SATEC EM720 Operation Manual - Manual (Page 120)

Chapter 5 Configuring the EM720
Configuring Communication Protocols
120 EM720 Power Quality and Revenue Meter
Configuring Communication Protocols
This section describes how to customize protocol options for
use with your application software.
Configuring Modbus
Modbus Point Mapping
The EM720 provides 120 user assignable registers in the
address range of 0 to 119. You can re-map any register
available in the device 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. From the Meter Setup menu select Protocol Setup and
click on the Modbus Registers tab.
2. Click on the Default button to cause the assignable
registers to reference the actual default device register
11776 (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
EM720 Modbus Reference Guide for a list of the
available registers. Note that 32-bit Modbus registers
should always start at an even register address.