View source for IBH Link UA:Integrated S7 SoftPLC


=== Introduction ===


The IBH Link UA additional contains a SoftPLC. The SoftPLC is able to read and write variables from the OPC UA server. <br />

The integrated SoftPLC can be used for data preprocessing and supports the programming languages LAD, FBD, STL, SCL or S7-GRAPH.


[[Image:IBH_Link_UA_SoftPLC_Overview.png|400px]]

=== '''Commissioning''' ===


==== Activate the integrated SoftPLC ====

First, the SoftPLC needs to be activated using the web interface:


[[Image:IBH_Link_UA_SoftPLC_Insert.png|798px]]


==== Define SoftPLC within PLC project ====

Therefore on the defined slot of the PC station a SoftPLC must be added.


SIMATIC Manager:


[[Image:IBH_Link_UA_SoftPLC_Insert_STEP7.png|576px]]


[[Image:IBH_Link_UA_SoftPLC_S7_Configuration_STEP7.png|419px]]


TIA Portal:


[[Image:IBH_Link_UA_SoftPLC_Catalog_TIA.png|313px]]


[[Image:IBH_Link_UA_SoftPLC_Configuration_TIA.png|454px]]


A S7 connection between the SoftPLC and the OPC UA Server must be established:


SIMATIC Manager:


[[Image:IBH_Link_UA_SoftPLC_S7_Connection_STEP7.png|836px]]


TIA:


[[Image:IBH_Link_UA_SoftPLC_Server_Connections_TIA.png|1097px]]


The SoftPLC supports the programming languages LAD, FBD, STL, SCL or S7-GRAPH.

=== SoftPLC Status and Settings ===

The '''SoftPLC Status''' can be monitored on the web interface:



[[Image:IBH_Link_UA_SoftPLC_Status.png|791px]]


The performance of the SoftPLC can be adjusted:


{| class="wikitable"

|-

! CPU Share PLC !! processing time (1000 mixed instructions)

|-

| 50%  || apx. 360 µs

|-

| 33% || apx. 550 µs

|-

| 25%  || apx. 720 µs

|-

| 20%  || apx. 900 µs

|-

| 12%  || apx. 1800 µs

|}



Furthermore, the status of the '''SoftPLC Connections''' is available.:


[[Image:IBH_Link_UA_SoftPLC_Connections.png|769px]]


=== Server Function ===


A S7 connection between the SoftPLC and the OPC UA Server must be established::


SIMATIC Manager:


[[Image:IBH_Link_UA_SoftPLC_S7_Connection_STEP7.png|836px]]


TIA:


[[Image:IBH_Link_UA_SoftPLC_Server_Connections_TIA.png|1261px]]


Within the properties of the OPC Server at <'''General'''> <'''S7'''> <'''OPC tags'''> the OPC Tags can be selected:


[[Image:IBH_Link_UA_SoftPLC_Server_OPC_Variables.png|977px]]


Now the configuration needs to be downloaded to the IBH Link UA:


[[Image:IBH_Link_UA_SoftPLC_Download_TIA.png|860px]]<br /><br />


The configuration is now completed and the tags from the '''SoftPLC''' within the IBH Link UA are available :


[[Image:IBH_Link_UA_SoftPLC_OPC_Slot.png|527px]]


[[Image:IBH_Link_UA_SoftPLC_UA_Client.png|1318px]]


=== Client Function ===

==== Cyclic Read and Write ====

The SoftPLC is able to read and write the OPC variables cyclically. <br/>The configuration will be done within the SFB 8 (USEND) and called during the warm start (OB100).

{| class="wikitable"

|-

! Parameter !! Declaration !! Data type !! Storage area !! description

|-

| REQ || INPUT || BOOL || E, A, M, D, L || Not evaluated

|-

| ID || INPUT ||WORD  ||M, D, Const. || Fixed value: 65400

|-

| R_ID || INPUT || DWORD || E, A, M, D, L, Const. || Mode<br/>Low Word:<br/>0: Read(Variable as XML String)<br/>1: Write(Variable as XML String)<br/>2: Read(PLC Variable)<br/>3: Write(PLC Variable)<br/>4: Read(Special Variable)<br/>5: Write(Special Variable)<br/>6: Read(Server Variable)<br/>7: Write(Server Variable)<br/><br/>High Word:<br/>Sampling in milliseconds

|-

| DONE || OUTPUT || BOOL || E, A, M, D, L || is not set

|-

| ERROR || OUTPUT || BOOL || E, A, M, D, L ||ERROR=0:<br/>The parameters were passed correctly<br/>ERROR=1:<br/>The parameters were passed not correctly 

|-

| STATUS || OUTPUT || WORD || E, A, M, D, L || is no set

|-

| SD_1 || IN_OUT || ANY || D || Pointer to the OPC Variable. 

|-

| SD_2 || IN_OUT || ANY || E, A, M, D || Pointer to the OPC Variable for the value of the OPC Variable. <br/>Allowed is Data Type BOOL, BYTE, CHAR, WORD, INT, DWORD, DINT, REAL, DATE, DATE_AND_TIME.<br/>

'''Note''':<br/>If the ANY pointer points to a DB, the DB must always be specified (f.i.: P# DB10.DBX5.0 Byte 0). 

|-

| SD_3 || IN_OUT || ANY || E, A, M, D || Pointer to the PLC Variable for the status of the Variable.<br/>Allowed is Data Type DWORD<br/>'''Note:'''<br/>If the ANY pointer points to a DB, the DB must always be specified (f.i.: P# DB10.DBX5.0 Byte 10).

|-

| SD_4 || IN_OUT || ANY || D || Pointer to the PLC Variable for the Time Stamp.<br/>Allowed is Data Type DATE_AND_TIME.<br/>'''Note:'''<br/>If the ANY pointer points to a DB, the DB must always be specified (f.i.: P# DB10.DBX5.0 Byte 10).

|}<br/><br/>

The OPC Variables are defined as follows:


:'''Mode 0 '''and''' 1: ´ns=<Namespace>;s=<Identifier>'''´

::or: '''ns=<Namespace>;i=<Numeric Identifier>'''´

::All OPC Variables can be read using this mode. The IBH Link UA knows the following Namespaces


::{| class="wikitable"

|-

! Namespace !! Area

|-

| 0 || General OPC Server Variables

|-

| 1, 2, 3, 5 || No evaluable variables

|-

| 4 || All PLC specific OPC variables

|-

| 6 || IBH Link UA Special Variables

|}

:'''Mode 2 '''and''' 3: ´<Identifier>´'''<br/>

::The identifier is formed as follows:<br/>'''<Station name>.<PLC Name>.<GlobalVars>.<Variable name from Variables table>'''<br/>or:<br/>'''<Station name>.<PLC Name>.<Programs>.<Data block name>.<Variable name>'''


:'''Mode 4 '''and''' 5: <Numeric Identifier>'''<br/>

::Number of the Special Variable from Namespace 6.

:'''Modus 6 '''and''' 7: <Numeric Identifier>'''

::Number of the Server Variable from Namespace 0.<br/><br/>


===== Sample TIA Portal =====

Create a function block for the client configuration:


[[Image:IBH_Link_UA_SoftPLC_Create_New_Block.png|688px]]



[[Image:IBH_Link_UA_SoftPLC_Config_Block.png|388px]]


The PLC Variable '''OutputVal''' will be written cyclically into the  OPC Variable '''S7-1500.S7-1500.GlobalVars.InputVal'''.<br/>The sampling rate is 16#00c8 or 200 milliseconds.<br/>The OPC Status is written in the same cycle as '''Output Val ''' into the variable '''# Status_1 ''' and the time stamp of the cycle into the variable ''' # timestamp_1 '''.<br/>Now the configuration block must be called within OB100.



==== Server Bridge ====

The basic procedure is described at [http://wiki.ibhsoftec.com/en/IBH_Link_UA:Client_functions IBH Link UA Client Functions].<br />

The server, between which a communication should be established, need to be defined. <br />

First, the own server URL of the IBH Link UA is specified:


[[Image:IBH_Link_UA_SoftPLC_Discovery_Servers.png|1048px]]


Furthermore, the desired security level can be chosen.<br />

Now the variables of the SoftPLC can be selected for reading:


[[Image:IBH_Link_UA_SoftPLC_Select_Variables_To_Read.png|813px]]


and can be connected to a variable of another OPC UA Server:


[[Image:IBH_Link_UA_SoftPLC_Connect_Variables.png|764px]]<br />

<br />

<br />


===Instruction set===

==== Bit logic instructions ====


{| class="wikitable"

|-

! Instruction !! Operand !! Description

|-

|style="width: 5em"| A ||style="width: 5em"|  ||style="width: 22em"| AND with a scan to "1"“

|-

| AN ||  || AND with a scan to "0"

|-

| O ||  || OR with scan to "1"

|-

| ON ||  || OR with scan to "0"

|-

| X ||  || Exclusive-OR with a scan to "1"

|-

| XN ||  || Exclusive-OR with a scan to "0"

|-

|  || I || of an input

|-

|  || Q || of an output

|-

|  || M || of a memory

|-

|  || L || of a local data bit

|-

|  || T || of a timer

|-

|  || C || of a counter

|-

|  || DBX || of a data bit

|-

|  || DIX || of an instant data bit

|-

| ==0 ||  || result equal zero

|-

| <>0 ||  || result unequal zero

|-

| >0 ||  || result greater than zero

|-

| >=0 ||  || result greater or equal zero

|-

| <0 ||  || result less than zero

|-

| <=0 ||  || result less or equal zero

|-

| UO ||  || invalid result

|-

| OV ||  || overflow

|-

| OS ||  || overflow (saving)

|-

| BR ||  || binary result

|}


==== Other boolean logic instructions ====


{| class="wikitable"

|-

! Operation !! Operand !! Description

|-

|style="width: 5em"| A( ||style="width: 5em"|  ||style="width: 22em"| AND left parenthesis

|-

| AN( ||  || AND NOT left parenthesis

|-

| O( ||  || OR left parenthesis

|-

| ON( ||  || OR NOT left parenthesis

|-

| X( ||  || Exclusive OR left parenthesis

|-

| XN( ||  || Exclusive OR NOT left parenthesis

|-

| ) ||  || Right parenthesis

|-

| O ||  || OR-ing AND operations 

|-

| NOT ||  || Negate RLO

|-

| SET ||  || Set RLO to "1"

|-

| CLR ||  || Set RLO to "0"

|-

| SAVE ||  || Save RLO to the BR bit

|-

|}


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| = ||style="width: 5em"|  ||style="width: 22em"| Assign value of RLO

|-

| S ||  || Set

|-

| R ||  || Reset

|-

| FP ||  || Positive edge detection

|-

| FN ||  || Negative edge detection

|-

|  || I || of an input bit

|-

|  || Q || of an output bit

|-

|  || M || of a memory bit

|-

|  || L || of a local data bit

|-

|  || DBX || of a data bit

|-

|  || DIX || of a instance data bit

|}


==== Master Control Relay ====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| MCRA ||style="width: 5em"|  ||style="width: 22em"| Activate MCR

|-

| MCRD ||  || Deactivate MCR

|-

| MCR( ||  || Open MCR zone

|-

| )MCR ||  || Close MCR zone

|}


==== Load / Transfer instructions ====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| L ||style="width: 5em"|  ||style="width: 22em"| Load operand

|-

| T ||  || Transfer operand

|-

|  || IB || Input byte

|-

|  || IW || Input word

|-

|  || ID || Input double word

|-

|  || QB || Output byte

|-

|  || QW || Output word

|-

|  || QD || Output double word

|-

|  || MB || Memory byte

|-

|  || MW || Memory word

|-

|  || MD || Memory double word

|-

|  || LB || Local data byte

|-

|  || LW || Local data word

|-

|  || LD || Local data double word

|-

|  || DBB || Data block byte

|-

|  || DBW || Data block word

|-

|  || DBD || Data block double word

|-

|  || DIB || Instance data block byte

|-

|  || DIW || Instance data block word

|-

|  || DID || Instance data block double word

|-

|  || STW || Status word

|-

| L || const || Load constant value

|-

| L || #Pointer || Load pointer

|-

| L || T || Timer

|-

| LC || T || Timer (BCD coded)

|-

| L || Z || Counter

|-

| LC || Z || Counter (BCD coded)

|-

| L || DBNO || Data block number

|-

| L || DBLG || Data block length

|-

| L || DINO || Instance data block number

|-

| L || DILG || Instance data block length

|}


==== Peripheral access instructions ====


Peripheral access is not possible with the integrated SoftPLC.


==== Accumulator instructions ====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| PUSH ||style="width: 5em"|  ||style="width: 22em"| Push accumulators upwards

|-

| POP ||  || Push accumulators downwards

|-

| ENT ||  || Push accumulators (without A1) A2->A3, A3->A4

|-

| LEAVE ||  || Push accumulators (without A1) A4->A3, A3->A2

|-

| TAK ||  || Change ACCU1 with ACCU2

|-

| CAW ||  || Change ACCU1 bytes 0 and 1

|-

| CAD ||  || Change ACCU1 bytes 0 and 3, 1 and 2

|}


==== Shift and rotating instructions ====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| SLW ||style="width: 5em"|  ||style="width: 23em"| Shift ACCU1-L left (word shift)

|-

| SLD ||  || Shift ACCU1 left (double word shift)

|-

| SRW ||  || Shift ACCU1-L right (word shift)

|-

| SRD ||  || Shift ACCU1 right (double word shift)

|-

| SSI ||  || Shift ACCU1-L right (word shift with sign)

|-

| SSD ||  || Shift ACCU1 right (double word shift with sign)

|-

| RLD ||  || Rotate ACCU1 left (double word)

|-

| RLDA ||  || Rotate ACCU1 left through CC1

|-

| RRDA ||  || Rotate ACCU1 right through CC1

|-

| RRD ||  || Rotate ACCU1 right (double word)

|-

|  || const || Number of places to shift/rotate

|-

|  || - || Number of places to shift/rotate located in ACCU2

|}


==== Timer instructions ====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| SP ||style="width: 5em"| T ||style="width: 22em"| Start as impulse

|-

| SE || T || Start as extended impulse

|-

| SD || T || Start as ON-delay

|-

| SS || T || Start as saving ON-delay

|-

| SF || T || Start as OFF-delay

|-

| R || T || Reset timer

|-

| FR || T || Enable timer

|}


==== Counter instructions ====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| CU ||style="width: 5em"| C ||style="width: 22em"| Count up (increment)

|-

| CD || C || Count down (decrement)

|-

| S || C || Set counter

|-

| R || C || Reset counter

|-

| FR || C || Enable counter

|}


==== Word instructions ====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| AW ||style="width: 5em"|  ||style="width: 22em"| AND ACCU1-L (AND word)

|-

| AD ||  || AND ACCU1 (AND double word)

|-

| OW ||  || OR ACCU1-L (OR word)

|-

| OD ||  || OR ACCU1 (OR double word)

|-

| XOW ||  || Exclusive-OR ACCU (XOR word)

|-

| XOD ||  || Exclusive-OR ACCU (XOR double word)

|-

|  || const || with a word or double word constant

|-

|  || - || with ACCU2

|}


==== Arithmetic instructions ====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| ==I ||style="width: 5em"|  ||style="width: 22em"| Integer values equal

|-

| <>I ||  || Integer values unequal

|-

| >I ||  || Integer values greater

|-

| >=I ||  || Integer values greater or equal

|-

| <I ||  || Integer values less

|-

| <=I ||  || Integer values less or equal

|-

| ==D ||  || Double integer values equal

|-

| <>D ||  || Double integer values unequal

|-

| >D ||  || Double integer values greater

|-

| >=D ||  || Double integer values greater or equal

|-

| <D ||  || Double integer values less

|-

| <=D ||  || Double integer values less or equal

|-

| ==R ||  || Real values equal

|-

| <>R ||  || Real values unequal

|-

| >R ||  || Real values greater

|-

| >=R ||  || Real values greater or equal

|-

| <R ||  || Real values less

|-

| <=R ||  || Real values less or equal

|-

| SIN ||  || Sine of a real value

|-

| COS ||  || Cosine of a real value

|-

| TAN ||  || Tangent of a real value

|-

| ASIN ||  || Arcsine of a real value

|-

| ACOS ||  || Arccosine of a real value

|-

| ATAN ||  || Arctangent of a real value

|-

| SQR ||  || Square a real value

|-

| SQRT ||  || Square root a real value

|-

| EXP ||  || e to the power of a real value

|-

| LN ||  || Natural logarithm of a real value

|-

| +I ||  || Integer addition

|-

| -I ||  || Integer subtraction

|-

| *I ||  || Integer multiplication

|-

| /I ||  || Integer division

|-

| +D ||  || Double-integer addition

|-

| -D ||  || Double-integer subtraction

|-

| *D ||  || Double-integer multiplication

|-

| /D ||  || Double-integer division

|-

| +R ||  || Real addition

|-

| -R ||  || Real subtraction

|-

| *R ||  || Real multiplication

|-

| /R ||  || Real division

|-

| MOD ||  || Double integer division (modulo)

|-

| + || const || Add a constant

|-

| +P# || const || Add a pointer

|-

| DEC ||  || decrement ACCU1-LL (one byte)

|-

| INC ||  || increment ACCU1-LL (one byte)

|}


==== Data type conversion instructions ====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| ITD ||style="width: 5em"|  ||style="width: 22em"| Convert integer to double integer

|-

| ITB ||  || Convert integer to BCD

|-

| DTB ||  || Convert double integer to BCD

|-

| DTR ||  || Convert double integer to real

|-

| BTI ||  || Convert BCD to integer

|-

| BTD ||  || Convert BCD to double integer

|-

| RND ||  || Convert real to double integer (round)

|-

| RND+ ||  || Convert real to double integer (round up)

|-

| RND- ||  || Convert real to double integer (round down)

|-

| TRUNC ||  || Convert real to double integer (truncate)

|-

| INVI ||  || Invert ACCU1-L (integer)

|-

| INVD ||  || Invert ACCU1 (double integer)

|-

| NEGI ||  || Negate ACCU1-L (integer)

|-

| NEGD ||  || Negate ACCU1 (double integer)

|-

| NEGR ||  || Negate ACCU1 (real)

|-

| ABS ||  || Absolute value (real)

|}


==== Jump instructions ====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| JU ||style="width: 5em"| goal ||style="width: 26em"| Jump unconditional

|-

| JC || goal || Jump if RLO = 1

|-

| JCB || goal || Jump if RLO = 1 (save RLO)

|-

| JCN || goal || Jump if RLO = 0

|-

| JNB || goal || Jump if RLO = 0 (save RLO)

|-

| JBI || goal || Jump if BR = 1

|-

| JNBI || goal || Jump if BR = 0

|-

| JZ || goal || Jump if compare result = 0

|-

| JN || goal || Jump if compare result != 0

|-

| JP || goal || Jump if compare result > 0

|-

| JPZ || goal || Jump if compare result >= 0

|-

| JM || goal || Jump if compare result < 0

|-

| JMZ || goal || Jump if compare result <= 0

|-

| JUO || goal || Jump if compare result "Unordered Math Instruction"

|-

| JO || goal || Jump on overflow

|-

| JOS || goal || Jump on saving overflow

|-

| JL || goal || Jump distributor

|-

| LOOP || goal || Loop programming (decrement ACCU1-L and jump if != 0

|}


==== Block call instructions ====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| CALL FB ||style="width: 5em"|  ||style="width: 26em"| Unconditional call of an FB with parameter transfer

|-

| CALL FC ||  || Unconditional call of an FC with parameter transfer

|-

| CALL SFB ||  || Unconditional call of an SFB with parameter transfer

|-

| CALL SFC ||  || Unconditional call of an SFC with parameter transfer

|-

| UC FB ||  || Unconditional call of an FB without parameter transfer

|-

| CC FB ||  || Conditional call of an FB without parameter transfer

|-

| UC FC ||  || Unconditional call of an FC without parameter transfer

|-

| CC FC ||  || Conditional call of an FC without parameter transfer

|-

| BEU ||  || End block unconditionally

|-

| BEC ||  || End block conditionally (RLO = 1)

|-

| BE ||  || End block

|-

| OPN || ||

|-

|  || DB || Open data block

|-

|  || DI || Open instance data block

|-

| TDB ||  || Exchange data block registers

|}


==== Indirect addressing instructions ====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| LAR1/LAR2 ||style="width: 5em"|  ||style="width: 22em"| Load AR1/AR2

|-

|  || MD || with memory double word

|-

|  || LD || with local data double word

|-

|  || DBD || with data block double word

|-

|  || DID || with instance data block double word

|-

| LAR1 || - || Load AR1 with ACCU1

|-

| LAR2 || - || Load AR2 with ACCU1

|-

| LAR1 || AR2 || Load AR1 with AR2

|-

| LAR1 || P# || Load AR1 with pointer

|-

| LAR2 || P# || Load AR2 with pointer

|-

| TAR1/TAR2 ||  || Transfer in AR1/AR2

|-

|  || MD || in memory double word

|-

|  || LD || in local data double word

|-

|  || DBD || in data block double word

|-

|  || DID || in instance data block double word

|-

| TAR1 || - || Transfer AR1 in ACCU1

|-

| TAR2 || - || Transfer AR2 in ACCU1

|-

| TAR1 || AR2 || Transfer AR1 in AR2

|-

| TAR ||  || Swap AR1 with AR2

|-

| +AR1 ||  || Add ACCU1 to AR1

|-

| +AR2 ||  || Add ACCU1 to AR2

|-

| +AR1 || P# || Add pointer to AR1

|-

| +AR2 || P# || Add pointer to AR2

|}


====Program display and null operation instructions====


{| class="wikitable"

|-

! Operation  !! Operand !! Description

|-

|style="width: 5em"| NOP ||style="width: 5em"| 0 ||style="width: 22em"| Null operation instruction

|-

| NOP || 1 || Null operation instruction

|-

| BLD || const || Program display instruction (null operation)

|}


===Integrated organisation blocks===


The organisation blocks, listed in the chart below, are executed, if they are programmed:


{| class="wikitable"

|-

! OB no !! Short Description

|-

|style="width:14em"| OB 1 ||style="width:14em"| Main program

|-

| OB 10 – OB 17 || Time alarm

|-

| OB 20 – OB 23 || Delay alarm

|-

| OB 30 – OB 38 || Time blocks (cyclic call)

|-

| OB 80 – OB 87 || Error blocks

|-

| OB 90 || Background execution

|-

| OB 100/OB 101 || Warm or hot restart

|-

| OB 121/OB 122 || Programming faults

|}


===Integrated system functions===


All system functions (SFC) relevant for a Software PLC are integrated in ''S7-SoftPLC''.


The chart below shows the available SFCs(in numeric listing)


{| class="wikitable"

|-

! SFC no !! SF name !! Short Description

|-

|style="width:7em"| SFC 0 ||style="width:8em"| SET_CLK || Set system clock

|-

| SFC 1 || READ_CLK || Read system clock

|-

| SFC 6 || RD_SINFO || Read start information of actual OB

|-

| SFC 20 || BLKMOV || Copy PLC-variable in target-area

|-

| SFC 21 || FILL || Preoccupy PLC-variable in target-area

|-

| SFC 22 || CREAT_DB || Create data block

|-

| SFC 23 || DEL_DB || Delete data block

|-

| SFC 24 || TEST_DB || Test attributes of a data block

|-

| SFC 25 || COMPRESS || Compress load memory

|-

| SFC 28 || SET_TINT || Set time alarm

|-

| SFC 29 || CAN_TINT || Stop time alarm (do not execute)

|-

| SFC 30 || ACT_TINT || Enable time alarm

|-

| SFC 31 || QRY_TINT || Status of time alarm 

|-

| SFC 32 || SRT_DINT || Start delay alarm

|-

| SFC 33 || CAN_DINT || Stop delay alarm

|-

| SFC 34 || QRY_DINT || Status query of delay alarm

|-

| SFC 36 || MSK_FLT || Mask a synchron error occurrence

|-

| SFC 37 || DMSK_FLT || Demask a synchron error occurrence

|-

| SFC 38 || READ_ERR || Read out the occurrence status register

|-

| SFC 39 || DIS_IRT || Locking the asynchron and alarm error processing

|-

| SFC 40 || EN_IRT || Enable the asynchron and alarm error processing

|-

| SFC 41 || DIS_AIRT || Delay high-priority asynchron and alarm error processing

|-

| SFC 42 || EN_AIRT || Enable high-priority asynchron and alarm error processing

|-

| SFC 43 || RE_TRIGR || Retrigger the Watchdog

|-

| SFC 46 || STP || CPU operating state STOP

|-

| SFC 51 || RDSYST || Read out system status list (SSL)

|-

| SFC 64 || TIME_TCK || Timer Tick

|-

| SFC 81 || UBLKMOV || Block Move, that can not be stopped

|}


===Integrated system blocks===


The system blocks (SFB) relevant for a software PLC are integrated in ''S7-SoftPLC''.


The following system function blocks are supported:


{| class="wikitable"

|-

! SFB no !! SFB name !! Short Description

|-

|style="width:7em"| SFB 0 ||style="width:7em"| CTU || Count up

|-

| SFB 1 || CTD || Count down

|-

| SFB 2 || CTUD || Count up and down

|-

| SFB 3 || TP || Generate pulse

|-

| SFB 4 || TON || Generate ON-delay

|-

| SFB 5 || TOF || Generate OFF-delay

|-

| SFB 8 || USEND || OPC UA Client Configuration

|-

| SFB 32 || DRUM || Implement sequencer

|}


===Technical Data===


{| class="wikitable"


|-

| Load memory ||5 MB

|-

| Main memory  || > 100 MB

|-

| Blocks || 16.384

|-

| Flags (Bit)  || 131.072

|-

| Timer  || 2048

|-

| Counter  || 2048

|-

| Digital I/O  || 32.768 Bit

|-

|  || processing times 1) 

|-

| CPU Chare PLC 50%  || apx. 360 µs

|-

| CPU Chare PLC 33% || apx. 550 µs

|-

| CPU Chare PLC 25%  || apx. 720 µs

|-

| CPU Chare SPS 20%  || apx. 900 µs

|-

| CPU Chare SPS 12%  || apx. 1800 µs

|}


1) 1024 mixed instructions (50% Binär, 50% Digital)