Abstract: A translator apparatus includes a first transceiver for a Modbus RTU network having a register map of values, and a second transceiver for an INCOM network of INCOM devices having a plurality of different maps of objects and INCOM commands. A processor includes first and second interfaces to the respective first and second transceivers, and a communication routine adapted to: receive a request based upon the register map through the first transceiver related to the INCOM device objects which are responsive to different INCOM commands, send an INCOM command related to one or more of the INCOM device objects through the second transceiver, receive a response based upon the command through the second transceiver related to the INCOM device objects, and send a response based upon the register map through the first transceiver related to the INCOM device objects.

Abstract: A translator apparatus includes a first transceiver for a Modbus RTU network having a register map of values, and a second transceiver for an INCOM network of INCOM devices having a plurality of different maps of objects and INCOM commands. A processor includes first and second interfaces to the respective first and second transceivers, and a communication routine adapted to: receive a request based upon the register map through the first transceiver related to the INCOM device objects which are responsive to different INCOM commands, send an INCOM command related to one or more of the INCOM device objects through the second transceiver, receive a response based upon the command through the second transceiver related to the INCOM device objects, and send a response based upon the register map through the first transceiver related to the INCOM device objects.

Abstract: A logic controller apparatus for solving ladder logic includes first memory locations for storing representations of the ladder logic and second memory locations for storing a plurality of input and output digital logic signals. A processor employs at least some of the digital logic signals for solving the representations of the ladder logic. A representation of ladder logic power flowing from a power rail to a neutral rail flows in a forward direction from a first port to a second port of at least one of a plurality of ladder functional devices, such as contacts. The contacts are organized in a plurality of rows which include at least one of the contacts. The ladder logic power representation also flows in a reverse direction from the second port to the first port of at least another one of the functional devices.

Abstract: A PC computer monitors the energy consumed at a plurality of local stations placed behind the electrical meter of the utility company for individual billing of the local users, a bidirectional communication line being used between the PC computer and the plurality of local stations. A command from the PC computer causes the totalized energy to be stored at each station, and thereafter the PC computer derives individually the results for separate energy estimations and central billing.

Abstract: A compressor coupled to a load of smaller capacity is provided for loading with a setpoint adjusting circuit substituting a pseudo-setpoint signal for the pressure signal derived from the load, so that the master-controller operates in response to a signal increasing gradually from a low initial value until matching in magnitude with the assigned setpoint signal for normal operation. The master-controller is modified so as to bypass the normal modulation means during loading, a minimum inlet valve opening being imposed initially and concurrently the bypass valve being allowed to close under the low initial value, inlet valve control being enabled after the bypass valve has closed and in accordance with said gradual increase of the pseudo-setpoint signal. After load pressure has reached the assigned pressure setpoint in magnitude, the master-controller normal operation is reinstated.

Abstract: In a compressor control system, a subcontroller is coupled with the master-controller in order to detect, when the bypass valve is being modulated, whether there is a deviation between the minimum inlet valve position assigned to the system and the actual inlet valve position. In such case, correction of the inlet valve position is automatically effected by the subcontroller in either direction to restore the minimum assigned inlet valve position.

Abstract: In a compressor control system, surge upon a sharp demand for lower airflow is avoided by placing an offset value above the minimum airflow absolute limit. When reaching downward under inlet valve modulation such offset limit, the master-controller initiates bypass valve modulation and a subcontroller brings the inlet valve from the offset limit down to the absolute minimum airflow position. Provision is made against exceeding the offset limits during such excessive demand downward by imposing a limit to the inlet valve position command. Upon a return upward toward normal operation, provision is made against an intervening and sudden downward demand by imposing a limit to the inlet valve position command representing the minimum airflow operation.

Abstract: In a compressor system, surge detection is provided by sensing the current of the motor driving the compressor and reading oscillations of the current about the average thereof and above and below two opposite threshold levels from such average current and counting the polarity changes within a time interval containing so many samples of the current and defining a sliding window.

Abstract: A system permitting VT (Variable Time) fuze setting information to be transmitted thereto from a remote fire control source via a microwave link when the fuze is chambered in a gun barrel prior to the firing of an artillery shell to which the fuze is affixed. Sufficient microwave power is initially transmitted to the fuze by means of the barrel acting as a microwave transmission line wherein the microwave power received is converted to a DC voltage which is stored and used to bias the fuze circuitry which subsequently receives binary detonating data AM modulated on a microwave carrier.