Modicon 984 Plc Compatible Format; Daniel's Extension; Modbus Registers - Thermo Scientific SmartView SV100A User Manual

Setting up Communications
Modbus RTU & ASCII Functions
Modicon 984 PLC
Compatible Format

Daniel's Extension

Modbus Registers

7-8 SV100A/SV10AC User Guide
Sign Bit Exponent
(+127 biased)
1 bit 8 bits
SEEEEEEE | EMMMMMMM
Byte 0 | Byte 1
High Word
This is a 2 x 16 format (2 consecutive register addresses for one floating
point number). The two words MUST always be accessed together to
ensure valid values.
Register 1
Register 2
Registers 7037–7108 store points 1–36 Display Scale data in this format.
This is a 1 x 32 format (1 register for one floating point number).
Register 1
Registers 7001–7036 store points 1–36 Input Value data in this format.
These registers are read-only. Registers 4001–4146 are holding registers
containing Media and Screen information.
The following tables show the mapping of the recorder parameters into
Modbus registers. Knowledge of these Modbus register assignments is only
needed if utilizing third-party communication software.
Note Some registers are reserved or are not used. Use the defined registers
only. ▲
Mantissa
(extra implied 1 bit)
23 bits
| MMMMMMMM
| Byte 2
|
Low Word
High Word
Byte 0, Byte 1, Byte 2, Byte 3
| MMMMMMMM
| Byte 3
Low Word
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