User manual OMRON CJ2 CPU UNIT SOFTWARE

[. . . ] W473-E1-07 SYSMAC CJ Series CJ2H-CPU6@-EIP CJ2H-CPU6@ CJ2M-CPU CJ2 CPU Unit Software USER'S MANUAL OMRON, 2008 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, or by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission of OMRON. No patent liability is assumed with respect to the use of the information contained herein. [. . . ] This is not possible for scheduled interrupt 1. Conditions for Setting the Minimum Time Interval for Scheduled Interrupt 0 to 0. 1 ms 1 High-speed interrupt function must be enabled. (Select the Enable high-speed interrupt function Option in the PLC Setup. ) If High-speed interrupt function is disabled, specifying 0. 1 ms in MSKS(690) will result in an instruction processing error. 2 Devices must not be directly connected to the peripheral port (USB) or serial port on the CPU Unit. A time interval of 0. 1 ms may not be stable if Support Software (e. g. , the CX-Programmer) or an NS-series Programmable Terminal is connected directly to the peripheral port (USB) or serial port on the CPU Unit. If a connection is required, make the connection using the built-in EtherNet/IP port (CJ2H-CPU6@-EIP only), or through the communications port of an EtherNet/IP Unit or a Serial Communications Unit. 10-20 CJ2 CPU Unit Software User's Manual 10 CPU Unit Functions 10-2 Cycle Time/High-speed Processing Precautions for Correct Use High-speed interrupt function improves execution of interrupt tasks under certain restrictions. Be sure to check the conditions for which use is possible before attempting operation. In particular, operation can be performed with the minimum time interval for scheduled interrupts set to 0. 1 ms only on the condition that Support Software (e. g. , the CX-Programmer) or an NS-series Programmable Terminal is not directly connected to the peripheral port (USB) or serial port on the CPU Unit. If a direction connection is made, operation may not be performed at a time interval of 0. 1 ms. If Support Software must be connected directly to the CPU Unit for maintenance of other reasons, confirm that equipment will not be affected if the schedule interrupt is not executed for a time interval of 0. 1 ms before making the connection. 10 10-2-6 High-speed Interrupt Function CJ2 CPU Unit Software User's Manual 10-21 10 CPU Unit Functions 10-3 Startup Settings and Maintenance 10-3-1 Holding Settings for Operating Mode Changes and at Startup Operating Mode Changes Starting Program Execution Turn ON the IOM Hold Bit (A500. 12) to retain all data in I/O memory when the CPU Unit is switched from PROGRAM mode to RUN/MONITOR mode to start program execution. I/O memory PROGRAM Retained CIO Area and other areas MONITOR or RUN Stopping Program Execution When the IOM Hold Bit (A500. 12) is ON, all data in I/O memory will also be retained when the CPU Unit is switched from RUN/MONITOR mode to PROGRAM mode to stop program execution. MONITOR or RUN Retained PROGRAM I/O memory CIO Area and other areas The following areas are held for the IOM Hold Bit: CIO Area (I/O Area, Data Link Area, CPU Bus Unit Area, Special I/O Unit Area, DeviceNet Area, and Internal I/O Area), Work Area, Timer Completion Flags, and Timer PVs. Auxiliary Area Flags and Words Name IOM Hold Bit Address A500. 12 Description When this bit is ON, all of the I/O memory will be retained when the operating mode is changed between PROGRAM and RUN/MONITOR mode or the power is turned ON. ON: I/O memory will be retained when the operating mode is changed. OFF: I/O memory will be cleared when the operating mode is changed. When the IOM Hold Bit is ON, all outputs from Output Units will be maintained when program execution stops. When the program starts again, outputs will have the same status that they had before the program was stopped. (When the IOM Hold Bit is OFF, instructions will be executed after the outputs have been cleared. ) 10-22 CJ2 CPU Unit Software User's Manual 10 CPU Unit Functions 10-3 Startup Settings and Maintenance PLC Power ON In order for all data in I/O memory to be retained when the PLC is turned ON, the IOM Hold Bit (A500. 12) must be ON and it must be protected in the PLC Setup. I/O memory Power ON Retained CIO Area and other areas 10 Auxiliary Area Flags and Words 10-3-1 Holding Settings for Operating Mode Changes and at Startup Name IOM Hold Bit Address A500. 12 Description When this bit is ON, all of I/O memory will be retained when the operating mode is changed between PROGRAM and RUN/MONITOR or the power is turned ON. ON: I/O memory will be retained when the operating mode is changed. OFF: I/O memory will be cleared when the operating mode is changed. PLC Setup When using the CX-Programmer, select the IOM Hold Bit Check Box in the Startup Hold Area on the Startup Tab Page to make the setting. CJ2 CPU Unit Software User's Manual 10-23 10 CPU Unit Functions 10-3-2 Power OFF Detection Delay Setting By default, an AC power interruption of 10 ms or longer (2 ms for a DC power interruption) will be detected about 10 to 25 ms (2 to 5 ms for DC power supplies) after the power supply voltage drops below 85% of the minimum rated value (80% for DC power supplies). There is a setting in the PLC Setup that can extend this time. When the power OFF interrupt task is enabled, it will be executed when the power interruption is confirmed, otherwise the CPU Unit will be reset and operation will be stopped. PLC Setup When using the CX-Programmer, make the setting in the Power Off detection time Field on the Timings/Synchronous Tab Page. Additional Information If you will not use the power OFF interrupt task, set the power OFF detection time to 10 ms or less as a measure for power interruptions. If the CJ1W-PD022 Power Supply Unit is used, however, a delay cannot be set, so use the default setting of 0 ms. 10-24 CJ2 CPU Unit Software User's Manual 10 CPU Unit Functions 10-3 Startup Settings and Maintenance 10-3-3 Disabling Power OFF Interrupts Areas of the program can be protected from power OFF interrupts so that they will be executed before the CPU Unit is reset even if the power supply is interrupted. This is achieved by using the DISABLE INTERRUPTS (DI(693)) and ENABLE INTERRUPTS (EI(694)) instructions. This function can be used with sets of instructions that must be executed as a group, e. g. , so that execution does not start with intermediate stored data the next time power is turned ON. 10 Procedure 10-3-3 Disabling Power OFF Interrupts 1 2 3 Set the Disable Setting for Power OFF Interrupts in A530 to A5A5 hex to enable disabling Power OFF Interrupts. Enable disabling Power OFF Interrupts in the PLC Setup (this is the default setting). Use DI(693) to disable interrupts before the program section to be protected and then use EI(694) to enable interrupts after the section. All instructions between DI(693) and EI(694) will be completed before the Power OFF Interrupt is executed even if the power interruption occurs while executing the instructions between DI(693) and EI(694). Execution condition DI Interrupts disabled. [. . . ] 5-103 User Program Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5 user-defined data type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-58 V variation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9 W Watch Cycle Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]