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@@ -0,0 +1,68 @@ +modbuslog - 2012/01/10 +-------------------- + +modbuslog is a program designed to read from a modbus device at predefined +intervals and store the output to file. + + +Compilation: +-------------------- +modbuslog requires the libconfig (>1.4.8) and libmodbus (>3.0.1) libraries, +and will not function without these libraries installed. Neither of these +libraries are currently available (or if they are, are not of sufficient +version) in the current Debian Stable release codenamed "Squeeze". This +means that these dependencies must be manually fulfilled. + +libmodbus: It should be sufficient to backport the current version of + libmodbus from Debian Testing codenamed "Wheezy" + http://packages.debian.org/wheezy/i386/libmodbus5/download + http://packages.debian.org/wheezy/i386/libmodbus-dev/download + +libconfig: An older, incompatible version of libconfig currently exists + in Debian Squeeze (right the way up to Sid). An updated package + has been created and will hopefully be included in the next + Debian Stable release. In the mean time it is available here: + http://mentors.debian.net/package/libconfig + When it gets accepted, it will be available here: + http://packages.debian.org/source/testing/libconfig + +modbuslog uses a Makefile to ease compilation, and as such, can be compiled +by simple navigating to the directory and running "make". This will recompile +any packages that need to be compiled. + +These files can then be moved to the required directories on the target system. + + +Required files: +-------------------- + +/sbin/modbuslog executable program +/etc/modbuslog.cfg configuration file +/var/modbuslog/ output directory where logs are stored +/var/modbuslog/interval/interval.txt textfile storing unique interval + + +Configuration: +-------------------- + +The configuration file for modbuslog is stored in /etc/modbuslog.cfg, and is +arranged in a hierarchical structure suitable for libconfig. + +The modbus section defines the standard operating parameters for the modbus +device, These include: + 1) device serial port in use + 2) baud baud rate in use + 3) data_bits number of data bits, commonly 8. + 4) parity parity, commonly E (even) or N (None). + 5) stop_bits stop bits, commonly 1. + 6) retry number of retries for each failed reading. + +The reading section defines the unique reading times that the program is +required to log at. Each entry must contain: + 1) slaveid modbus slave id + 2) registertype type of modbus reading + 3) startaddress register to start reading from + 4) numregisters number of registers to read + 5) intervalvalue read register every x + 6) intervalunit (m) minutes or (h) hours + |