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  • standard IEC 60870-5-101:2003 in modes both "unbalanced" (master and slave) and "balanced" modes,
  • redundancy of communication lines according to the so-called Norwegian convention (Norwegian IEC 870-5-101 User Conventions).

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Kotva
komunikacna_linka
komunikacna_linka
Communication line configuration

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Line categories:

Implementation is, according to the IEC870-5-101 standard, as follows:

  • Originator The originator ASDU address is not present.
  • ASDU address is 1 byte, it is defined as the station address. ASDU addresses of all stations on one line must be different.
  • Cause The cause of transmission is 1 byte (does not contain the Originator ASDU address).
  • Information The information object address is 2 bytes, it is defined as an I/O tag address.

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If you require the system-redundant communication, use the line category SerialOverUDP SerialOverUDP System&Line Redundant or Serial System&Line Redundant line categories. Providing that, this communication should be also network redundant, enter "Secondary line" for both "A System" and "B System". This configuration then works in such a way that it concurrently sends and receives data from two systems and each is network-redundantly connected in compliance with the so-called Norwegian convention (Norwegian IEC 870-5-101 User Conventions).

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  • Communication protocol "IEC 870-5-101 balanced", "IEC 870-5-101 unbalanced primary (Master)" or "IEC 870-5-101 unbalanced secondary (Slave)".
  • Station The station address is a decimal number in the range 0 - 255 and is used in the protocol as the ASDU address. It can be specified as a decimal number or as a hexadecimal number with a hash at the beginning (e.g. #0A).
  • The synchronization of the station realThe synchronization of the station real-time may be enabled also for the protocols "master" and "balanced - station A (controlling)". Set the synchronization period to a nonzero value. The synchronization is executed by ASDU 103 "Clock synchronization command" in the local time according to settings of the D2000 System.

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The Browse button opens a browsing dialog for the station address. If the communication is functional, a dialog with the ASDU addresses received so far is displayed. The Refresh button can be used to clear the list of received ASDU addresses.

Image Added

Kotva
linka_parametre
linka_parametre
Line protocol parameters

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Configuration dialog box - tab Protocol parameters.
They

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Configuration dialog box - tab Protocol parameters.
They influence some optional parameters of the protocol. Following The following station protocol parameters can be set:

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Send Confirmation CommandAccept Confirmation CommandMax. MTULimitation of data packet size (only slave, balanced).Phys. Trans. DirectionInterrog. Covers CountersSend the call 100 and counter values on general interrogation (only slave, balanced).Send Interrog. in Sec. Direct.Send general interrogation command in case of slave or balanced controlled station B (only slave, balanced).srmastSystem Redundancy: Manages A Status AddressFull Debug
Parameter


Meaning


Unit


Default value


Kotva
la
la
Link Address
Common link address.-1
Kotva
lasdu
lasdu
Length of ASDU Address
Length of ASDU address.1/2 byte(s)1
Kotva
lla
lla
Length of Link Address
Length of common link address.1/2 byte(s)1
Kotva
lioa
lioa
Length of Info Object Address
Length of info object address.1/2/3 byte(s)2
Kotva
lcot
lcot
Length of Cause Of Transmission
Length of "Cause Of Transmission".1/2 byte(s)1
Kotva
rc
rc
Retry Count
Delay The delay between request retry in case of a communication failure.-2
Kotva
rt
rt
Retry Timeout
Delay The delay between retry of call in case of a communication error.ms100 millisecond
Kotva
wft
wft
Wait First Timeout
Delay after sending the request before reading the response.ms100 millisecond
Kotva
wt
wt
Wait Timeout
Delay between response readings till its completinguntil it is completed.ms500 millisecond
Kotva
mwr
mwr
Max. Wait Retry
Retry count of response reading till its completinguntil it is completed.-6
Kotva
ndt
ndt
No Data Timeout
Delay of next call "Request user data class 1/2" if no data have been received (only master).ms300 millisecond
Kotva
it
it
Inactivity Timeout
Interval of connection monitoring. If no valid data have not been received, station status will pass go to a communication error. Switching of redundant devices in case of SerialOverUDP Device Redundant line (only slave).ms5 sec.
Kotva
mt
mt
Moxa Timeout
Interval of The switching interval of the redundant devices MOXA NPort in case of communication error (only master, balanced).sec.10
Kotva
sf
sf
Source Flags
Set flags FI..FL according to the source of line. If SerialOverUDP System+Line Redundant is used, the values will have these flags:
  • System A, primary line: FI
  • System A, secondary line: FJ
  • System B, primary line: FK
  • System B, secondary line: FL

Note: Flag was used in communication with redundant systems to distinguish the wrong values that were sent by a partner system, which was supposed to be passive and not to send nothing.
-NO
Kotva
nf
nf
No Output Flags
Activation of parameter results in ignoring of flags FA..FH for output I/O tags. If this parameter is turned off, flags FA..FH are mapped to individual bits of quality byte.-NO
Kotva
ltt
ltt
Link Test Timeout
Interval of request sending "Test function for link" if timeout elapsed and no data telegrams was were transferred (only balancedbalanced only).sec.10

Kotva
sv
sv
Single Value In Spontaneous Answer

When sending spontaneous changes, these will be sent one-per-ASDU and they will not be cumulated into longer packets. Parameter The parameter was implemented to handle a bug in a particular TM1703mic.-NO

Kotva
dc
dc
Data Class

Class The class used for sending data (slave only slave). IEC 101 Master sends Class1 (high priority) and Class2 (normal) read data requests. Slave responds to them with data or a message that it has no data. In both Class1 and Class2 response  responses there is an ACD flag that the slave has Class1 data available. If set, the IEC 101 Master will then request Class1 data.

The parameter affects behavior as follows:

  • Class1&2 - IEC 101 Slave responds to Class1 and Class2 requests with data. The ACD flag sets if it has additional data.
  • Class1 - IEC 101 Slave sends all data as Class1 and responds to the Class2 requests that it has no data. The ACD flag sets if it has additional data.
  • Class2 - IEC 101 Slave sends all data as Class2 and responds to the Class1 requests that it has no data. The ACD flag sets to 0 (it does not have Class1 data).

The default value of the parameter is Class1.

Class1&2
Class1
Class2
Kotva
  • Prio reply - IEC 101 Slave sends responses to command ASDUs as Class1 data and other ASDUs (value changes, responses to Interrogation) as Class2.
    Note: The responses to Interrogation (ASDU 100) and Counter Interrogation (ASDU 101) commands and all the values sent as a part of the response are also sent as Class1 data.

The default value of the parameter is Class1.

-Class1&2
Class1
Class2
Prio reply

Kotva
sr
sr
Single Request

Discard received data before sending a response (only slave). If a correct request is received and the IEC 101 Slave wants to send a response, it will clear the incoming queue before sending, if the queue has data in it. This parameter serves as a protection against various data duplications due to communication partner errors (e.g. OSI Monarch with RtuPing running during switching of active communication line).-NO
Kotva
cmdc
cmdc
Send Confirmation Command
Type of sent confirmation to write value cmdccmdcType of sent confirmation to write value (only slave, balanced).-
7(CONF)
10(TERM)
7(CONF) and 10(TERM)
7(CONF)
Kotva
accaccType of record confirmation to be accepted successfully (only master, balanced).-
7(CONF)
10(TERM)
7(CONF) or 10(TERM)
7(CONF) or 10(TERM)
Kotva
mtumtubytes220
Kotva
dirab-
7(CONF)
10(TERM)
7(CONF) and 10(TERM)
7(CONFdirabSetting a bit DIR in balance mode (only balanced).Station A(Controlling)
Station B(Controlled)
Station A(Controlling)
Kotva
sbackaccsback
Single Byte Ack
Send single-byte ACK preferentially (0xE5).YES/NONO
acc
Accept Confirmation Command
Type of record confirmation to be accepted successfully (only master, balanced).-
7(CONF)
10(TERM)
7(CONF) or 10(TERM)
7(CONF) or 10(TERM)
Kotva
mtu
mtu
Max. MTU
Limitation of data packet size
Kotva
icciicciYES/NObytesYES220
Kotva
seoidirabseoi
Send EOI
dirab
Phys. Trans. Direction
Setting a bit DIR in balance mode (only balanced).Station A(Controlling)
Station B(Controlled)
Station A(Controlling)
Kotva
sback
sback
Single Byte Ack
Send single-byte ACK preferentially (0xE5).YES/NONO
Kotva
icci
icci
Interrog. Covers Counters
Send the call 100 and counter values on general interrogation Send "end of interrogation command" to all ASDU (only slave).YES/NOYES
Kotva
sisdsisdYES/NONOYES
Kotva
sm
seoi
sm
seoi
Sinaut ModeSend EOI
Send "end of interrogation command" to all ASDU (only slaveCommunication for system Sinaut Spectrum, which requires non-standard behavior on redundant lines (different from the Norwegian convention).YES/NONOYES
Kotva
sisd
srmast-
Kotva
fdfdHigh level of communication tracking, the loaded values of I/O tags and other debug information are shown.YES/NONO

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sisd
Send Interrog. in Sec. Direct.
Send general interrogation command in case of slave or balanced controlled station B (only slave, balanced).YES/NONO

Kotva
sm
sm
Sinaut Mode

Communication for system Sinaut Spectrum, which requires non-standard behavior on redundant lines (different from the Norwegian convention).YES/NONO

Kotva
srmast
srmast
System Redundancy: Manages A Status Address

-
Kotva
fd
fd
Full Debug
A high level of communication tracking, the received values of I/O tags and other debug information is shown.YES/NONO

Kotva
merany_bod
merany_bod
I/O tag configuration

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Possible value types of I/O tags: Ai, Ao, Di, Dout, Ci, Co, Qi

I/O tag address is a numerical address of data object IOA (in range 0 - 65535).
The I/O tag with an address starting with %IGNORE will be ignored.

In the case of command direction in master or balanced mode is necessary to configure a proper ASDU type:

ASDU typeI/O Tag type
45 - Single commandDout
46 - Double commandDout, Co
47 - Regulating step commandDout
48 - Set point command, normalised valueAo
49 - Set point command, scaled valueCo
50

Possible value types of I/O tags: Ai, Ao, Di, Dout, Ci, Co, Qi

I/O tag address is numerical address of data object IOA (in range 0 - 65535).

In case of command direction in master or balanced mode is necessary to configure je proper ASDU type:

ASDU typeI/O Tag type
45 - Single commandDout
46 - Double commandDout, Co
47 - Regulating step commandDout
48 - Set point command, normalised valueAo
49 - Set point command, scaled valueCo
50 - Set point command, short floating point valueAo
51 - Bitstring of 32 bitCo
58 - Single command with time tag CP56Time2aDout
59 - Double command with time tag CP56Time2aDout, Co
60 - Regulating step command with time tag CP56Time2aDout
61 - Set point command, normalised value with time tag CP56Time2aAo
62 - Set point command, scaled value with time tag CP56Time2aCo
63 - Set point command, short floating point value with time tag CP56Time2a Ao
64 51 - Bitstring of 32 bitCo
58 - Single command with time tag CP56Time2aDout
59 - Double command with time tag CP56Time2aCo

In case of slave or balanced mode je is necessary to configure je proper ASDU type in v data direction:

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Dout, Co
60 - Regulating step command with time tag CP56Time2aDout
61 - Set point command, normalised value with time tag CP56Time2aAo
62 - Set point command, scaled value with time tag CP56Time2aCo
63 - Set point command, short floating point value with time tag CP56Time2a Ao
64 - Bitstring of 32 bit with time tag CP56Time2aCo

In case of slave or balanced mode je is necessary to configure je proper ASDU type in v data direction:

ASDU typeI/O Tag type
1 - Single-point informationDi, Qi (On/Off), Ai, Ci
2 - Single-point information with time tagDi, Qi (On/Off), Ai, Ci
3 - Double-point informationQi, Ai, Ci
4 - Double-point information with time tagQi, Ai, Ci
5 - Step position informationCi, Ai *
6 - Step position information with time tagCi, Ai *
7 - Bitstring of 32 bitsCi, Ai
8 - Bitstring of 32 bits with time tagCi, Ai
9 - Measured value, normalized valueAi
10 - Measured value, normalized value with time tagAi
11 - Measured value, scaled valueCi, Ai
12 - Measured value, scaled value with time tagCi, Ai
13 - Measured value, short floating point valueAi
14 - Measured value, short floating point value with time tagAi
15 - Integrated totalsCi, Ai
16 - Integrated totals with time tagCi, Ai
17 - Event of protection equipment with time tagCi, Ai, TiR **
18 - Packed start events of protection equipment with time tagCi, Ai, TiR ***
20 - Packed single-point information with status change detectionCi, Ai
21 - Measured value, normalized value without quality descriptorAi
30 - Single-point information with time tag CP56Time2aDi, Qi (On/Off), Ai, Ci
31 - Double-point information with CP56Time2a tagQi, Ai, Ci
32 - Step position information with CP56Time2a tagCi, Ai *
33 - Bitstring of 32 bits with CP56Time2a tagCi, Ai
34 - Measured value, normalized value with CP56Time2a tagAi
35 - Measured value, scaled value with CP56Time2a tagCi, Ai
36 - Measured value, short floating point value with time tag CP56Time2aAi
37 - Integrated totals with time tag CP56Time2aCi, Ai
38 - Event of protection equipment with time tag CP56Time2aCi, Ai, TiR **
39 - Packed start events of protection equipment with time tag CP56Time2aCi, Ai, TiR ***
40 - Packed output circuit information of protection equipment with time tag CP56Time2aCi, Ai, TiR ***

Kotva
poz1
poz1
Note 1: Individual bits of a quality byte (SIQ for ASDU 1,2,30; DIQ for ASDU 3,4,31; QDS for 5-14,20,32-36) set the attributes FLA ( Kotvapoz1poz1Note 1: Individual bits of bytes which determines a quality (SIQ for ASDU 1,2,30; DIQ for ASDU 3,4,31; QDS for 5-14,20,32-36) set the attributes FLA (0.bit), FLB (1.bit) ..FLH (7.bit).
Example:
for ASDU 4: FLA=DPI bit 0, FLB=DPI bit 1, FLC=0, FLD=0, FLE=BL bit, FLF=SB bit, FLG=NT bit, FLH=IV bit.
for ASDU 16: FLA..FLE Sequence number bity bits 0..4, FLF=CY bit, FLG=CA bit, FLH=IV bit
And
Moreover:

  • if bit IV (Invalid) is set, the status of value will be Invalid
  • if one of bits the NT (Not topical), SB (Substituted), BL (Blocked), OV (Overflow), CA (Counter adjusted), or CY (Counter overflow) is set for proper bits are set in their respective ASDU types, the status of value will be Weak.

Kotva
pozn1
pozn1
* - T-bit from the value of ASDU sets the attribute FI into the value of I/O tag which has value type Ci/Ai and they are interpreted as figures numbers -64 up-to +63.

Kotva
pozn2
pozn2
** - ASDU 17 and 38: the value of SEP byte SEP sets the attributes FLA (0.bit), FLB (1.bit) up-to FLH (7.bit), following 2 bytes (CP16Time2a) are interpreted as a positive number (0-60 000) into the value of I/O tag with value type Ci/Ai or as relative time (0-60 seconds) into value of I/O tag with value type TiR. Kotvapozn3pozn3*** - ASDU 18, 39 and 40: value of byte SPE(ASDU 18,39) or OCI (ASDU 40) sets the attributes FLI (0.bit), FLJ (1.bit) up-to FLP (7.bit). Value of byte QDP sets the attributes FLA (0.bit), FLB (1.bit) up-to FLH (7.bit), following 2 bytes (CP16Time2a) are interpreted as positive number (0-60 000) into value of I/O tag with value type Ci/Ai or as relative time (0-60 seconds) into value of I/O tag with value type TiR.a relative time (0-60 seconds) into the value of I/O tag with TiR value type.

Kotva
pozn3
pozn3
*** - ASDU 18, 39 and 40: value of SPE(ASDU 18,39) or OCI (ASDU 40) byte sets the attributes FLI (0.bit), FLJ (1.bit) up-to FLP (7.bit). The value of byte QDP sets the attributes FLA (0.bit), FLB (1.bit) up-to FLH (7.bit), following 2 bytes (CP16Time2a) are interpreted as a positive number (0-60 000) into the value of I/O tag with value type Ci/Ai or as a relative time (0-60 seconds) into the value of I/O tag with TiR value type.

Note 2: When using the system and line redundant categories of lines, the status of line and station is formed by a logical sum of all used lines. It means, that if the redundant system consists of four lines and just one line is working, the status of the station and line is all right. The status of lines is presented with the help of special input or output I/O tag (of integer and real type, i.e. Ai/Ao/Ci/Co). The name of this I/O tag has this format: [line_name]_SystemStatus (e.g. for line L.Test it is M.Test_SystemStatus). The value of the I/O tag represents the binary format of the status of N-tuple lines. If the first three lines are okay but the last one does not work (SystemB/SecondaryLine) i.e. [FALSE, TRUE, TRUE, TRUE], I/O tag has the value 0b0111, i.e. 7.
The order of lines mapped to individual bits is [SystemB/SecondaryLine,  SystemB/PrimaryLine, SystemA/SecondaryLine, SystemA/PrimaryLine].


Browse

For the I/O tags, it is possible to discover the list of objects, as long as the KOM process is running and communication with a station is established.
Clicking the Browse button opens the IEC870-5-101 Item Browser window and displays a list of objects that have been read so far. The object list is created dynamically as a result of received messages.

The list of objects is dynamic, i.e. when a new value arrives in the KOM process, it is updated. Filtering in individual columns is also supported, asterisks can be used in the mask (e.g. *Short*).

Double-clicking on a particular line will cause the Address parameter to be inserted into the configuration of the I/O tag from which the IEC870-5-101 Item Browser window was opened.

The Refresh button clears the list of values in both the CNF and the KOM process.

The Value column contains the received value.

Image AddedNote 2: When using the system and line redundant categories of lines, the status of line and station is formed by a logical sum of all used elements. It means, that if the redundant system consists of four lines and just one line is working, status of station and line is all right. The status of lines is presented with the help of special output I/O tag (of integer and real type). Name of this I/O tag has this format: [name of line]_SystemStatus (e.g. for line L.Test it is M.Test_SystemStatus). The value of I/O tag represents binary format of status of N-tuple lines. If the first three lines are okay but the last one does not work (SystemB/SecondaryLine) i.e. [FALSE,TRUE,TRUE,TRUE], I/O tag has the value 0b0111, i.e. 7.
The order of lines mapped to individual bites is [SystemB/SecondaryLine,  SystemB/PrimaryLine, SystemA/SecondaryLine, SystemA/PrimaryLine].

Kotva
tell_cmd
tell_cmd
Tell commands

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Info
titleBlogs

You can read blogs about  about the IEC 870-5-101 protocol (for now, in Slovak language only): 

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Kotva
zmeny_upravy
zmeny_upravy
Changes and modifications

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  • June , 2015 - implemented Source Flags parameter

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  • Ver. 1.0 - November 22nd, 2007 - document creating
  • Ver. 1.1 - April 22nd, 2009 - document updating
  • Ver. 1.2 - June 8th, 2015 - new parameter implemented
  • Ver. 1.3 – June 15th, 2020: browsing support


Info
titleRelated pages:

Communication protocols

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