Oldham MX 43 User Manual

11 – RS485 Digital Output
71
- Slave number for the unit (defined by COM 43) 02 = 0x02
- Operating type (03 = read) 03 = 0x03
- Address of the 1
st
word 2000+96 = 0x0830
- Number of words to read 01 = 0x0001
- CRC
Thread: 0x02 0x03 0x08 0x30 0x00 0x01 0x86 0x56
Example
Access the status of the sensor located at analog input 5 of unit n° 2.
A. Calculation of the table index: 256 + 5 = 261
B. Request script:
- Slave number for the unit (defined by COM 43) 02 = 0x02
- Operating type (03 = read) 03 = 0x03
- Address of the 1
st
word 2300 + 261 = 0x0A01
- Number of words to read 01 = 0x0001
- CRC
Thread: 0x01 0x03 0x0A 0x01 0x00 0x01 0xD6 0x21
Address Table
Supervision of the MX 43 sensors
All reading requests for the Modbus are done via function 3. The cartography
is shown below:
0
Slave address
management
From addresses 0 to 1999, the Modbus
request address serves to select a slave.
The response consists of a data structure
corresponding to the slave configuration
outlined below.
2000
65535
Standard address
management.
From addresses 2000 to 65535 the
address management is typical Modbus
address management.

Oldham MX 43 Specifications

General

Brand	Oldham
Model	MX 43
Category	Controller
Language	English