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Cat.No. W135–E1–3
SYSMAC
C200H-LK401/C500-LK009-V1
PC Link
SYSTEM MANUAL
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PC Link System Manual Revised March 2000
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Notice: OMRON products are manufactured for use according to proper procedures by a qualified operator and only for the purposes described in this manual. The following conventions are used to indicate and classify precautions in this manual. Always heed the information provided with them. Failure to heed precautions can result in injury to people or dam- age to property. ! DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. ! WARNING
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TABLE OF CONTENTS PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi 1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii 2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii 3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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About this Manual: A PC Link System enables use of the LR (Link Relay) data area as a common data area shared by all PCs in the PC Link System, thus simplifying programming, settings, and data exchange between PCs and per- mitting effective use of inputs and outputs. This manual has been written to provide the information necessary to design and install a single-level or multilevel PC Link System using PC Link Units with C500, C500F, C1000H, C2000, C2000H, C200H, C200HS, and/or C200HX/HG/HE(-Z)
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PRECAUTIONS This section provides general precautions for using the Programmable Controller (PC) and related devices. The information contained in this section is important for the safe and reliable application of the PC. You must read this section and understand the information contained before attempting to set up or operate a PC system. 1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii 2 General Prec
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Safety Precautions 3 1 Intended Audience This manual is intended for the following personnel, who must also have knowl- edge of electrical systems (an electrical engineer or the equivalent). • Personnel in charge of installing FA systems. • Personnel in charge of designing FA systems. • Personnel in charge of managing FA systems and facilities. 2 General Precautions The user must operate the product according to the performance specifications described in the operation manuals. Before using the
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Application Precautions 5 4 Operating Environment Precautions ! Caution Do not operate the control system in the following locations: • Locations subject to direct sunlight. • Locations subject to temperatures or humidity outside the range specified in the specifications. • Locations subject to condensation as the result of severe changes in tempera- ture. • Locations subject to corrosive or flammable gases. • Locations subject to dust (especially iron dust) or salts. • Locations subject to expo
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Safety Precautions 5 • Always use the power supply voltages specified in this manual. An incorrect voltage may result in malfunction or burning. • Take appropriate measures to ensure that the specified power with the rated voltage and frequency is supplied. Be particularly careful in places where the power supply is unstable. An incorrect power supply may result in malfunction. • Install external breakers and take other safety measures against short-circuit- ing in external wiring. Insufficient
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SECTION 1 Introduction 1-1 PC Link Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1-2 Operating Levels and Polling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1
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Operating Levels and Polling Section 1-2 1-1 PC Link Systems A PC Link System is established to interconnect two or more C-series PCs through PC Link Units to allow data transfer through the LR area of each PC. PC Link Subsystems can be established within the PC Link System, creating different levels of operation. Each PC in the PC Link System automatically exchanges data with all the PCs in the same Subsystem. Any PC in two Sub- systems (i.e., any PC to which two PC Link Units are mounted) can
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Operating Levels and Polling Section 1-2 A maximum of two PC Link Units can be mounted to the same PC. If two PC Link Units are mounted to one PC anywhere in the System, the System is multilevel, and all Units must be set for a Multilevel System (see 4-2-2 Switch Settings). In a Multilevel System, operating levels must be set to create PC Link Subsystems. Each Subsystem will have its own polling unit. Up to four Subsystems are possible. There will always be one more Subsys- tem than there are PC
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SECTION 2 System Design 2-1 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2-2 Using Link Adaptors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5
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System Configuration Section 2-1 2-1 System Configuration PC Link Units are mounted to the PC Racks and connected to each other. Each PC Link Unit contains a buffer through which data is transferred to and from the other PC Link Units connected to it. The C500-LK009-V1 can be used with C500, C1000H, and C2000H PCs, but not with a C200H, C200HS, or C200HX/HG/HE(-Z) PC. The C200H-LK401 can be used with C200H, C200HS, and C200HX/HG/HE(-Z) PCs. Link Adaptors are used in any System other than one con
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System Configuration Section 2-1 Note that a Link Adapter is not used in Subsystem 3. As explained above, it does not require any because it contains only two PCs. CPU Rack CPU Rack CPU Rack Subsystem 1 operating level 1 PC Link Unit PC Link Unit PC Link Unit CPU Rack CPU CPU CPU Link Link Link PC Link Unit Adapter Adapter Adapter PC Link Unit Link Link CPU Subsystem 3 Adapter Adapter operating level 1 CPU Rack CPU Rack CPU Rack PC Link Unit PC Link Unit PC Link Unit PC Link Unit CPU CPU CPU S
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System Configuration Section 2-1 Example 1 Single-level System C-series PC C-series PC C-series PC C-series PC Polled PC Polled PC Polled PC Polling PC Link Unit Link Unit Link Unit Link Unit Link Link Link Link Adaptor Adaptor Adaptor Adaptor Polled PC Polled PC Link Unit Link Unit C-series PC C-series PC Example 2 Two-level System C-series PC C-series PC Polled PC Polling PC Link Unit Link Unit Polling PC Link Link Unit Adapter Polled PC Link Link Unit Adapter C-series PC Polled PC Polled PC L
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System Configuration Section 2-1 System Limitations The maximum number of PCs that may be used in a PC Link System is lim- ited by the number of LR words available. This is determined by the number of levels, the specific PCs employed, and the mode settings on the PC Link Units. A PC Link Unit must be assigned a number no greater than one less than the maximum number of allowable PCs to be acknowledge as part of the Sys- tem. A PC Link Unit assigned a number greater than this limit will not be a
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Using Link Adaptors Section 2-2 2-2 Using Link Adaptors In a PC Link System, Link Adapters are used whenever more than two PC Link Units are connected in any one PC Link Subsystem. They are also used to enable optical links between PC Link Units to provide greater transmission distance and greater noise resistance. When using Link Adaptors, refer to the Link Adaptor Installation Guide. Optical Cable in PC Link A PC Link System can be set up to take advantage of optical communica- Systems tions b
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SECTION 3 Data Exchange and Operations 3-1 LR Area Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3-2 LR Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3-3 LR Area Division Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3-4 Data Exchange . . . . . . . . . . . . . . . . .
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LR Area Data Section 3-1 3-1 LR Area Data PC Link Systems employ the LR area in the exchange of data. The content of the LR areas in all PCs in the same PC Link Subsystem (or Single-level System) is kept consistent. To achieve this, the LR area is divided among all of the PCs in the Subsystem according to switch settings, and each PC writes data only to the part of the LR area allocated to it. When a PC writes to its LR area, the data is updated in the LR areas of all the other PCs in the PC Lin
