9-29.1 Use of Duplicated Output9.1.1 Duplicated OutputWhat is duplicated output?• Duplicated output refers to repeatedly specifying the same output in a sequence program.• If the same output is specified for the “OT” and “KP” instructions, it is considered to be duplicatedoutput.(Even if the same output is used for multiple instructions, such as the SET, RST instruction or high-level instruction (such as data transfer), it is not regarded as duplicated output.)• If you enter RUN mode while the duplicated output condition exists, it will be normally flagged as anerror. (The ERROR/ALARM LED will flash and the self-diagnostic error flag R9000 will go on.)How to check for duplicated useYou can check for duplicated outputs in the program using the programming tool, by the followingmethod.- Using the tool softwareSelect the “Debug” → “Totally Check Program” in the menu bar, and click “Execute”. If there are anyduplicated outputs, an error message and the address will be displayed.Enabling duplicated output• If you need to use output repeatedly due to the content of the program, duplicated output can beenalbed.• In this case, change the setting of system register 20 to “enable”.• When this is done, an error will not occur when the program is executed.9.1.2 When Output is Repeated with an OT, KP, SET or RST InstructionCondition of internal and output relays during operation• When instructions are repeatedly used which output to internal and output relays such as transferinstructions and OT, KP, SET and RST instructions, the contents are rewritten at each step duringoperation.Processing when SET, RST and OT instructions are used (X0 to X2 are all on).
