P Rogramming - RayTek MI3 Operating Instructions Manual

15.2 Programming
Functions codes and start addresses are listed in decimal.
15.2.1 Supported Functions
Function code
01
02
03
04
06
16
15.2.2 Parameter Data
32 bit registers are transmitted in full Big-Endian mode, meaning most significant word is transmitted
first, least significant word is transmitted last. The byte order within a word is Big-Endian as well.
While some registers hold integer values, there are some holding floating points. The interchange
formats of the IEEE-754 standard for Floating-Point Arithmetic is used for representing floating
points.
The following table lists all parameters, its content, their formats and usage.
15.2.2.1 Box Parameter
<k> ... number of output channel, depending on the number of physically installed output channels of
the Comm Box.
Items (registers, discretes or coils) are addressed starting at zero. Therefore items numbered 1-10000
are addressed as 0-9999.
Start Size Modbus Access Data
address [bits]
1 16 input register
10 64 input register
20 64 input register
30 64 input register
40 16 input register
50 32 input register
60 32 holding register integer Baud rate RS485
70 16 holding register char
80 32 input register
90 16 holding register short
MI3
Modbus Function
Read Coils
Read Discrete Inputs
Read Holding Registers
Read Input Registers
Write Single Register
Write Multiple Registers
Content
Type
short error code for last
request
hex Serial number
string Unit identification
string Box Firmware Revision e.g. 2.10
short Modbus slave address 1 .. 247
string Box special
Temperature Unit
float Box Temperature
Switch panel lock
Rev. G Nov/2015
Description
Read n bits
Read n bits
Read n 16 bit words
Read n 16 bit words
Write a 16 bit word
Write n 16 bit words
Values
0: no error
1: value out of range
2: illegal head number
3: illegal analog output number
4: illegal output mode
5: output disabled error
99: unspecified error
e.g. 98123
e.g. MI3COMM
e.g. RAY, LAS
9600, 19200, 38400, 57600, 115200
0x43 ('C'), 0x46 ('F')
0: unlocked, 1: locked
Modbus
MI3[M]
command
-
XV
XU
XR
XAS
DS
BR
U
XJ
J
99