To provide a controller capable of facilitating changing of the order of robot cells, a control system, and a ladder program. A master PLC includes a master input unit that receives a first input signal indicating the order of operation of robot cells, and a second input signal indicating work completion in the robot cells from each of the plurality of robot cells; a master output unit that outputs an output signal for instruction of operation to the robot cell specified on the basis of combination of the first input signals, and the second input signal according to the ladder program; and a storage unit that stores a plurality of the ladder programs corresponding to a plurality of patterns of the order of operation comprising at least some of the plurality of robot cells.

A ladder display system includes: a first controller having a first ladder program; and a second controller having a second ladder program that performs input/output processing with the first ladder program. An input/output signal table generating unit generates an input/output signal table relating an input/output signal of the first ladder program to an input/output signal of the second ladder program. An external reference execution unit specifies a signal of the second ladder program and requests transmission of at least a part of the first ladder program. A ladder program output unit transmits at least a part of the first ladder program including a signal corresponding to the specified signal to the second controller. A ladder program display unit displays at least the part of the first ladder program output by the ladder program output unit on the second controller.

A program development support unit includes an arithmetic unit and a storage unit. A ladder diagram editing program and an edited ladder diagram program are stored in the storage unit. The arithmetic unit is configured to execute the ladder diagram editing program to edit the ladder diagram program, and store the ladder diagram program in the storage unit. The arithmetic unit is configured to allocate two-dimensional coordinates to a ladder diagram expressed by the ladder diagram program. The arithmetic unit is configured to detect two-dimensional coordinates and types of circuit elements included in the ladder diagram, and detect two-dimensional coordinates of any vertical connection lines included in the ladder diagram. The arithmetic unit is configured to store the circuit elements, the vertical connection lines, the two-dimensional coordinates of the circuit elements, and the two-dimensional coordinates of the vertical connection lines in the storage unit in association with each other.

A ladder display system includes: a first controller having a first ladder program; and a second controller having a second ladder program that performs input/output processing with the first ladder program. An input/output signal table generating unit generates an input/output signal table relating an input/output signal of the first ladder program to an input/output signal of the second ladder program. An external reference execution unit specifies a signal of the second ladder program and requests transmission of at least a part of the first ladder program. A ladder program output unit transmits at least a part of the first ladder program including a signal corresponding to the specified signal to the second controller. A ladder program display unit displays at least the part of the first ladder program output by the ladder program output unit on the second controller.

To provide a controller capable of facilitating changing of the order of robot cells, a control system, and a ladder program. A master PLC includes a master input unit that receives a first input signal indicating the order of operation of robot cells, and a second input signal indicating work completion in the robot cells from each of the plurality of robot cells; a master output unit that outputs an output signal for instruction of operation to the robot cell specified on the basis of combination of the first input signals, and the second input signal according to the ladder program; and a storage unit that stores a plurality of the ladder programs corresponding to a plurality of patterns of the order of operation comprising at least some of the plurality of robot cells.

In a facility operation analysis device configured to continuously grasp the extent of change (the amount of change) over time of actuators constituting a manufacturing facility, when displaying a result of evaluation on a display device, an evaluating portion compares a measured amount of change with thresholds of the amount of change that are set within a normal range where the manufacturing facility is not stopped, and displays the result of evaluation in which the measured amount of change is ranked.

A program development support unit includes an arithmetic unit and a storage unit. A ladder diagram editing program and an edited ladder diagram program are stored in the storage unit. The arithmetic unit is configured to execute the ladder diagram editing program to edit the ladder diagram program, and store the ladder diagram program in the storage unit. The arithmetic unit is configured to allocate two-dimensional coordinates to a ladder diagram expressed by the ladder diagram program. The arithmetic unit is configured to detect two-dimensional coordinates and types of circuit elements included in the ladder diagram, and detect two-dimensional coordinates of any vertical connection lines included in the ladder diagram. The arithmetic unit is configured to store the circuit elements, the vertical connection lines, the two-dimensional coordinates of the circuit elements, and the two-dimensional coordinates of the vertical connection lines in the storage unit in association with each other.

A numerical controller includes a programmable controller that performs input and output of a signal based on a ladder program and performs control of a machine based on an NC program. The numerical controller includes a first table associating the function used for control of the machine, an input signal, and an output signal and a second table associating the input signal, the output signal, and a signal in a dependent relation with the input signal and the output signal. Based on a function code of a function commanded by a block of the NC program that is preread, the numerical controller refers to the first and the second tables, identifies a signal to be subjected to automatic trace, and performs trace.

A ladder diagram monitoring device displays an operation situation of a ladder program executed on a programmable controller built in a CNC on a monitor. A comment added to a circuit of the ladder program is provided with a region for displaying information on an operation situation of the CNC, the operation situation of the ladder program is reflected in the region, and display data in which the operation situation of the CNC is displayed is displayed.

According to the invention, a ladder diagram program is stored with the data capacity suppressed. A program development supporting part 11 includes a calculation part 111 and a storage part 112. The storage part 112 stores a ladder diagram editing program 21 and a ladder diagram program that has been edited. The calculation part 111 executes the ladder diagram editing program 21 to edit the ladder diagram program and stores the ladder diagram program in the storage part 112. The calculation part 111 assigns two-dimensional coordinates to a ladder diagram represented by the ladder diagram program, detects two-dimensional coordinates and a type of a circuit element included in the ladder diagram and detects two-dimensional coordinates of a vertical connection line included in the ladder diagram, and stores the circuit element and the vertical connection line in association with the two-dimensional coordinates respectively in the storage part 112.