8-30
8.98: Action Block - Resetting EPM Registers (57345-57393)
Most of the Registers in the Action Block are used to perform an action, reset an EPM Register.
Unless otherwise stated, the action is performed when a value, any value, is written to that Register.
Example: In order to Reset Maximum Value in Meter Address 1, any value, such as ‘1’(0x00001)
should be written to Register 57346 (0x0E001). The appropriate Modbus RTU command for this
example would be: 01 06 E001 0001 2E0A (See Chapter 1 for Modbus protocol overview.)
QDescription: Action Registers included in this block:
Log Reset (57345): This Register, when written with any value, causes all logs to be cleared. This
action should be performed only under the following two circumstances:
1. When the Programmable Settings are modified, such that data already in the logs is invalidated.
For Example, any modifications involving the record size or organization of the contents of a
snapshot would require the logs to be cleared of any previous data.
2. When the Run-Time Code is upgraded, resulting in one of the following:
Redefinition of the layout or meaning of the Programmable Settings.
Altered behavior or capabilities of the logs.
NOTE: Log Reset should be performed automatically by the software in either case and should not
be an action directly available to the user. (See Chapter 5.)
Maximum Reset (57346): This Register, when written with any value, causes all Maximum Values
to be cleared.
Minimum Reset (57347): This Register, when written with any value, causes all Minimum Values
to be cleared.
Energy Reset (57348): This Register, when written with any value, causes all Energy Values to be
cleared.
Registers for the Meter Calibration (57349-57377): These Registers are for factory use only.
Meter’s Calibrations are done through these Registers.
Registers 57380-57382: These Registers are no longer used. Internal KYZ Enable, Internal KYZ
Minimum Pulse Width, Internal KYZ Pulses/Whr sec are obsolete.
Waveform Calibration (57383-57384): Waveform Calibration should be performed when wave-
form sampling is running at rates of 16, 32, 64 or 128 samples per cycle. Waveform Calibration
should not be performed when waveform sampling is running at 256 or 512 samples per cycle. If
the unit needs waveform recalibration and is running at 256 or 512 samples per cycle, reprogram the
meter to one of the other sampling rates, recalibrate, then return the unit to its original sampling rate.
Voltage Calibration (57383): When written, the Register initiates a calibration of the Voltage
Channels of the Waveform Capture section of the EPM Main Unit. An accurate and stable 60Hz
sinusoial voltage input should be applied to all voltage channels of the unit prior to the writing of
this Register. Phase relationships between the voltage channels are immaterial. The magnitude of