摘要:
The PLC communication system associated with the invention is characterized in that the system comprises a programmable logic controller (PLC), a plurality of processing devices (150, 250, 251-258), at least three communication processing nodes (41, 140, 240,241-248) provided at the PLC and at the plurality of processing devices respectively to establish communication of the PLC and each of the processing devices and an interconnecting device (HUB) and a plurality of communication lines (120, 220, 121-139, 221-236) for connecting the communication processing nodes with one another to establish data communication among the communication processing nodes. The PLC detects a state of communication failure and a display device displays an abnormal portion (114, 128, 230, 216) in a communication route based on the number of occurrences of the state of communication failure in respective interconnecting device and plurality of communication lines.
摘要:
The PLC communication system associated with the invention is characterized in that the system comprises a programmable logic controller (PLC), a plurality of processing devices (150, 250, 251-258), at least three communication processing nodes (41, 140, 240,241-248) provided at the PLC and at the plurality of processing devices respectively to establish communication of the PLC and each of the processing devices and an interconnecting device (HUB) and a plurality of communication lines (120, 220, 121-139, 221-236) for connecting the communication processing nodes with one another to establish data communication among the communication processing nodes. The PLC detects a state of communication failure and a display device displays an abnormal portion (114, 128, 230, 216) in a communication route based on the number of occurrences of the state of communication failure in respective interconnecting device and plurality of communication lines.
摘要:
A programmable logic controller capable of improving the expandability of a distributed control system and a programming tool for the programmable logic controller are provided. A programmable logic controller (PLC) that constitutes a distributed control system (1) includes: a variable table (Tb) that includes variable information including identification symbols for identification of a plurality of PLCs and variable names of reference variables, the variable information being set for each of the reference variables; a storage device (15) that has a memory region (Mn) for storing the reference variables; and an interface circuit (12) that mutually converts communication data for use in communication between the PLC and a different PLC and the reference variables stored in the memory region (Mn). The reference variables are variables mutually referenced by the plurality of PLCs.
摘要:
A block execution sequence display system includes: a machine tool (150) that has numerical control and sequence control; a programmable controller (10) that executes a sequence program (13a); a numerical control device (20) that executes a NC program (23a); block execution sequence array display means (116a) for displaying a block execution sequence array in which sequence functional blocks and a NC program execution block are arranged in an execution sequence; selecting means for selecting one of blocks in the array; and NC functional block execution sequence array display means (116c) for, when the NC program execution block is selected by the selecting means, displaying a NC functional block execution sequence array in which a plurality of NC functional blocks are arranged in an execution sequence.
摘要:
A programmable logic controller capable of improving the expandability of a distributed control system and a programming tool for the programmable logic controller are provided. A programmable logic controller (PLC) that constitutes a distributed control system (1) includes: a variable table (Tb) that includes variable information including identification symbols for identification of a plurality of PLCs and variable names of reference variables, the variable information being set for each of the reference variables; a storage device (15) that has a memory region (Mn) for storing the reference variables; and an interface circuit (12) that mutually converts communication data for use in communication between the PLC and a different PLC and the reference variables stored in the memory region (Mn). The reference variables are variables mutually referenced by the plurality of PLCs.
摘要:
A programmable logic controller capable of improving the expandability of a distributed control system and a programming tool for the programmable logic controller are provided. A programmable logic controller (PLC) that constitutes a distributed control system (1) includes: a variable table (Tb) that includes variable information including identification symbols for identification of a plurality of PLCs and variable names of reference variables, the variable information being set for each of the reference variables; a storage device (15) that has a memory region (Mn) for storing the reference variables; and an interface circuit (12) that mutually converts communication data for use in communication between the PLC and a different PLC and the reference variables stored in the memory region (Mn). The reference variables are variables mutually referenced by the plurality of PLCs.
摘要:
A screen definition device (30) includes a screen data generating unit (120) that outputs screen data (120a, 120b) generated by combining model screen data (210a, 210b) in which section information is set, with screen definition tables (111a, 111b) for the model screen data (210a, 210b); a screen data combining unit (130) that combines the screen data (120a) with the other screen data (120b) based on a reference relation indicated by link information of the screen data (120a) and the link information of the other screen data (120b); and a screen definition table setting unit (110) that sets screen definition tables (111a, 111b) in a table form.
摘要:
A block execution sequence display system includes: a machine tool (150) that has numerical control and sequence control; a programmable controller (10) that executes a sequence program (13a); a numerical control device (20) that executes a NC program (23a); block execution sequence array display means (116a) for displaying a block execution sequence array in which sequence functional blocks and a NC program execution block are arranged in an execution sequence; selecting means for selecting one of blocks in the array; and NC functional block execution sequence array display means (116c) for, when the NC program execution block is selected by the selecting means, displaying a NC functional block execution sequence array in which a plurality of NC functional blocks are arranged in an execution sequence.