Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, Firmware rev. 3.0 or LATER - Manual (Page 60)

60 Publication 1404-UM001F-EN-P - November 2009
Chapter 3 Powermonitor 3000 Unit Operations
Metering Update Rate The metering update rate is a measure of how often the power
monitor calculates new metering results. The metering update rate is
not significant in most applications, but can be important in some
control applications. The metering update rate affects how quickly a
setpoint can respond to an electrical event and affects how often new
metering results are available for communication. The metering
update rate is dependent on the power monitor model and device
configuration.
The table below contains information that can be used to calculate the
metering update rate for a specific model containing specific
configuration selections.
This table lists the minimum and maximum possible metering update
rate for each model based on information from the Metering Update
Rate Calculation table.
Metering Update Rate Calculation Based on Model and Device Configuration
Model and Config Options M4 M5 M6 M8 Update Rate
Base metering update rate
• • • •
50 ms
If device is an M4
•
Add 10 ms
If RMS Resolution = High (see the Advanced
Device Configuration table)
• • • •
Add 10 ms
If catalog # contains ENT, CNT, or DNT
• • • •
Add 5 ms
If the Min/Max log is enabled (see the Min/Max
Log Configuration/Read-back Select table)
• • • •
Add 5 ms
If more than 5 setpoints are configured
• • • •
Add 5 ms
If Oscillography is enabled (see the Oscillograph
Configuration/Read-back Data Select table)
• •
Add 5 ms
If Transient detection is enabled (see the
Transient Analysis Configuration/Read-back
Select
table)
•
Add 15 ms
If Meter Result Set is set to Tranducer mode or
Emergy Meter Mode (see the
Advanced
Metering Configuration table)
•
Subtract 5 ms
Min and Max Metering Update Rate for Each Model
Model Min and Max
Metering Update
Rate
M4 60 … 85 ms
M5 50 … 75 ms
M6 50 … 80 ms
M8 45 … 95 ms