ProSoft Technology PTQ-104C - Manual (Page 50)

Module Configuration 49TPTQ-104C ♦ 48TQuantum Platform
12TUser Manual 47TIEC 60870-5-104 Client
Command Control Blocks
Block identification codes greater than 9900 are utilized to perform special
functions in the module. Each control block recognized and used by the module
is defined in the following topics.
Command Codes Descriptions
9250 Status Block
9251 Client X Status Data
9901 User Constructed Command
9902 Command Control Block (Add command to Command List Queue)
9903 Event Messages from Master port
9950
Command List Error data
9970
Set PLC time using module's time
9971
Set module's time using PLC time
9999 Cold Boot Request from PLC (Block contains no data)
Note: The command code in the I/O area is also referred to as the block ID.
Implementing Ladder to Support Special Functions
In order to use Special Functions, some form of control logic must be
implemented. The following section uses structured text language to illustrate
how a typical function might be implemented.
Example: Rebooting the Module.
MyTrigger is a variable that triggers this logic
OutputControl variable array starts at register 4000001
The first instruction guarantees that the processor requests this block for only
one scan.
The second instructions sets the Block Number (9999 = ColdBoot) and then sets
the sequence number to 1.
IF MyTrigger>0 AND OutputControl1[1]> 0 THEN
OutputControl1[0]:= InputData[0];
OutputControl1[1]:=0;
MyTrigger :=0;
END_IF;
IF (MyTrigger=9999)OR (MyTrigger=9998) OR (MyTrigger=9250) THEN
OutputControl1[1] :=MyTrigger;
Temp:=WORD_TO_INT(OutputControl1[0]);
Temp:=Temp+1;
OutputControl1[0]:=INT_TO_WORD(Temp);
END_IF;
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March 4, 2013