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Operating and Programming 3
L4400 User’s Guide 79
Reading Format
Usage:
• L4450A 64- Bit Digital I/O (digital input, counter channels only)
• L4452A Multifunction Module (digital input, totalizer channels only)
During a scan, the instrument automatically adds a time stamp to all
readings and stores them in memory. Each reading is stored with
measurement units, time stamp, channel number, and alarm status
information. You can specify which information you want returned with the
readings.
• The reading format applies to all readings being removed from the
instrument from a scan; you cannot set the format on a per- channel basis.
• The CONFigure and MEASure? commands automatically turn off the units,
time, channel, and alarm information.
• The format settings are stored in volatile memory and will be lost when
power is turned off or after a Factory Reset (
*RST command).
The following commands to select the reading format.
FORMat:READing:ALARm ON
FORMat:READing:CHANnel ON
FORMat:READing:TIME ON
FORMat:READing:TIME:TYPE {ABSolute|RELative}
FORMat:READing:UNIT ON
Non-Sequential Scanning
Usage:
• L4421A 40- Channel Armature Multiplexer
• L4450A 64- Bit Digital I/O (digital input, counter channels only)
• L4452A Multifunction Module (digital input, totalizer channels only)
By default, channels are scanned in ascending order. If your application
requires non- ordered scanning of the channels in the present scan list, you
can use the non- sequential scanning mode.
• When sequential scanning is enabled (default), the channels in the scan
list are placed in ascending order.
• When sequential scanning is disabled (OFF), the channels remain in the
order presented in the scan list. Multiple occurrences of the same channel
are allowed. For example, (@1001, 1001, 1001) and
(@1010,1003,1001,1005) are valid and the channels will be scanned in the
order presented.