Configuring Communication Protocols
This section describes how to customize protocol options for use with your
application software.
Configuring Modbus
Modbus Point Mapping
The PM172 provides 120 user assignable registers in the address range of 0
to 119. You can re-map any register available in the meter to any assignable
register so that Modbus registers that reside at different locations may be
simply accessed using 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 own 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).
3. Type in the actual addresses you want to read from or
write to via the assignable registers. Refer to the PM172
Modbus Reference Guide for a list of the available
registers. Notice that 32-bit Modbus registers should
always start at an even register address.
4. Click Send to download your setup to the meter.
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