OPERATION MT100 Multipoint Flow Meter
increments by 1 every time the group 1 registers reach the 65,535.996 count or the set βTotalizer Max Limitβ count. TOTALIZER 2 has a
maximum count of 4,294,967,295, after which it resets back to zero.
The TOTALIZER 1 group maximum count value can be set to a lower value of the default value by the user. This is controlled by service
registers 4115 and 4116 for which values above 65,535.996 are not permitted. The default value of 65,535.996 for TOTALIZER 1 provides
a resolution 0.01 to the MT100 Totalizer value.
To reconstruct the double precision floating point value of the Totalizer using the single precision floating point registers do the following:
πππ‘ππππ§ππ
(
π·ππΉπ
)
= πππ‘ππππ§ππ 2 π£πππ’π Γ πππ‘ππππ§ππ 1 πππ₯ ππππ’π + πππ‘ππππ§ππ 1 π£πππ’π
Table 15 β MT100 Modbus Process Data
Process Variable Values β Daniel Extension
Process Variable Values β Integral Registers
1
Totalizer Value β Single Precision Floating Point (16 Bits)
Process Variables β Engineering Unit Codes
Totalizer Eng. Units Code
Device (Sensor 1) Status Code #1
Device (Sensor 1) Status Code #2
Notes: 1. (D) indicates double precision (64 bits).
2. Data Type: Special1 is a collection of discrete registers that contain a single precision (32-bit) floating point value,
and must be treated and interpreted as a single precision floating point number by the DCS or the PLC. Special2 is
a collection of discrete registers that contain a double precision (64-bit) floating point value, and must be treated and
interpreted as a double precision floating point number by the DCS or the PLC.
3. Pressure variable is not applicable to the MT100.
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