Radio Configuration Registers

WARNING!

Changing the parameters concerning the transmission configuration will only take effect after restarting the module or reload settings–register (40001).

Radio TX Power (40242)

The register contains radio transmission signal power. The signal strength depends on the distance between devices and the environment conditions.

Radio Channel (40243)

The register contains information about a radio channel. All modules, which work in the same group, require the same channel number. More than one wireless network can be used but each of them has to operate on a different channel. Each channel cannot have any influence on each other (see the Radio Baud Rate section).

Radio Baud Rate (40244)

The register contains the baud rate used in radio protocol. All devices, which work in the same group (the same channel), require the same baud rate value. Different baud rate values can be used for the RS485 bus and for radio protocol.

Higher baud rate value requires more bandwidth, which can occur on adjacent channels.

The table below shows the dependencies between these parameters.

Radio AESKEY (40249-40256)

The registers contain encryption keys for radio protocol.

Each package transmitted by the radio protocol is encrypted by the AES-128 algorithm. It protects the network against unauthorized access. The encryption uses 128-bits key stored in 8 registers (8x16 bits). Each device, which works in the same group, requires the same encryption key.

Radio Received Frames Counter (40257)

The 32-bit register contains the number of valid messages received by the module via radio protocol from last power up. The register value is reset after a power cycle or after changing transmission parameters (baud rate, stop bits, parity, etc.).

Radio ERROR Frames Counter (40259)

The 32-bit register contains the number of error messages received by the module via radio from last power up. The value is reset after a power cycle or after changing transmission parameters (baud rate, stop bits, parity, etc.).

Radio Transmitted Frames Counter (40261)

The 32-bit register contains the number of transmitted messages by the module via radio from last power up. The value is reset after power cycle or after changing transmission parameters (baud rate, stop bits, parity, etc.).

Wireless Device Status (40263-40390)

The register contains information about the signal strength of the other W0202 modules operating on the same channel. Each device has its own register for status indication.

The device number equals the Modbus address of this device.

The particular register contains information about the signal strength in dBm and remote device status.