CHAPTER 6: IEC 60870-5-104 INTEROPERABILITY
8 SERIES PROTECTIVE RELAY PLATFORM – COMMUNICATIONS GUIDE 6-3
Interoperability
This document is adapted from the IEC 60870-5-104 standard. For this section the boxes
indicate the following: ⊠ – used in the standard direction; □– not used.
IEC 60870-5-104 Interoperability Document
System or device:
□ System definition.
□ Controlling station definition (master).
⊠ Controlled station definition (slave).
Application layer:Transmission mode for application data:Mode 1 (least significant octet
first), as defined in Clause 4.10 of IEC 60870-5-4, is used exclusively in this companion
standard.Common address of ASDU:
⊠ Two octets.Information object address:
⊠ Three octets.
⊠ Structured
⊠ Unstructured
Cause of transmission:
⊠ Two octets (with originator address). Originator address is set to zero if not
used.Maximum length of APDU.253 in both directions (the maximum length is a fixed
system parameter).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 6-1: Process information in monitor 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
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