Formats; Value Readout Via Modbus; Value Update Via Modbus - Honeywell Elster EK280 Applications Manual

EK280

6.6.2 Formats

Meanings of formats used:
Format Description
3 Ushort, 16 Bit
4 Ulong, 32 Bit
9 Counter6
12 Array2, BCD, 4 Bit
Code Format Number of registers
a) binary formats:
3 Number
4 Number
32 Exponential
9 Counter
b) decimal formats:
BCD
Counter *
17
BCD time
stamp *
16 BCD number
12 BCD time
* Counter or time stamp, depending on assigned LIS-200 Address (see below)
** CC = century, YY = year, MM = month, DD = day, hh = hour, mm = minute, ss = second

6.6.3 Value readout via Modbus

For reading values the Modbus functions "Read Holding Registers" (3) and "Read Input Registers" (4) are
implemented.
Readout of values is described in document [6] Modbus Communication with EK2x0_V2.0_*.pdf.

6.6.4 Value update via Modbus

For changing values the Modbus functions "Write Single Register" (6), and "Write Multiple Registers" (16) are
implemented.
Update of values is described in document [6] Modbus Communication with EK2x0_V2.0_*.pdf.
Application Manual
1 Value
MS Word
2
upper part
Bit 31
2
Sign
MS Word
Pre-decimal
3
position upper
part
MS Word
4
Pre-decimal position
MS Word
4
CCYY **
MS Word
3
1 hhmm **
Format Description
16 Array6, BCD, 12 Bit
17 Array8, BCD, 16 Bit
32 IEEEfloat, 32 Bit
LS Word
lower part
MS Word
Bit 30...23 Bit 22...16
Mantissa
Exponent
upper part
... LS Word
Pre-decimal
position lower Fractional digits
part
...
...
MMDD ** hhmm **
... LS Word
12 digits
LS Word
Bit 15...0
Mantissa
lower part
... LS Word
Fractional digits
... LS Word
ss00 **
64