Micronics U1000MKII-FM, User Manual

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U1000MKII User Manual Micronics
Page 36 Issue 3.1 July 19
4.4.2 Select Slave Function
COMMAND: SEND_NKE
DESCRIPTION: Initialise / Reset slave device for communications.
DIRECTION: MASTER TO SLAVE
FRAME TYPE: SHORT / LONG FRAME
PRIMARY ADDRESSING SECONDARY ADDRESSING
NAME CODE NAME CODE
START 0x10 START 0x68
(C - FIELD)
INITIALISE SLAVE
0x40 LENGTH 0x0B
(A - FIELD)
SLAVE PRIMARY ADDRESS
0xXX LENGTH 0x0B
CHECKSUM 0xXX START 0x68
STOP 0x16 (C
–
FIELD)
INITIALISE SLAVE
0x73
(A
–
FIELD)
USE SECONDARY ADDRESSING
0xFD
(CI
–
FIELD)
INITIALISE SLAVE
0x52
M-Bus IIN (BYTE 1) 0xXX
M-Bus IIN (BYTE 2) 0xXX
M-Bus IIN (BYTE 3) 0xXX
M-Bus IIN (BYTE 4) 0xXX
MANF. ID (BYTE 1) 0xCD
MANF. ID (BYTE 2) 0x54
VERSION NUMBER 0x01
DEVICE TYPE ID 0x04
CHECKSUM 0xXX
STOP 0x16
MASTER TO SLAVE: SEND_NKE
SLAVE TO MASTER: ACK
4.4.3 Data Transfer Functions
No VARIABLE TYPE SELECTION BITS
1 FLOW RATE IEEE754 FLOAT LITRES / MINUTE
2 ENERGY IEEE754 FLOAT kWh
3 POWER IEEE754 FLOAT kW
4 TEMPERATURE (COLD) IEEE754 FLOAT CELCIUS
5 TEMPERATURE (HOT) IEEE754 FLOAT CELCIUS
6 TEMPERATURE (DIFFERENCE) IEEE754 FLOAT CELCIUS