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68 L4400 User’s Guide
3 Operating and Programming
• The simulation setting is stored in volatile memory and will be lost when
power is turned off. To re- enable the simulation mode after power has
been off, you must send the command again. The command used is:
SYSTem:ABUS:INTerlock:SIMulate {OFF|ON}
User-Defined Channel Labels
Usage:
• All L4400 series instruments
You can assign user-defined labels to any channel, including Analog Bus
channels on the L4421A and L4433A instruments. User-defined channel
labels are available for identification purposes only and cannot be used in
place of a channel number within a command string.
• When shipped from the factory, each channel is assigned a unique
factory- default label (cannot be overwritten). From the instruments’ Web
interfaces, the factory- default labels are displayed as the channel number
(e.g., “1001”, “1020”, etc.).
• If desired, you can assign the same user-defined label to multiple channels
within the same module or on different modules (i.e., channel labels are
not required to be unique).
• You can specify a label with up to 18 characters. You can use letters (A- Z),
numbers (0- 9), and the underscore character. If you specify a label with
more than the allowed 18 characters, it will be truncated (no error is
generated).
• From the Web Interface, a limited number of characters can be displayed
due to space constraints in the browser window. If the user- defined label
it too long to be displayed properly, it will be truncated (no error is
generated).
• All user-defined channel labels are stored in non- volatile memory,
and do not change when power has been off, after a Factory Reset (
*RST
command), after an Instrument Preset (SYSTem:PRESet command), or
after a stored state is recalled (*RCL command).
The following command assigns a label (“TEST_PT_1”) to channel 3 in slot 1.
ROUT:CHAN:LABEL "TEST_PT_1",(@1003)
The following command clears the user- defined label previously assigned to
channel 3 in slot 1. The channel will now be identified by its factory default
label (e.g., “MUX CH BANK 1”, “MATRIX1 ROW3 COL4”,
“DIO BYTE 1”, etc.).
ROUT:CHAN:LABEL "",(@1003)