GE 350

CHAPTER 3: ETHERNET INTERFACE IEC60870-5-104 PROTOCOL
SR3 SERIES PROTECTIVE RELAY PLATFORM – COMMUNICATIONS GUIDE 3-23
⊠ Three octets.
⊠ Structured
⊠ Unstructured
2.4. Cause of transmission:
⊠ Two octets (with originator address). Originator address is set to zero if not used.
2.5. Maximum length of APDU.
253 in both directions (the maximum length is a fixed system parameter).
2.6. Selection of standard ASDUs.
For the following lists, the boxes indicate the following: ⊠ – used in standard
direction; □ – not used.
Process information in monitor direction:
Table 3-3: Process information in monitor direction
Either the ASDUs of the set <2>, <4>, <6>, <8>, <10>, <12>, <14>, <16>, <17>, <18>,
and <19> or of the set <30> to <40> are used.
Table 3-4: Process information in control direction
Number / description Mnemonic
⊠ <1> := Single-point information M_SP_NA_1
□ <3> := Double-point information M_DP_NA_1
□ <5> := Step position information M_ST_NA_1
□ <7> := Bitstring of 32 bits M_BO_NA_1
□ <9> := Measured value, normalized value M_ME_NA_1
⊠ <11> := Measured value, scaled value M_ME_NB_1
□ <13> := Measured value, short floating point value M_ME_NC_1
⊠ <15> := Integrated totals M_IT_NA_1
□ <20> := Packed single-point information with status change detection M_SP_NA_1
□ <21> := Measured value, normalized value without quantity descriptor M_ME_ND_1
⊠ <30> := Single-point information with time tag CP56Time2a M_SP_TB_1
□ <31> := Double-point information with time tag CP56Time2a M_DP_TB_1
□ <32> := Step position information with time tag CP56Time2a M_ST_TB_1
□ <33> := Bitstring of 32 bits with time tag CP56Time2a M_BO_TB_1
□ <34> := Measured value, normalized value with time tag CP56Time2a M_ME_TD_1
⊠ <35> := Measured value, scaled value with time tag CP56Time2a M_ME_TE_1
□ <36> := Measured value, short floating point value with time tag CP56Time2a M_ME_TF_1
⊠ <37> := Integrated totals with time tag CP56Time2a M_IT_TB_1
□ <38> := Event of protection equipment with time tag CP56Time2a M_EP_TD_1
□ <39> := Packed start events of protection equipment with time tag
CP56Time2a
M_EP_TE_1
□ <40> := Packed output circuit information of protection equipment with time
tag CP56Time2a
M_EP_TF_1
Number / description Mnemonic
⊠ <45> := Single command C_SC_NA_1
⊠ <46> := Double command C_DC_NA_1
□ <47> := Regulating step command C_RC_NA_1
□ <48> := Set point command, normalized value C_SE_NA_1
□ <49> := Set point command, scaled value C_SE_NB_1
□ <50> := Set point command, short floating point value C_SE_NC_1
□ <51> := Bitstring of 32 bits C_BO_NA_1