CHAPTER 3: IEC 61850 COMMUNICATION MODEL IMPLEMENTATION CONFORMANCE STATEMENT (MICS)UR FAMILY – COMMUNICATIONS GUIDE 3-593Table 3-46: Field ground protection stage 1 objectsTable 3-47: Field ground protection stage 2 objects3.5.2.25 Frequency rate of change (RteHz)This element is instantiated in the following products: D30, D60, F60, G30, G60, L30, L90, N60, T60.Table 3-48: Frequency rate of change data objectsLNName: FldGnd1PHIZ1 LDevice inst: Prot UR element: FIELD GROUND element stage 1 functionsdata obj. data attribute Type FC UR Name Description R/W/CStr ACD FIELD GND STG1 PKP operand Rgeneral BOOLEAN ST FIELD GND STG1 PKP RdirGeneral ENUMERATED ST 0, the code for unknown. It is unknown asthe element may be connected/configured to look forward or backwardROp ACT FIELD GND STG1 OP operand Rgeneral BOOLEAN ST FIELD GND STG1 OP RDpo SPS FIELD GND STG1 DPO operand RstVal BOOLEAN ST FIELD GND STG1 DPO RLNName: FldGnd2PHIZ1 LDevice inst: Prot UR element: FIELD GROUND element stage 2 functionsdata obj. data attribute Type FC UR Name Description R/W/CStr ACD FIELD GND STG2 PKP operand Rgeneral BOOLEAN ST FIELD GND STG2 PKP RdirGeneral ENUMERATED ST 0, the code for unknown. It is unknown asthe element may be connected/configured to look forward or backwardROp ACT FIELD GND STG2 OP operand Rgeneral BOOLEAN ST FIELD GND STG2 OP RDpo SPS FIELD GND STG2 DPO operand RstVal BOOLEAN ST FIELD GND STG2 DPO RLNName: RteHzPFRC# LDevice inst: Prot UR element: Frequency Rate of Change element #data obj. data attribute Type FC UR Name Description R/W/CStr ACD FREQ RATE # PKP operand, which isindicates Op will operate when delayexpires.Rgeneral BOOLEAN ST FREQ RATE # PKP RdirGeneral ENUMERATED ST 0, the code for unknown. ROp ACT FREQ RATE # OP operand Rgeneral BOOLEAN ST FREQ RATE # OP RDpo SPS FREQ RATE # DPO operand RstVal BOOLEAN ST FREQ RATE # DPO RHzChgRte MV FREQUENCY RATE OF CHANGE # in Hz/s RinstMag AnalogueValue MX RinstMag.f FLOAT32 FREQUENCY RATE OF CHANGE # RMag AnalogueValue MX Rmag.f FLOAT32 FREQUENCY RATE OF CHANGE #on deadband exceptionRunits Unit CF Runits.SIUint ENUMERATED 75, the code for Rate of change offrequency (Hz/s)Runits.multiplier ENUMERATED 0, the code for a multiplier of 1 Rdb INT32U CF RteHzPFRC#.HzChgRte.db R/W/CzeroDb INT32U CF 0 R