CJ2 CPU Unit Software User's Manual - CIP ETI

6 I/O Memory Areas6-12 Temporary Relay AreaThe TR Area contains 16 bits with addresses ranging from TR0 to TR15. TR bits are useful when thereare several output branches and interlocks cannot be used.The TR bits can be used as many times as required and in any order required as long as the same TRbit is not used twice in the same instruction block.TR bits can be used only with the OUT and LD instructions. OUT instructions (OUT TR0 to OUT TR15)store the ON OFF status of a branch point and LD instructions recall the stored ON OFF status of thebranch point.TR bit status cannot be changed using the CX-Programmer. Application ExamplesIn this example, a TR bit is used when two outputs have been directly connected to a branch point.0.000.010.02 0.030.040.05InstructionLDOROUTANDOUTLDANDOUTOperand0.000.01TR 00.020.03TR 00.040.05In this example, a TR bit is used when an output is connected to a branch point without a separate executioncondition.66-12 Temporary Relay Area0.00 0.01 0.020.03InstructionLDOUTANDOUTLDOUTOperand0.00TR 00.010.02TR 00.03A TR bit is not required when there are no execution conditions after the branch point or there is an executioncondition only in the last line of the instruction block.0.00 0.010.02Instruction OperandLD 0.00OUTOUT0.010.020.000.020.010.03Instruction OperandLD 0.00OUT 0.01ANDOUT0.020.03CJ2 CPU Unit Software User’s Manual6-23