Application Operation; Periodic Transmission - ADEUNIS WMBUS MODBUS MASTER Guide Utilisateur

WMBUS MODBUS MASTER - Guide utilisateur / User guide version V1.0.0

2.2. Application operation

2.2.1 Periodic transmission

The product allows the measurement and the periodic transmission of the values of the sensors according to the following diagram:
The parameters associated with this mode of operation are:
• Transmission period (register S301).
• External load supply time before the Modbus request (register 322)
• Definition of periodic data (registers S330 to S339)
The complete list of registers can be found in paragraph 3.4.
Example:
Register
S301
S322
S330
S331
Product in standby
Non
reached?
Read slave register (s)
Send frame 0x44
Value encoding Value
Decimal 180
Decimal 200
Hexadecimal 0x01151802
Hexadecimal 0x570ED814
Period
Oui
Result
Periodic mode with a period of 180x20s = 3600 seconds =
1h
The supply time of the external load (slave) before the
Modbus request is 200x100 = 20000ms ie 20s
Periodic data 2 configuration:
• Slave address = 0x01
• First register address = 0x1518
• Modbus registers type : holding registers
• Number of registers = 2
Periodic data 2 configuration:
• Slave address = 0x57
• First register address = 0x0ED8
• Modbus registers type : input registers
• Number of registers = 4
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