MVB device status word transmission method based on load balance

The invention discloses an MVB device status word transmission method based on load balance. Before bus resource allocation, all cyclic loads in a whole macrocycle are calculated according to allocation of application ports, calculation results are sequenced from small to large, and roll poling of a device status word is inserted in a low-load cycle in a single cycle according to the sequencing result. The method has the advantages that the principle is simple, network loads can be optimized, and correctness and stability of device state display are guaranteed.