4-62 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUALLOGIC DIAGRAMS CHAPTER 4: INTERFACES48. When VERIFY NEW PASSWORD displays, re-type the password and press ENTER.9. When the NEW PASSWORD HAS BEEN STORED message appears, your new Setting (or Command) password is active.4.2.11 Invalid password entryBy default, when an incorrect Command or Setting password has been entered via the front panel three times within fiveminutes, the LOCAL ACCESS DENIED FlexLogic operand is set to “On” and the L30 does not allow settings or command levelaccess via the front panel for five minutes.By default, when an incorrect Command or Setting password has been entered via any external communications interfacethree times within five minutes, the REMOTE ACCESS DENIED FlexLogic operand is set to “ On ” and the L30 does not allowsettings or command access via the any external communications interface for five minutes. The REMOTE ACCESS DENIEDFlexLogic operand is set to “Off” after five minutes for a Command password or 30 minutes for a Settings password.These default settings can be changed in EnerVista under Settings > Product Setup > Security.4.3 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 4-2: Logic diagram symbolsCHANGE SETTINGPASSWORD: NoCHANGE SETTINGPASSWORD: YesENTER NEWPASSWORD: ##########VERIFY NEWPASSWORD: ##########NEW PASSWORDHAS BEEN STOREDSymbol 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
