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2-7
IM AQ6370C-17EN
GP-IB Interface (GP-IB1 Port)
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App
Index
2.5 Responses to Interface Messages
Responses to Interface Messages
Responses to Uniline Messages
IFC (Interface Clear)
Clears talker and listener. Output is cancelled if outputting data.
REN (Remote Enable)
Switches between Local and Remote.
IDY (Identify) is not supported.
Responses to Multiline Messages (Address Commands)
GTL (Go To Local)
Switches to Local mode.
SDC (Selected Device Clear)
• Clears program messages (commands) being received, and the output queue.
• The *OPC and *OPC? commands are invalid during execution.
• The *WAI command closes immediately.
PPC (parallel poll configure), GET (group execute trigger), and TCT (take control) are not
supported.
Responses to Multiline Messages (Universal Commands)
LLO (Local Lockout)
Disables the front panel SHIFT+CLEAR operation, and prohibits switching to Local
mode.
DCL (Device Clear)
Same operation as SDC.
SPE (Serial Poll Enable)
Places the talker function of all devices on the bus in Serial poll mode. The controller
polls each device in order.
SPD (Serial Poll Disable)
Cancels Serial poll mode for the talker function of all devices on the bus.
PPU (Parallel Poll Unconfigure) is not supported.
Definition of Interface Messages
Interface messages
are also called
interface commands
or
bus commands
, and are
commands that are issued from the controller. Interface messages come in the following
categories.
Uniline Messages
A message is sent through a single command line. The following are the three types of
uniline messages.
IFC (Interface Clear)
REN (Remote Enable)
IDY (Identify)