Scan Rate; Table 4-70 Suggested Scan Rates - Honeywell VRX180 User Manual

Programming Function Blocks and Features

4.24 Scan Rate

Scan rate is the time required to measure inputs, execute function blocks (AI, Loops, AO, DI, DO, CV,
etc.) and update outputs. It is also known as the machine cycle, scan cycle, and update rate.
The Scan Rate prompt lets you set the scan rate of the instrument to a value slower than the maximum
rate allowed by the hardware. The hardware will determine the default scan rate. Allowable entries are
250 milliseconds, 500 milliseconds, 1 second, 2 or 3 seconds. 250 ms rate is only available on 4 input
units.
We recommend the following scan rates for the following configurations.
Inputs
Up to 4
Up to 12
Up to 16
Up to 24
Up to 32
Up to 44
Up to 48
NOTE
These are suggested scan rates. In general, if your instrument responds too slowly, use a slower (higher)
scan rate. You can use a faster (lower) scan rate than suggested here, but be aware of possible sluggish
display and button response time.
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Table 4-70 Suggested Scan Rates

Scan Rate
250 msec
500 msec
750 msec
1 sec
1.5 sec
2.0 sec
3.0 sec
Video Recorder – User Manual
W/Control
500 msec
1 sec
1 sec
1.5 sec
2 sec
2 sec
3 sec