R&S ESU Remote Control – Basics
Messages
5.8 Operating Manual 1302.6163.12 - 03
5.4.4.2 Return to Manual Operation
Return to manual operation can be made manually via the front panel or remotely
via the RSIB interface.
Manually:
Press LOCAL softkey or PRESET key.
Via RSIB interface:
CALL RSDLLibloc(analyzer%, ibsta%, iberr%, ibcntl&)
'Set device to manual operation
5.5 Messages
The messages transferred via the data lines of the GPIB (see chapter “Maintenance
and Instrument Interfaces”, section “GPIB Interface” on page 8.2) can be divided
into two groups:
– “GPIB Interface Messages”
– “Device Messages (Commands and Device Responses)”
5.5.1 GPIB Interface Messages
Interface messages are transferred on the data lines of the GPIB, the "ATN" control
line being active. They are used for communication between controller and instru-
ment and can only be sent by a controller which has the remote control. Interface
commands can be subdivided into
– universal commands and
– addressed commands.
Universal commands act on all devices connected to the GPIB without previous
addressing, addressed commands only act on devices previously addressed as lis-
teners. The interface messages relevant to the instrument are listed in chapter
“Maintenance and Instrument Interfaces”, section “Interface Functions” on page 8.4.
5.5.2 Device Messages (Commands and Device Responses)
Device messages are transferred on the data lines of the GPIB, the "ATN" control
line not being active. ASCII code is used.
A distinction is made according to the direction in which they are sent on the GPIB:
– Commands are messages the controller sends to the instrument. They operate
the device functions and request informations.
The commands are subdivided according to two criteria:
Make sure that the execution of commands is completed prior to switch over since
otherwise the instrument will switch back to remote control immediately.
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