A CAB printer can receive print jobs via Ethernet Raw using it’s own JScript syntax. Each command is separated by a line.
In order to do this from a SIMATIC S7-300 PLC, I’ve made an array of string (1-20) representing each line. Then the commands can be written directly in the code, and with CONCAT function dynamic data from tags can be added.
// // Generate lines // statLines[1] := 'J'; // Line of JScript statLines[2] := 'S l1;0,0,50,53,85;ErrLbl'; // Line of JScript statLines[3] := 'H 125,0,T,R0,B0'; // Line of JScript statLines[4] := 'O R,P'; // Line of JScript statLines[5] := 'T 0,7.77,0,3,4,u,k,q80;[J:c38.25]Production ID'; // Line of JScript statTempLine := 'B 8.16,12.58,0,datamatrix,1;'; // 1. part of line of JScript statLines[6] := CONCAT(IN1:=statTempLine,IN2:=statProductCode); // Combine 1. part with product code statLines[7] := 'T 36.16,8.02,0,3,4,u,k,q80;[J:c48.84]Error Code'; // Line of JScript statTempLine := 'T 37.6,14.64,0,3,6,k,q80;[J:c47.4]'; // 1. part of line of JScript statLines[8] := CONCAT(IN1:=statTempLine,IN2:=statErrorCode); // Combine 1. part with error code statTempLine := 'T 0,46.47,0,3,4,k,q80;[J:c78.93]'; // Line of JScript statLines[9] := CONCAT(IN1:=statTempLine,IN2:=statProductCode); // Combine 1. part with product code statLines[10] := 'G38.59,3.52,0;R:44.26,38.33,0.2,0.2'; // Line of JScript statLines[11] := 'A 1'; // Line of JScript statLines[12] := ''; statLines[13] := ''; statLines[14] := ''; statLines[15] := ''; statLines[16] := ''; statLines[17] := ''; statLines[18] := ''; statLines[19] := '';
Now each line can be combined into a array of characters and send as a TCP telegram using the T-Blocks (TCON, TSEND, TRCV etc.). What I do is to run a loop through each line and move each character to an array. At the end of each line I add a Carriage Return (0xD) to the array.
// Convert all lines to array of charactors for telegram handling FOR statIndexLines := 1 TO 11 DO // Find length of string statStringLength := LEN(statLines[statIndexLines]); // Run through string and move every charactor to array IF (statStringLength <> 0) THEN FOR statIndexLength := 1 TO statStringLength DO // Get charactor from string and move to array of charactors statSendCharactors[statMemoryCharIndex] := STRING_TO_CHAR(MID(IN:=statLines[statIndexLines],L:=1,P:=statIndexLength)); // Increment charactor index for every cycle statMemoryCharIndex := (statMemoryCharIndex + 1); END_FOR; END_IF; // Add Carriage Return after each line statSendCharactors[statMemoryCharIndex] := '$R'; // Increment charactor index statMemoryCharIndex := (statMemoryCharIndex + 1); END_FOR;
The block itself handles the TCP/IP communication and acts as client.
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Hedeby August 3rd, 2016
Posted In: Automation, IT, S7-300/400, SIMATIC, Structured Text (SCL/ST)