Predefined memory areas are available for addressing the process data. Optionally, you can access the input and output data areas bit by bit (using coils) or word by word.
Register area for word by word access
|Modbus Address area
|1 – 256
|Values that the other RevPi Gate supplies.
|1025 – 1280
|Values that are supplied to the other RevPi Gate.
|Displays the connection status to the other RevPi Gate.
|Initialisation, checking Hardware.
|Connection to the other gateway component is checked.
|Other gateway component detected.
|Communication to the other gateway component established.
|Fieldbus status of the other gateway component
|Fieldbus not connected. Check all Connections.
|Fieldbus connected, no data communication. Check whether an IP address is set.
|Gateway component configured, no data communication.
|Cyclical data Exchange.
|IP Address High Word
|IP Address Low Word
|Network Mask High Word
|Network Mask Low Word
|Gateway Address High Word
|Gateway Address Low Word
|Max. Number of Modbus/TCP connections
|Shows the maximum number of Modbus/TCP connections that can exist simultaneously.
Value Range: 2-20
|Current number of Modbus/TCP connections
|Shows the current number of Modbus/TCP Connections.
|The write timeout function is active if there is a value > 0 in this Register.
It specifies the time interval at which at least one of the output registers must be written As soon as the time has elapsed since the last write, all output registers are set to the default value 0.
|Restarts the RevPi Gate if 0x4b42 is written here.
*Input and holding registers are not distinguished. They can be read via function code 0x04
Register area for bit by bit access
|1 – 3840
|Input Bits (Coil)
|Values that the other gateway component supplies.
|16385 – 20224
|Output Bits (Coil)
|Values that are supplied to the other gateway component.
*Input and Holding Register are not differentiated. They can be read using function code 0x004.
You can access the data area of the gateway component using the following functions:
|Max. size per telegram
|Read data bit by bit
|read discrete inputs
|Write data bit by bit
|write single coil
|write multiple coils
|Read data word by word
|read holding registers
|read input registers
|Writedata word by word
|write single register
|write multiple registers
|mask write register
|Read and write data word by word
|read/write multiple registers
|Read 125 words
Write 121 words