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Electro Industries/Gauge Tech
Doc # E134-7-15 V1.01
A-5
Receive >
The minimum time between receiving a request and transmitting a response,
Transmit Delay
measured in 100 microseconds (0-25.5 msec).
Register:
An entry or record that stores a small amount of data.
Register Rollover:
A point at which a Register reaches its maximum value and rolls over to zero.
Reset:
Logs are cleared or new (or default) values are sent to counters or timers.
Residual Energy:
Accumulated energy not yet allocated as pulses.
Rolling Window
The Rolling (Sliding) Window Average is the average power calculated over a
Average (Power):
user-set time interval that is derived from a specified number of sub-intervals,
each of a specified time. For example, the average is calculated over a
15-minute interval by calculating the sum of the average of three consecutive
5-minute intervals. This demand calculation methodology has been adopted by
several utilities to prevent customer manipulation of kW demand by simply
spreading peak demand across two intervals.
Rollover:
The largest value that Transition Accumulators for a channel can obtain.
RS-232:
A type of serial network connection that connects two devices to enable
communication between devices. An RS-232 connection connects only two
points. Distance between devices is typically limited to fairly short runs.
Current standards recommend a maximum of 50 feet but some users have had
success with runs up to 100 feet. Communications speed is typically in the
range of 1200 bits per second to 57,600 bits per second. RS-232
communication can be accomplished using the Optical port on the face of the
1262/1272 Nexus.
RS-485:
A type of serial network connection that connects two or more devices to enable
communication between the devices. An RS-485 connection will allow
multi-drop communication from one to many points. Distance between devices
is typically limited to around 2,000 to 3,000 wire feet. Communications speed
is typically in the range of 120 bits per second to 115,000 bits per second.
Sag:
A voltage quality event during which the RMS voltage is lower than normal for
a period of time, typically from 1/2 cycle to 1 minute.
Secondary Rated:
Any Register or pulse output that does not use any CT or VT Ratio.
Serial Port:
The type of port used to directly interface with a PC.
Slave Device:
In Modbus communication, a Slave Device only receives a Request Packet from
a Master Device and responds to the request. A Slave Device cannot initiate
communication.
Swell:
A voltage quality event during which the RMS voltage is higher than normal for
a period of time, typically from 1/2 cycle to 1 minute.
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