Kael Multiser 02 PC TFT Modbus register map

Sources and notes

• Multiser-02-PC-TFT Hafıza Tablosu · version V2.02
  manufacturer's Modbus register table
• Modbus hafıza tablosu üzerinden dosya okuma
  how the date registers and the microSD file area are used

Source: Kael Elektronik, "Multiser-02-PC-TFT Hafıza Tablosu" (Modbus register table), program version V2.02

• All registers are holding registers, one Modbus address per value. 8-bit values (U8 in the table) occupy a whole register.
• Most measurements are scaled integers or floats that must also be multiplied by the transformer ratios in the same block: CTRF (current transformer ratio) and VTRFwM (voltage transformer ratio with multiplier, in tenths). The description of each register gives the multiplier printed in the table; the scale is the table's divisor.
• The Real Time Date registers pack two bytes each: year (from 2000) and month, day and hour, minute and second, high byte first.
• Energy in watt/second, var/second and VA/second is split into three 16-bit words (EH, H, L, most significant first).
• The table does not give the word order of 32- and 64-bit values; big-endian is assumed.
• The special commands at 0xFFFC-0xFFFF are executed by writing 0x55AA.
• Not in this map: the scope signal buffers and the microSD remote file access area.