7.10. Sterownik calecdmn

• Zgodność ze specyfikacją: 4 .

• Obsługiwane urządzenia: Ciepłomierz Aquametro CALEC MCP-300.

• Protokół komunikacji: Calec protocol.

  Serial port settings: 9600 8N1 Wiring: RX, TX, GND

  Protocol:

  Q: AM

  R: OK

  Q: R4

  R: ACK

  Q: [AD1,AD2] (register address in MCP format, see below)

  R: [data] (4 bytes)

  R: [checksum] (1 byte - lower byte of arithmetic sum of previous 6 bytes, starting from AD1)

  MCP address format, R is register address:

  AD2 = R & 0xFF

  AD1 = ((R >> 8) & 0x07) | ((R & 0x70) << 1)

  Data may be:

  - fixedpoint: unsigned integer, 7 digits, coding: 1111 bbbb bbbb bbbb bbbb bbbb 0000 dddd, 'b' bits code 6 last digits, 'd' bits code first digit, so if E is 4 bytes encoded representation, value is:

  val = 1000000 * (E & 0x0F) + (E >> 8) & 0xFFFFF

  - floating point: coding: s1mm mmmm mmmm mmmm mmmm mmmm eeee eeee, s is sign, 0 - positive, 1 - negative, mantisa M = 0.1mmmmmmmmmmmmmmmmmmmmmmmmm, E = eeeeeeee : -127 << 127 (signed 7 bytes integer), value = M*2^E. If value is negative, 3 first bytes are inverted (bit by bit).

  Available registers (value, address, number of bytes, coding, unit):

  1 Energy meter 0x2000 4 fixedpoint 10 * MWh

  2 Volume meter 0x2040 4 fixedpoint 10 * t

  3 Output temperature 0x2080 4 floatingpoint C degree

  4 Return temperature 0x2084 4 floatingpoint C degree

  5 Temperature difference 0x2088 4 floatingpoint C degree

  6 Flow 0x2098 4 floatingpoint kg/h

  7 Power 0x209c 4 floatingpoint kW

  8 Serial number 0x0100 16 ASCII

  9 Number of impulses 0x018c 4 floatingpoint -

  Daemon outputs 8 values:

  1. Energy meter, most significant word, MWh, precision 1

  2. Energy meter, less significant word

  3. Volume meter, most significant word, t, precision 1

  4. Volume meter, less significant word

  5. Output temperature, precision 2

  6. Return temperature, precision 2

  7. Flow, m3/h, precision 2

  8. Power, kW, precision 1