OUTPut:ALARm<n>:SOURce
Syntax
OUTPut:ALARm<n>:SOURce (@<ch_list>)
OUTPut:ALARm<n>:SOURce?
Description
This command assigns one of four alarm numbers to report any alarm conditions on the specified multiplexer or digital channels.
On the digital modules, you can configure the instrument to generate an alarm when a specific bit pattern or bit pattern change is detected on a digital input channel or when a specific count is reached on a totalizer channel. These channels do not have to be part of the active scan list to generate an alarm.
Used With:
34921A through 34925A Multiplexer Modules
34950A Digital I/O Module (digital input and counter channels only)
34952A Multifunction Module (digital input and totalizer channels only)
Parameters
|
Name |
Type |
Range of Values |
Default Value |
|
<n> |
Discrete |
{1|2|3|4} |
This is a required parameter |
|
<ch_list> |
Numeric |
One or more channels in the form (@sccc). 34950A: Digital Input: s101 through s104, s201 through s204 Counter: s301 or s302 34952A: Digital Input: s001 through s004 Totalizer: s005 |
This is a required parameter |
Remarks
You can assign multiple channels to any of the four available alarms. For example, you can configure the instrument to generate an alarm on the Alarm 1 output when a limit is exceeded on any of channels 1003, 2005, or 3010. You cannot, however, assign alarms on a specific channel to more than one alarm number.
To clear all channel assignments for a specific alarm, send the command with an empty channel list as shown in the example below:
OUTP:ALAR1:SOUR (@)A Factory Reset (*RST command) clears all alarm limits and turns off all alarms. An Instrument Preset (SYSTem:PRESet command) or Card Reset (SYSTem:CPON command) does not clear the alarm limits and does not turn off alarms.
Return Format
The query command returns a series of channel numbers in Definite-Length Block format. The syntax is a pound sign (#) followed by a non-zero digit representing the number of digits in the decimal integer to follow. This digit is followed by a decimal integer indicating the number of 8-bit data bytes to follow. This is followed by a block of data containing the specified number of bytes.
For example:
|
|
An empty scan list (one with no channels selected) will return "#13(@)".
Examples
The following command assigns Alarm 2 to report any alarm conditions on channels 3 and 13 in slot 1.
OUTP:ALAR2:SOUR (@1003,1013)
The following query returns the channels assigned to Alarm 2.
OUTP:ALAR2:SOUR?
Typical Response: #212(@1003,1013)