MicroNet SP9121 Instrukcja Obsługi Pobierz pdf (Strona 144)

B Protocols TAC Xenta Server – Gateway, Technical Manual

144 (184) Schneider Electric Buildings AB, June 2011

04-00124-06-en

Xenta 913 to read the register’s value once at start-up before it

assumes control of it.

• Coefficient Gain and Offset

– Allow the raw register value to be

converted into the desired absolute units. If the raw register value

is a real number then normally no conversion is necessary and the

default gain and offset of 1 and 0 can be used. But if the raw regis-

ter value is an integer then it often needs to have a gain and offset

applied.

As an example, a power meter might generate voltage values as

unsigned integers with the actual voltage multiplied by 10. In this

case the Xenta 913’s gain should be set to 0.1 to convert the raw

units (10*V) into the required absolute units (V).

• Signal DataType

– Is set to a default of BOOL, INTEGER or

REAL based on the selected register type. But the default data

type may subsequently need to be changed to suit the applied con-

version coefficient. For example, if a gain of 0.1 is applied to an

integer it will produce a real value, so the default DataType would

be changed to REAL in this case.

• Signal Measurement System

– The measurement system param-

eters need to be manually set to match the absolute form of the

being either an enumeration or analogue engineering unit as appli-

cable.

Note

•The W and R/W I/O options should only be selected for the reg-

ister types that are described as having read and write capability

in the preceding Register Number table.

Note

• For the Modbus TCP protocol, communications are improved if

the signals (register addresses) are added in sequence in the

device editor starting with the lowest register number.

1 2 ... 139 140 141 142 143 144 145 146 147 148 149 ... 183 184

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MicroNet SP9121 Instrukcja Obsługi Strona 144