E-Mon E-PS-E-RTU-N - Manual (Page 104)

Chapter 5 Configuring the PowerSmart+ PQM Configuring Communication Protocols
104 PowerSmart+ Power Quality Meter
5.6 Configuring Communication Protocols
This section describes how to customize protocol options for use with your
application software.
Configuring Modbus
Modbus Point Mapping
The PowerSmart+ PQM provides 120 user assignable registers at
addresses 0 to 119. You can re-map any register available in the meter to
any assignable register so that registers found at different locations may
be accessed with a single request by re-mapping them to adjacent
addresses.
Initially these registers are reserved and none of them points to an actual
data register. To build your Modbus register map:
1. Select Protocol Setup from the Meter Setup menu, and click on
the Modbus Registers tab.
2. Click on the Default button to cause the assignable registers to
reference the actual default meter register 6656 (0 through 119
are not allowable register addresses for re-mapping).
Figure 5-21: Protocol Setup Dialog Box – Modbus Registers Tab
3. Type in the actual addresses you want to read from or write to via
the assignable registers. Refer to the PowerSmart+ PQM
Modbus Reference Guide for a list of the available registers. Note
that 32-bit Modbus registers should always start at an even
register address.
4. Click Send to download your setup to the meter.
Changing 32-bit Register Format
The PowerSmart+ PQM allows you to read 32-bit Modbus analog
registers, energy counters and binary counters either in integer format, or
in IEEE single precision floating point format.