CHAPTER 4: INTERFACES LOGIC DIAGRAMSM60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4-2944.3 Logic diagramsLogic diagrams in this instruction manual provide an overview of function and settings. A logic diagram is based on• Inputs-on the left side, which are setting and operands• Logical gates, which is Boolean algebra to combine logical lines using AND, OR, NOT, and other gates to get a newlogical state• Logical operators, which are timers, one-shot operations, latches, and so on• Outputs-on the right side, which are products of the manipulations with inputs, logical gates, and logical operators toproduce new operands and define the output state of the elementTrue and false values are denoted by 1 and 0 respectively. A function usually is high/on/enabled when 1.Reading from right to left in the following diagram, the TRIP BUS 1 OP and TRIP BUS 1 PKP FlexLogic operands on the right sideare triggered when either the settings or reset latch in the middle of the diagram is triggered. When this applies, the TRIPBUS 1 OP operand is triggered after the delay set by the TRIP BUS 1 PICKUP DELAY or TRIP BUS 1 RESET DELAY setting, while theTRIP BUS 1 PKP operand initiates immediately. The settings or reset latch in the middle of the diagram is triggered as follows.• For the reset, one of three conditions are required to meet the OR requirement shown at the bottom left. That is, theTRIP BUS 1 LATCHING setting must be 0=Disabled (which is negated by the NOT function to become 1=Enabled), outputfrom the TRIP BUS 1 RESET FlexLogic operand must be 1, or output from the RESET OP FlexLogic operand must be 1.• For the settings, one of 16 input conditions at the top left must be met for the OR, the TRIP BUS 1 FUNCTION must beEnabled, and the TRIP BUS 1 BLOCK output must output as 0, which is then negated/reversed by NOT to become 1.Table 4-1: Logic diagram symbolsFigure 4-24: Logic diagramSymbol Description= Off Output from FlexLogic operand, so user-defined= Enabled 1 = Enabled and 0 = DisabledOR Any function input on the left side satisfies the conditionAND All functions input on the left side are required to satisfy the condition Not. Negates/reverses the output, for example 0 becomes 1. ConnectionS, R Set, ResetT PKP Timer pickup. Triggered by the settings latch in the diagram.T RST Timer reset. Triggered by the reset latch in the diagram.* * *SETTINGS= OffTRIP BUS 1 INPUT 2= OffTRIP BUS 1 INPUT 1= OffTRIP BUS 1 INPUT 16ORSETTINGS= EnabledTRIP BUS 1FUNCTION= OffTRIP BUS 1 BLOCK ANDANDLatchSRNon-volatile,set-dominantSETTINGS= EnabledTRIP BUS 1LATCHING= OffTRIP BUS 1 RESETFLEXLOGIC OPERANDTRIP BUS 1 PKPORSETTINGSTRIP BUS 1 PICKUPDELAYTRIP BUS 1 RESETDELAYT PKPT RSTFLEXLOGIC OPERANDRESET OPFLEXLOGIC OPERANDTRIP BUS 1 OP842023A1.CDR
