An introduction to ISOBUS Sequence Control – ISO 11783 – Part 14

Photo: iStockphoto
Photo: iStockphoto

ISOBUS Sequence Control, as defined in ISO 11783 – part 14, provides the ability for a tractor to record and perform a sequence of actions within either the tractor or its attached implements. The value to the operator is that he can activate a sequence of steps via one button press or action step. Usually, the sequence of steps would occur at the headland of the field. Sequence control simplifies the actions required of the operator at the headland and allows the operator to concentrate on positioning the tractor and implement for another pass through the field. Sequence control also eliminates forgotten steps that can happen near the end of a long day in the field.

The sequence control system consists of a sequence control master (SCM) and one or more sequence control clients (SCC). The SCM as the name suggests, calls the shots in the system. ItĀ  allows the operator to create a sequence of steps either through an editor or by recording the actions the operator performs, similar to recording a macro within a computer program. The SCC performs the actions when told to by the SCM or when the operator activates a control andĀ reports or confirms the actions to the SCM. The ISO 11783 – part 14 specification describes in more detail the expectations of the master and client and how they are to communicate and respond to each other.

ISO 11783 – part 14 allows agricultural machinery owners to have colorblind implements that work in unison with the tractors to which they are connected. Like the entire ISOBUS realm, sequence control is brand independent and operates on a common foundation that allows communication between all brands of ISOBUS enabled equipment. Sequence Control is the most recently added section to the ISOBUS specification, which covers several areas of agricultural equipment interconnectivity. You can learn more about ISOBUS in general here.

About Shawn Pezley

Shawn is a Project Engineer and has been with DISTek Integration since 2002. Projects Shawn has worked on include: Implementation of a sequence control embedded system prototype (ISO 11783-14); development of embedded software within a virtual terminal that met ISO 11783-6 standard; systems level responsibility for in-vehicle displays; automated test systems for testing of products such as paging base stations, two-way radios, satellite phones, latches, and medical research in development and manufacturing environments. Shawn is experienced in C, C#, LabVIEW, TestStand, LabWindows/CVI, Visual Basic, CAN, SAE J1939, and ISO 11783 parts 6 & 14.

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