A communication method between a master and a device, the master transmits in a subcycle a received condition message (RCM) for an immediately prior subcycle, wherein the RCM is an ACK when a transmission from the device in the preceding subcycle was correctly received and the RCM is a NACK when a transmission from the device in the preceding subcycle was not correctly received, comprising: including in each transmitted condition message a current priority data acknowledgement flag (CPDAF), the CPDAF being transmitted set in each condition message for each subcycle of an offset cycle after the master correctly received in a current cycle a priority data message, the offset cycle being defined as the second and subsequent subcycles of a current cycle and the first subcycle of a next cycle, the CPDAF being transmitted as cleared otherwise.

In some embodiments, systems, apparatuses, and methods are provided herein useful to provide an indication of a stock level of a product support member. Compressed air is directed through a plurality of bores extending through the product support member. A sensor reading of the compressed air can be utilized to determine whether there are products stocked on the product support member due to the products blocking one or more of the bores.

A novel and useful acknowledgement and adaptive frequency hopping mechanism for use in wireless communication systems such as IO-Link Wireless. One or two additional acknowledgement bits are added to packet transmissions. One is a current acknowledgment bit which indicates whether a packet was successfully received anytime during the current cycle. The second bit is a previous acknowledgment bit which indicates whether packets were received successfully anytime during the previous cycle. An adaptive hopping table is constructed using a greedy algorithm which chooses frequencies with the best PER for transmission of higher priority packets, while equalizing the PER products across cycles. A last resort frequency mechanism further improves transmission success by switching to a better performing channel for the last subcycle when previous attempts to transmit a high priority packet have failed.

An actuator in a HVAC system includes a mechanical transducer, an input data connection, a feedback data connection, and a processing circuit. The processing circuit is configured to use a master-slave detection signal communicated via the feedback data connection to select an operating mode for the actuator from a set of multiple potential operating modes including a master operating mode and a slave operating mode. The processing circuit is configured to operate the mechanical transducer in response to a control signal received via the input data connection according to the selected operating mode.

A control system for a crane comprises a mobile terminal, with pre-installed application software for entering a control command for a crane and with a transmitting module for transmitting the control command, a control unit with a receiving module which is suitable for receiving the control command and is capable of being brought into signal linkage with the mobile terminal, the signal linkage being wireless, and at least one crane module in signal linkage with the control unit, for executing the control command.

A PLC maintenance support device according to the present invention includes a signal identification tag reader for reading a signal address from a signal identification tag attached to an input and output signal cable of a PLC to identify the signal address of the input and output signal cable, a transmitter for transmitting the signal address identified by the signal identification tag reader to the PLC, a receiver for receiving the on or off state of a signal corresponding to the transmitted signal address from the PLC, and a monitor for displaying the received on or off state of the signal.

A wireless engine monitoring system for an aircraft engine includes a housing and wireless transceiver that receives engine data, including engine data relating to environmental engine emissions. A processor processes the engine data and generates an alarm report when the environmental engine emissions exceed a threshold.

A system and method prevent product-type contamination in a bulk liquid storage tank. A control unit receives an indication of a storage product type in the bulk storage and a delivery product type in the tanker truck. The control unit compares the delivery product type with the storage product type and controls delivery based on a result of the comparison.

An example system includes a cutting tool and a device configured to remotely control the cutting tool. In response to receiving information indicative of actuation of a first user interface item, the device sends a first signal to the cutting tool so as to request enabling the cutting tool to be operated remotely. The cutting tool sends a second signal to the device indicating that remote operation of the cutting tool has been enabled. The cutting tool receives information indicating that the trigger has been activated, and sends a third signal to the device indicating that the cutting tool is ready to perform a cutting operation. The device receives information indicative of actuation of a second user interface item, and responsively, sends a fourth signal to the cutting tool so as to cause the cutting tool to perform the cutting operation.

Systems, apparatuses, and methods are provided herein related to irrigation control systems. In some embodiments, an irrigation control system includes a router, an access point, and irrigation controller, a wireless adapter, and a mobile device. The mobile device can communicate with the wireless adapter in a direct communication mode in which the wireless adapter creates a wireless network, a first indirect communication mode in which the mobile device and the wireless adapter communicate via the access point while the mobile device is within range of the access point, and a second indirect communication mode in which the mobile device and the wireless adapter communicate via the access point while the mobile device is out of range of the access point.