume transmission.
Output Function: Data transmission will be halted upon receipt of an
X-OFF character; transmission will resume upon
receipt of an X-ON character.
1-Handshake On
Input Function: Transmit an X-ON character when ready to receive
data; transmit X-OFF if the receiver buffer is full;
transmit an X-ON if the receiver buffer is empty;
transmit an X-OFF after all the data are received.
Output Function: Transmit a PUNCH-ON character prior to data
transmission. Data transmission will be halted upon
receipt of an X-OFF character and will resume upon
receipt of an X-ON character. A PUNCH-OFF
character is sent when the transmission is completed.
2-X-ON/X-OFF
Input Function: Send X-OFF to stop the incoming transmission. Send
X-ON to resume transmission.
Output Function: Transmit data only after receiving an X-ON
character. Data transmission will be halted upon
receipt of an X-OFF character; transmission will
resume upon receipt of an X-ON character.