This header file is generated by pvdevelop. It contains definitions for the shared memory and the mailbox used to interface to modbus. It is derived from your modbus ini-file.
// Modbus Signal assignment of modbusdaemon #define modbusdaemon_SHARED_MEMORY "/srv/automation/shm/modbus.shm" #define modbusdaemon_MAILBOX "/srv/automation/mbx/modbus.mbx" #define modbusdaemon_CYCLE1_BASE 0 #define modbusdaemon_CYCLE1_NUM 10 #define modbusdaemon_CYCLE1_NUM_BYTES 2 #define modbusdaemon_SHARED_MEMORY_SIZE 2