Compatibility of IEC 101 (interoperability)

This chapter contains the Interoperability appendix of the IEC standard. It has been reproduced verbatim and the various sections of the WinCC OA IEC driver are completed and filled out according to these specifications.

Standard

This application-based standard specifies sets of parameters and alternatives from which subsets must be selected for creating a single telecontrol system. Some parameters, such as the number of COMMON ASDU ADDRESS octets, are mutually exclusive. This means that only one quantity of the specified parameters is allowed per system. Other parameters, such as the listed sets with different process information in control and monitor direction, allow you to specify the total size or subsets required for the given application. The parameters of the above standard are combined in this section in order to allow suitable selection for a special application. If a system is made up of multiple system components from different manufacturers, it is necessary for all partners to agree to the selected parameters.

The boxes for the selected parameters should be checked.

Note

The complete specification of a system may also require individual selection of certain parameters for certain system components, e.g. individual selection of scaling factors for individually addressable readings.

Network configuration

(network-specific parameter)

Point-to-Point                     Multipoint

Multiple Point-to-Point       Multipoint Star

Physical layer

(network-specific parameter)

Transmission speed (control direction)

Unbalanced interchange circuit

V.24/V.28 Standard

Unbalanced interchange circuit

V.24/V.28

Recommended if > 1200 bits/s
 

Balanced interchange circuit

 X.24/X.27

100 bit/s

2400 bit/s

2400 bit/s

200 bit/s

4800 bit/s

4800 bit/s

300 bit/s

9600 bit/s

9600 bit/s

600 bit/s

19 200 bit/s

1200 bit/s

38 400 bit/s  

56000 bit/s

64000 bit/s

Transmission speed (monitor direction)

Unbalanced interchange circuit

V.24/V.28

Standard

Unbalanced interchange circuit

V.24/V.28

Recommended if > 1200 bits/s  

Balanced interchange circuit

 X.24/X.27

100 bit/s

2400 bit/s

2400 bit/s

200 bit/s

4800 bit/s

4800 bit/s

300 bit/s

9600 bit/s

9600 bit/s

600 bit/s

19 200 bit/s

1200 bit/s

38 400 bit/s  

56000 bit/s

64000 bit/s

Link layer

According to this application-specific standard, frame format FT 1.2, single character 1 and constant time monitoring interval are used exclusively in this companion standard.

Link transmission procedure

Address field of the link

Balanced transmission

Balanced transmission only

Unbalanced transmission

One Octet

Frame length

Two Octets

Maximum length L (number of
octets)

Structured

Unstructured

Application layer

Transmission mode for application data

Mode 1 (least significant octet first), as defined in Clause 4.10 of IEC 870-5-4, is used exclusively in this companion standard.

Common address of ASDU

(system-specific parameter)

One Octet

Two Octets

Information object address

(system-specific parameter; specifies all options used with "X")

One Octet

Structured  

Two Octets

Unstructured

Three Octets  

Cause of transmission

(system-specific parameter)

One Octet

Two Octets

Selection of standard ASDUs

Process information in monitor direction

(station-specific parameter)

<1>:= Single-point information

M_SP_NA_1

<2>:= Single-point information with time tag         

M_SP_TA_1

<3>:= Double-point information

M_SP_TA_1

<4>:= Double-point information with time tag  

M_DP_TA_1

<5>:= Step position information

M_ST_NA_1

<4>:= Step position information with time tag  

M_ST_TA_1

<7>:= Bitstring of 32 bits

M_BO_NA_1:

<8>:= Bitstring of 32 bits with time tag  

M_BO_TA_1

<9>:= Measured value, normalized value

M_ME_NA_1

<10>:= Measured value, normalized value with time tag

M_ME_TA_1

<11>:= Measured value, scaled value

M_ME_NB_1

<12>:= Measured value, scaled value with time tag

M_ME_TB_1

<13>:= Measured value, short floating point value

M_ME_NC_1

<14>:= Measured value, short floating point value with time tag

M_ME_TC_1

<15>:= Integrated totals

M_IT_NA_1

<16>:= Integrated totals with time tag  

M_IT_TA_1

<17>:= Event of protection equipment with time tag  

M_EP_TA_1

<18>:= Packed start events of protection equipment with time tag  

M_EP_TB_1

<19>:= Packed output circuit information of protection equipment with time tag

M_EP_TC_1

<20>:= Packed single-point information with status change detection

M_SP_NA_1

<21>:= Measured value, normalized value without quality descriptor

M_ME_ND_1

Note

The IEC 101 driver also supports frame types with long time stamps (e.g. type 34)!

Process information in control direction

(station-specific parameter)

<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

System information in monitor direction

(station-specific parameter)

<70>:= End of initialization

C_SC_NA_1

System information in control direction

(station-specific parameter)

<100>:= Interrogation command

C_IC_NA_1

<100> := Counter interrogation command

C_CI_NA_1

<102>:= Read command

C_RD_NA_1

<103> := Clock synchronization command

C_CS_NA_1

<104>:= Test command  

C_TS_NA_1

<105> := Reset process command

C_RP_NA_1

<106>:= Delay acquisition command

C_CD_NA_1

Parameter in control direction

(station-specific parameter)

<110>:= Parameter of measured value, normalized value

P_ME_NA_1

<111>:= Parameter of measured value, scaled value

P_ME_NB_1

<112>:= Parameter of measured value, short floating point value

P_ME_NC_1

<113>:= Parameter activation

P_AC_NA_1

File transfer

(station-specific parameter). Detailed information on the IEC file transfer functionality you will find in the IEC file transfer section of this documentation.

<120>:= File ready

F_FR_NA_1

<121>:= Section ready

F_SR_NA_1

<122>:= Call directory, select file, call file, call section

F_SC_NA_1

<123>:= Last section, last segment

F_LS_NA_1

<124>:= Ack file, ack section

F_AF_NA_1

<125>:= Segment

F_SG_NA_1

<126>:= Directory

F_DR_TA_1

Basic application functions

Station initialization

(station-specific parameter)

Remote initialization

Station interrogation

(system- or station-specific parameter)

Global

Group 1

Group 7

Group 13

Group 2

Group 8

Group 14

Group 3

Group 9

Group 15

Group 4

Group 10

Group 16

Group 5

Group 11

Specify addresses per group

Group 6

Group 12

Clock synchronization

(station-specific parameter; "X" if used in standard direction or "R" if used in reverse direction or "B" if used in both directions)

Clock synchronization

Command transmission

(object-specific parameter)

Direct command transmission

Direct setpoint command transmission

Select and execute command

Select and execute setpoint command

C_SE ACTTERM used

No additional definition

Short pulse duration (duration determined by system parameter in the outstation.)

Long pulse duration (duration determined by system parameter in the outstation.)

Persistent output

Transmission of integrated totals

(station- or object-specific parameter)

Counter request

General request counter

Counter freeze without reset

Request counter group 1

Counter freeze with reset

Request counter group 2

Counter reset

Request counter group 3

Specify addresses per group

Request counter group 4

Parameter loading

(object-specific parameter)

Threshold value

Smoothing factor

Low limit for transmission of measured values

High limit for transmission of measured values

Parameter activation

(object-specific parameter)

Activation/deactivation of persistent cyclic or periodic transmission of the addressed object