Dec 2019 , 10
Modbus : Prosoft
Modbus:RealPars I
ModBus RealPars II
Rasgbery Pi Server on Docker with VPM remotr access Dropbox back up influx Grafana
Building a 4-node Rashberry PI Cluster
01 (01:hex) == Read Discrete out coils
05 (05: hex) == Write single Discrete output coil
15 (0F:hex) == Write multiple Discrete output coils
02 (02 hex) == Read Discrear output contact
04 (04 hex) == Read Analog input contact
03 (03 hex) == Read Analog output holding registers
06 (06 hex) == Write single Analog output holding registers
16 (10 hex) == Write multiple Analog output holding registers
Modbus : Prosoft
Modbus:RealPars I
ModBus RealPars II
Rasgbery Pi Server on Docker with VPM remotr access Dropbox back up influx Grafana
Building a 4-node Rashberry PI Cluster
- CRC checking at the first Modbus protocal both master and slave
- MOD bus ASCII , Modbus TCP ( Client / Server : Over internet) , Modbus RTU ( Master / Slave Serial communication )
- How Modbus Protocal work ??
- Start with Master sent request to Slave ?
- Master : Slave address + Function code +Data + Error checking === >
- Slave : requeat + Data + Error checking <===
01 (01:hex) == Read Discrete out coils
05 (05: hex) == Write single Discrete output coil
15 (0F:hex) == Write multiple Discrete output coils
02 (02 hex) == Read Discrear output contact
04 (04 hex) == Read Analog input contact
03 (03 hex) == Read Analog output holding registers
06 (06 hex) == Write single Analog output holding registers
16 (10 hex) == Write multiple Analog output holding registers
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