This function block logs 100 Profibus or DP slave communication errors/events with timestamp information into an instance data block for evaluation. It checks for lost communication or re-established communication with a slave based on OB86 event class and fault ID. It retrieves the affected slave number, converts the date and time to integers, and stores this information along with lost/re-established status in the data block. It shifts existing entries down to make room for the new entry at the top.

1. Tony Bell SIMATIC Page 1
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FUNCTION_BLOCK FB86
TITLE =
//Must be called from OB86!
//Logs 100 PN or DP Slave communication errors/events with time stamp info into its instance Data block
//for evalutation
AUTHOR : 'T-Bell'
VERSION : 1.1
Know_How_Protect
VAR
Slave_Event_Number : ARRAY [1 .. 100 ] OF //////Begin Profibus Slave Communication Events
UDT1;
END_VAR
VAR_TEMP
OB86_EV_Class : BYTE ; //OB86_EV_Class
POINTER1: DWORD ;
Lost_Com : BOOL ;
Re_Established_Com : BOOL ;
OB86_Flt_Id : BYTE ; //OB86_Flt_Id
Station_Number : INT ;
Year : INT ;
Month : INT ;
Day : INT ;
Hour : INT ;
Minute : INT ;
Second : INT ;
Milisecond : INT ;
Counter1 : Int ;
END_VAR
BEGIN
NETWORK
TITLE =
L P##POINTER1; // FIND THE ADDRESS OF POINTER1
LAR1; // STRORE IN AR1
L B#16#87; //INITIALIZE POINTER1 WITH A POINTER TO FATHER MEMORY 0.0
T LB [AR1, P#0.0];
L 0;
T LB [AR1, P#1.0];
T LW [AR1, P#2.0];
//Check for profibus slave communication errors and log info into INSTANCE DB
////////////////////////////////////////////////////////////////////////////////////////////////////////
L POINTER1; //LOAD POINTER1 INTO AR1
LAR1;
L B[AR1, P#1.0];
T #ob86_Flt_Id;
L B[AR1, P#0.0];
T #ob86_EV_Class; //Check if lost com with a slave or com re-established with a slave
L 57; //57 dec (39H) Lost com with a slave
==I ;
JCN Stp2; //Else, jump to Stp2 slave com re-established
= #Lost_Com; //Lost slave com
NOT ;
= #Re_Established_Com;
JU Stp3; //Jump unconditionally to Stp3
Stp2: = #Re_Established_Com; //Slave com re-established
NOT ;
= #Lost_Com;
// The last byte of Ob86_Racks_Fltd contains the address of the affected slave
Stp3: L B[AR1, P#11.0];//Find which slave left or returned
T #Station_Number; //Transfer to affected slave
// Pull the date and time the event occured, convert to integer, and store in local temp memory
L B[AR1, P#12.0];
BTI ;
T #Year;
L B[AR1, P#13.0];
BTI ;
T #Month;
L B[AR1, P#14.0];
BTI ;
T #Day;
L B[AR1, P#15.0];
FUNCTION_BLOCK FB86
TITLE =
//Must be called from OB86!
//Logs 100 PN or DP Slave communication errors/events with time stamp info into its instance Data block
//for evalutation
AUTHOR : 'T-Bell'
VERSION : 1.1
Know_How_Protect
VAR
Slave_Event_Number : ARRAY [1 .. 100 ] OF //////Begin Profibus Slave Communication Events
UDT1;
END_VAR
VAR_TEMP
OB86_EV_Class : BYTE ; //OB86_EV_Class
POINTER1: DWORD ;
Lost_Com : BOOL ;
Re_Established_Com : BOOL ;
OB86_Flt_Id : BYTE ; //OB86_Flt_Id
Station_Number : INT ;
Year : INT ;
Month : INT ;
Day : INT ;
Hour : INT ;
Minute : INT ;
Second : INT ;
Milisecond : INT ;
Counter1 : Int ;
END_VAR
BEGIN
NETWORK
TITLE =
L P##POINTER1; // FIND THE ADDRESS OF POINTER1
LAR1; // STRORE IN AR1
L B#16#87; //INITIALIZE POINTER1 WITH A POINTER TO FATHER MEMORY 0.0
T LB [AR1, P#0.0];
L 0;
T LB [AR1, P#1.0];
T LW [AR1, P#2.0];
//Check for profibus slave communication errors and log info into INSTANCE DB
////////////////////////////////////////////////////////////////////////////////////////////////////////
L POINTER1; //LOAD POINTER1 INTO AR1
LAR1;
L B[AR1, P#1.0];
T #ob86_Flt_Id;
L B[AR1, P#0.0];
T #ob86_EV_Class; //Check if lost com with a slave or com re-established with a slave
L 57; //57 dec (39H) Lost com with a slave
==I ;
JCN Stp2; //Else, jump to Stp2 slave com re-established
= #Lost_Com; //Lost slave com
NOT ;
= #Re_Established_Com;
JU Stp3; //Jump unconditionally to Stp3
Stp2: = #Re_Established_Com; //Slave com re-established
NOT ;
= #Lost_Com;
// The last byte of Ob86_Racks_Fltd contains the address of the affected slave
Stp3: L B[AR1, P#11.0];//Find which slave left or returned
T #Station_Number; //Transfer to affected slave
// Pull the date and time the event occured, convert to integer, and store in local temp memory
L B[AR1, P#12.0];
BTI ;
T #Year;
L B[AR1, P#13.0];
BTI ;
T #Month;
L B[AR1, P#14.0];
BTI ;
T #Day;
L B[AR1, P#15.0];

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BTI ;
T #Hour;
L B[AR1, P#16.0];
BTI ;
T #Minute;
L B[AR1, P#17.0];
BTI ;
T #Second;
L W[AR1, P#18.0];
SRW 4;
BTI ; //Drop day of week
T #Milisecond;
//Shift all the slave information down in the buffer data block 99 entries
LAR1 P#1764.0; //Initialize pointer
L 99;
L1: T #Counter1; //Initialize the loop counter
L DID [AR1,P#0.0]; //Begin shifting values down in the buffer starting at the next to last entry
T DID [AR1,P#18.0]; //The last entry will simply be overwritten
L DID [AR1,P#4.0];
T DID [AR1,P#22.0];
L DID [AR1,P#8.0];
T DID [AR1,P#26.0];
L DID [AR1,P#12.0];
T DID [AR1,P#30.0];
L DIW [AR1,P#16.0];
T DIW [AR1,P#34.0];
TAR1 ; //Subtract 18 bytes from Ar1 (The size of the slave information being stored)
L P#18.0;
-D ;
LAR1 ;
L #Counter1;
LOOP L1; //Loop until all values are shifted down
// Overwrite the first entry with the new entry
L LD 6; //Store the slave event information... Lost com, Re-established com, Slave number
T DID 0;
L LD 10; //Store the integer converted date and time information
T DID 4;
L LD 14;
T DID 8;
L LD 18;
T DID 12;
L #Milisecond;
T DIW 16;
End: SET;
SAVE;
END_FUNCTION_BLOCK
BTI ;
T #Hour;
L B[AR1, P#16.0];
BTI ;
T #Minute;
L B[AR1, P#17.0];
BTI ;
T #Second;
L W[AR1, P#18.0];
SRW 4;
BTI ; //Drop day of week
T #Milisecond;
//Shift all the slave information down in the buffer data block 99 entries
LAR1 P#1764.0; //Initialize pointer
L 99;
L1: T #Counter1; //Initialize the loop counter
L DID [AR1,P#0.0]; //Begin shifting values down in the buffer starting at the next to last entry
T DID [AR1,P#18.0]; //The last entry will simply be overwritten
L DID [AR1,P#4.0];
T DID [AR1,P#22.0];
L DID [AR1,P#8.0];
T DID [AR1,P#26.0];
L DID [AR1,P#12.0];
T DID [AR1,P#30.0];
L DIW [AR1,P#16.0];
T DIW [AR1,P#34.0];
TAR1 ; //Subtract 18 bytes from Ar1 (The size of the slave information being stored)
L P#18.0;
-D ;
LAR1 ;
L #Counter1;
LOOP L1; //Loop until all values are shifted down
// Overwrite the first entry with the new entry
L LD 6; //Store the slave event information... Lost com, Re-established com, Slave number
T DID 0;
L LD 10; //Store the integer converted date and time information
T DID 4;
L LD 14;
T DID 8;
L LD 18;
T DID 12;
L #Milisecond;
T DIW 16;
End: SET;
SAVE;
END_FUNCTION_BLOCK