the Main menu/Test/Function status/Function group/Function block descriptive name/LNname/Outputs.• When theBeh of a function block is set toTest, the function block is not blocked and allcontrol commands with a test bit are accepted.• When theBeh of a function block is set toTest/blocked, all control commands with a testbit are accepted. Outputs to the process via a non-IEC 61850 link data are blocked by thefunction block. Only process-related outputs on function blocks related to primaryequipment are blocked. If there is an XCBR function block used, the outputsEXC_OpenandEXC_Close are blocked.• When theBeh of a function block is set toBlocked, all control commands with a test bitare accepted. Outputs to the process via a non-IEC 61850 link data are blocked by thefunction block. In addition, the function block can be blocked when theirBeh isblocked.This can be done if the function block has a block input.The block status of a component is shown on the LHMI as theBlk output under the same pathas forBeh:Main menu/Test/Function status/Function group/Function block descriptivename/LN name/Outputs. If theBlk output is not shown, the component cannot be blocked.21.12.2 Setting guidelines M15260-3 v7Remember always that there are two possible ways to place the IED in theTestMode=On”state. If, the IED is set to normal operation (TestMode =Off), but the functions are still shownbeing in the test mode, the input signal IED_TEST on the TESTMODE function block isactivated in the configuration.Forcing of binary input and output signals is only possible when the IED is in IED test mode.21.13 Time synchronization IP1750-1 v121.13.1 Application M11345-3 v9Use time synchronization to achieve a common time base for the IEDs in a protection andcontrol system. This makes it possible to compare events and disturbance data between allIEDs in the system. If a global common source (i.e. GPS) is used in different substations for thetime synchronization, also comparisons and analysis between recordings made at differentlocations can be easily performed and a more accurate view of the actual sequence of eventscan be obtained.Time-tagging of internal events and disturbances are an excellent help when evaluating faults.Without time synchronization, only the events within one IED can be compared with eachother. With time synchronization, events and disturbances within the whole network, can becompared and evaluated.In the IED, the internal time can be synchronized from the following sources:• BIN (Binary Minute Pulse)• DNP• GPS• IEC103• SNTP• IRIG-B• SPA• LON• PPS1MRK 511 358-UEN A Section 21Basic IED functions453Application manual
