List Of Data Registers - Contrec 515 Operation Manual

List of Data Registers

The following tables describe the addresses and meaning of the data
registers in the instrument. The registers are grouped in blocks that relate to
a particular function of the instrument. The data values are expressed in the
engineering units that were selected for the variables when the instrument
settings were configured.
Note: Conventional numbering of registers often starts from 1, therefore be
The data registers represent different data types as specified in the tables:
•
•
•
The "Programmable Format" data type for 4-byte (2 registers) data values
can be set as either Floating Point or Long Integer via the "Data Type"
program item as described in
The Floating Point variable is represented in IEEE-754 Floating Point
4-byte format and requires two 2-byte data registers:
IEEE-754
1st byte
2nd byte
3rd byte
4th byte
This means that two data registers must be read or written to obtain, or
preset, one data value.
515 BR02 - 15 August 2021
aware that "register 1" in this case has "address 0" and so on.
I - Integer, 2 bytes (Holding Register)
L - Long Integer, 4 bytes (2 registers)
P - Programmable Format, 4 bytes (2 registers)
Modicon Registers
low byte (register X)
high byte (register X)
low byte (register X+1)
high byte (register X+1)
Communications on page 61.
Communications
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