4 Configuring the device
4.2 MODBUS register
NZM-XMC Measuring and Communication Module
11/16 MN01219001Z-EN
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4.2.1 Electrical parameters
Registers 0 to 95 (or 287) store the electrical values measured by the device
(actual values).
Two Modbus registers are required for each value. This means that each
parameter represents a register with a length of 32 bits (of “signed long”
type).
The even-numbered register (left-hand side of the “Register” column in
Table 9) contains the high section of the integer value, whilst the odd-
numbered register with the (right-hand side of the “Register” column in
Table 9) contains the low section of the integer value.
The following Table 9 lists the electrical parameters.
￫
Some Modbus drivers decrement the register number
automatically according to the original convention of the
Modbus system. This is also the case with drivers of XC
controllers.
In other words, the register number of the desired parameter in
the application must be incremented by 1 in the query.
Example:
If, for example, L1 current is to be polled, register addresses 3
(= 2 + 1) (high) and 4 ( = 3 + 1) (low) must be polled.
