Manual BG41/BG42/BG43 Software
Rev. 99/49 4-89
4.2.5 PLC interface parameter channel
By means of the parameter channel (channel 0), the building block can be given different
commands, which are significant for the input/output channel.
With software it is possible to
•= reset or re-parametrize the building block
•= read or set the date/time
•= determine the protocol for the interface
•= set the baud rate and the data format for the serial interface module
•= issue the firmware’s version number.
The commands are given to the command channel in the form of one or multiple instructions. The
first byte is the so-called command byte and contains the number of the command in the left (high)
nibble and the number of the channel for which the command is for in the right (low) nibble.
Fig. 4-19: Command byte parameter channel
The following commands are available:
0 Reset the entire building block
1 Reset the transmission and reception buffer for one channel
2 Change the baud rate for one channel
3 Change the data format for one channel
4 Operate the clock
5 Select a protocol
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