E-Mon Energy Software - Manual (Page 80)

Recorder
E-Mon Energy User Manual 8-3 E-MON
How does the Recorder Communicate?
E-Mon Energy™ communicates with the recorders in several ways, depending on your recorder type. Typically,
there are 2 types of setups:
• On-site – PC connecting to recorders via a direct serial port or LAN (intranet).
• Off-site – PC connecting to recorders via a modem (telco or cellular) or WAN (Internet).
For additional information see the section on Communication Parameters.
How does E-Mon Energy Recognize a Recorder?
E-Mon Energy communicates with the recorders via a serial protocol known as EZ7. EZ7 is a character-oriented
protocol with request and response capabilities. It operates in the half-duplex, stop-and-wait mode. Each block of
message is terminated by a 16-bit CRC. EZ7 is used to communicate between multipoint/multi-drop in which there
is a single master (computer). E-Mon Energy controls all message transfers to and from a community of slave
devices – IDR/Class 3000. Each device must have a unique ID code (1A through 8Z for recorders and 1A1 through
8Z8 for meters), in a physical connection. When a new recorder is added, E-Mon Energy will scan by querying the
ID code. Once a new device is detected, it will provide the option to add that device to the database.
Communication Setup
Baud Rate: 2400, 4800, 9600, 19200 (default 9600)
Parity: None
Parity Bits: 8
Stop Bits: 1
Within the same physical connection, if more than one recorder has the same ID
code, the response to a command will result in data and errors. In such case, none
of the duplicated recorders are able to communicate successfully.
When a recorder is first brought online, it can be preconfigured from the factory or locally at an installed time by a
technician or it can be in an un-initialized state. If the recorder is in an un-initialize mode, it must be initialized in
order for it to collect and store data correctly. Refer to the Initializing a Recorder procedure within this section.
The Data Recorder Parameters include:
• Real-time clock – Each recorder has its own clock with battery backup for time keeping.
• Profile Interval – Sets the sampling rate for recording interval data with date/time stamp.
• Peak Demand – Sets the peak demand interval of 15, 30, or 60 minutes to calculate peak usage.
• Rolling Demand – Sets the demand window to 5, 15 minutes, or none.
• End of Interval – At the present time, this setting is defaulted to “Built-In Clock.”
• Time Adjustment – Sets time range for automatic real-time clock adjustment.
• Time Zone – Sets time zone where recorder is physically located.
The Recorder parameters are configured in the E-Mon Energy Access window. After configuring, a user can send
the information to the recorder. The following diagram illustrates the Data Recorder process.