Agilent Technologies Agilent 3499A, User Manual, Page: 155 / 357

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Chapter 5 Remote Interface Reference
System Information Commands
4
5
DIAGnostic
[:RELay]:CYCLes? <channel_list>
[:RELay]:CYCLes:MAX? <slot>
[:RELay]:CYCLes:CLEar <channel_list>
The switching plug-in modules count the number of cycles on each relay
on the module and store this total count in non-volatile memory on each
switch module. Use this feature to track relay failures and predict
system maintenance requirements.
This feature is supported by the Agilent N2260A, N2261A, N2262A,
N2264A, N2265A, N2266A, N2267A, N2268A, N2270A, N2272A,
N2276A, and N2280A/81A/82A modules.
The channel_list parameter has the form @snn, where s is the slot
number and nn is the channel number. The actual channel numbers are
module dependent. Channel number for plug-in modules are listed on
page 70. The parameter can contain one or more channels as follows:
•
a single channel, use (@snn);
•
multiple channels, use (@snn,snn...);
•
sequential channels, use (@snn:snn);
•
groups of sequential channels, use (@snn:snn,snn:snn);
•
or any combination of the above.
The channel_list parameter may also contain the tree switching relays
(
numbered as s98 and s99) for the N2260A and N2266A modules.
The
DIAGnostic:RELay:CYCLes?
query returns the number of cycles
for the specified channel or channels. For modules or channels that
cannot respond to the query, -1 is returned. For multiple channels, the
returned value is a series of comma-separated integers in the same order
as the channel_list.
The
DIAGnostic:RELay:CYCLes:MAX?
query returns the maximum
relay cycle count for a module in the specified slot. The returned integer
value is the maximum relay cycle count among all the relays on the
specified module. The returned value does not indicate the channel
number with the maximum count.
The
DIAGnostic[:RELay]:CYCLes:CLEar
command resets the relay
cycle counter of the specified channel(s). This command resets the relay
cycle count back to zero. Use this command when replacing a relay with
a new one.