Rockwell Automation Publication 1444-UM001D-EN-P - June 2018 119
Configure the 1444 Dynamic Measurement Module Chapter 3
The Time Slot Multiplier Page is accessible when the Module Personality is set
to the multiplexed measurement selections:
• Multiplexed, 4 Ch – Dynamic (40 kHz) or Static – Paired
When using the Multiplexed Personality to monitor, the Time Slot Multipliers
are used when it is necessary for some channels to update more frequently than
other channels.
When using the Multiplexed Personality, the module does not continuously
measure each channel. Rather, measurements are made on one channel pair at a
time. Once it completes each measurement, it moves to the channel pair that is
“next” on the schedule as determined by the Time Slot Multiplier values.
If all channels have the same multiplier value, then the measurements cycle one
to the next and back to the first. But if any of the multipliers are greater than
the others, then that channel or channel pair is sampled more frequently, by the
ratio of the multipliers, than the channels with lower multiplier values.
Tab le 20
provides examples of how the channels update with various multiplier
values specified.
IMPORTANT • Module Personality is specified on the Module Definition >Define
Module Functionality page.
• The Time Slot Multipliers are applied per channel pair (channels 0 and 1
and channels 2 and 3).
IMPORTANT Determining how long it takes to cycle through the channels in a
multiplexed application can be estimated by considering the measurement
definition for each channel or channel pair. In general, the time it takes to
measure a channel is equal to the period of the specified time waveform.
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