CPM2A_OPERATION MANUAL (W352-E1-3) (986749), страница 3
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Leaving the label attached may result in malfunction.• Be sure to perform wiring in accordance with the relevant operation manual.Incorrect wiring may result in burning.• Use crimp terminals for wiring. Do not connect bare stranded wires directly toterminals.
Connection of bare stranded wires may result in burning.xiv6EC Directives• Double-check all the wiring before turning ON the power supply. Incorrect wiring may result in burning.• Be sure that the terminal blocks, Memory Units, expansion cables, and otheritems with locking devices are properly locked into place. Improper lockingmay result in malfunction.• Be sure that terminal blocks and connectors are connected in the specified direction with the correct polarity. Not doing so may result in malfunction.• Check the user program for proper execution before actually running it on theUnit.
Not checking the program may result in an unexpected operation.• Confirm that no adverse effect will occur in the system before attempting any ofthe following. Not doing so may result in an unexpected operation.• Changing the operating mode of the PC.• Force-setting/force-resetting any bit in memory.• Changing the present value of any word or any set value in memory.• Resume operation only after transferring to the new CPU Unit the contents ofthe DM and HR Areas required for resuming operation.
Not doing so may resultin an unexpected operation.• Do not pull on the cables or bend the cables beyond their natural limit. Doingeither of these may break the cables.• Do not place objects on top of the cables. Doing so may break the cables.• Under no circumstances should batteries be short-circuited between positive(+) and negative (–) terminals, charged, disassembled, heated, or thrown intofire.• When replacing parts, be sure to confirm that the rating of a new part is correct.Not doing so may result in malfunction or burning.• Before touching the Unit, be sure to first touch a grounded metallic object inorder to discharge any static build-up.
Not doing so may result in malfunction ordamage.• Do not touch the expansion I/O connecting cable while the power is being supplied in order to prevent any malfunction due to static electricity.• When using a thermocouple-input type Temperature Sensor Unit, observe thefollowing precautions:• Do not remove the cold junction compensator attached at the time of delivery. If the cold junction compensator is removed the Unit will not be able tomeasure temperatures correctly.• Each of the input circuits is calibrated with the cold junction compensatorattached to the Unit.
If the Unit is used with the cold junction compensatorfrom other Units, the Unit will not be able to measure temperatures correctly.• Do not touch the cold junction compensator. Doing so may result in incorrect temperature measurement.6EC Directives6-1Applicable Directives• EMC Directives• Low Voltage Directive6-2ConceptsEMC DirectivesOMRON devices that comply with EC Directives also conform to the relatedxv6EC DirectivesEMC standards so that they can be more easily built into other devices or theoverall machine. The actual products have been checked for conformity to EMCstandards (see the following note). Whether the products conform to the standards in the system used by the customer, however, must be checked by thecustomer.EMC-related performance of the OMRON devices that comply with EC Directives will vary depending on the configuration, wiring, and other conditions of theequipment or control panel on which the OMRON devices are installed.
The customer must, therefore, perform the final check to confirm that devices and theoverall machine conform to EMC standards.Note Applicable EMC (Electromagnetic Compatibility) standards are as follows:EMS (Electromagnetic Susceptibility): EN61131-2EMI (Electromagnetic Interference):EN50081-2(Radiated emission: 10-m regulations)Low Voltage DirectiveAlways ensure that devices operating at voltages of 50 to 1,000 VAC and 75 to1,500 VDC meet the required safety standards for the PC (EN61131-2).6-3Conformance to EC DirectivesThe CPM2A PCs comply with EC Directives.
To ensure that the machine or device in which the CPM2A PC is used complies with EC directives, the PC must beinstalled as follows:1, 2, 3...1. The CPM2A PC must be installed within a control panel.2. Reinforced insulation or double insulation must be used for the DC powersupplies used for the communications and I/O power supplies.3. CPM2A PCs complying with EC Directives also conform to the CommonEmission Standard (EN50081-2).
Radiated emission characteristics (10-mregulations) may vary depending on the configuration of the control panelused, other devices connected to the control panel, wiring, and other conditions. You must therefore confirm that the overall machine or equipmentcomplies with EC Directives.6-4Relay Output Noise Reduction MethodsThe CPM2A PCs conform to the Common Emission Standards (EN50081-2) ofthe EMC Directives.
However, the noise generated when the PC is switched ONor OFF using the relay output may not satisfy these standards. In such a case, anoise filter must be connected to the load side or other appropriate countermeasures must be provided external to the PC.Countermeasures taken to satisfy the standards vary depending on the deviceson the load side, wiring, configuration of machines, etc. Following are examplesof countermeasures for reducing the generated noise.Countermeasures(Refer to EN50081-2 for more details.)Countermeasures are not required if the frequency of load switching for thewhole system with the PC included is less than 5 times per minute.Countermeasures are required if the frequency of load switching for the wholesystem with the PC included is 5 times or more per minute.xvi6EC DirectivesCountermeasure ExamplesWhen switching an inductive load, connect a surge protector, diodes, etc., in parallel with the load or contact as shown below.CircuitCurrentACPowersupplyYesYesInductiveloadCR methodCharacteristicRequired elementIf the load is a relay or solenoid, thereis a time lag between the moment thecircuit is opened and the moment theload is reset.The capacitance of the capacitor mustbe 1 to 0.5 µF per contact current of1 A and resistance of the resistor mustbe 0.5 to 1 Ω per contact voltage of1 V.
These values, however, vary withthe load and the characteristics of therelay. Decide these values fromexperiments, and take intoconsideration that the capacitancesuppresses spark discharge when thecontacts are separated and theresistance limits the current that flowsinto the load when the circuit is closedagain.DCIf the supply voltage is 24 to 48 V,insert the surge protector in parallelwith the load. If the supply voltage is100 to 200 V, insert the surgeprotector between the contacts.The dielectric strength of the capacitormust be 200 to 300 V. If the circuit isan AC circuit, use a capacitor with nopolarity.PowersupplyNoYesInductiveloadVaristor methodPowersupplyYesInductiveloadDiode methodYesThe diode connected in parallel withthe load changes energy accumulatedby the coil into a current, which thenflows into the coil so that the currentwill be converted into Joule heat bythe resistance of the inductive load.The reversed dielectric strength valueof the diode must be at least 10 timesas large as the circuit voltage value.The forward current of the diode mustbe the same as or larger than the loadcurrent.This time lag, between the momentthe circuit is opened and the momentthe load is reset, caused by thismethod is longer than that caused bythe CR method.The reversed dielectric strength valueof the diode may be two to three timeslarger than the supply voltage if thesurge protector is applied to electroniccircuits with low circuit voltages.The varistor method prevents theimposition of high voltage between thecontacts by using the constant voltagecharacteristic of the varistor.
There istime lag between the moment thecircuit is opened and the moment theload is reset.---If the supply voltage is 24 to 48 V,insert the varistor in parallel with theload. If the supply voltage is 100 to200 V, insert the varistor between thecontacts.xvii6EC Directives6-5CPM1A-MAD01 Conformance to EMC DirectivesImmunity testing conditions when using the current I/O of the CPM1A-MAD01are as follows.• Total accuracy: +10%/-1%• Insert the following core in each line as shown below.Recommended core: 2643-002402Manufacturer: Fair Rite Products Corp.xviiiSECTION 1IntroductionThis section describes the CPM2A’s special features and functions, shows the possible system configurations, and outlines thesteps required before operation. Read this section first when using the CPM2A for the first time.Refer to the CPM1/CPM1A/CPM2A/CPM2C/SRM1(-V2) Programming Manual (W353) for details on programming operation.1-11-21-31-41-51-6CPM2A Features and Functions .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1-1 CPM2A Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1-2 Overview of CPM2A Functions . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Basic System Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2-1 Stand-alone CPU Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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