Chapter 5 Configuring the PM130 PLUS Configuring Communication Protocols
PM130 PLUS Powermeter Series_Installation Operation and Manual 115
5.6 Configuring Communication Protocols
This section describes how to customize protocol options for use with your application software.
5.6.1 Configuring Modbus
Modbus Point Mapping
The PM130 PLUS 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 5-20: 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 PM130 PLUS 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 PM130 PLUS 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.
The 32-bit Modbus registers are factory-set to integer format. To change the register format:
1. Select Protocol Setup from the Meter Setup menu, and click on the Modbus Registers tab.
2. Change the 32-bit register format in the Modbus Options pane.
3. Click Send to download your setup to the meter.
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