Automatic control function programming manual ladder language

Example 1
Consider the following variables
%V100.L = «Tool number:%5d Type:%2c%2c Time of use:
%M50.W = 255
%2d hours %2d minutes»
%M52.B = 0x55
%M54.B = 2
%M55.B = 57
(0x55 ASCII code for t, 0x57 ASCII code for v)
The instruction printf(%V100.L, %M50.W, %M52.B,0x57, %M54.B, %M55.B) displays:
Tool number: 255 Type: tv Time of use: 2 hours 57 minutes
Example 2
Displaying a Simple String
%V200.L = «Do you want to know the time? (Y/N)»
printf(%V200.L) displays: Do you want to know the time? (Y/N)
Transparent Mode
Displaying a String with a Display Format for the Arguments
If %M10.B = 3;
If %M11.B = 15;
%V200.L = «It is %2d:%2d»
printf(%V200.L, %M10.B, %M11.B) displays: It is 3:15
The two characters \n cause a jump to the next line when displaying the string (the compiler replaces the characters
\n by bytes 0xd 0xa).
Example 3
%V200.L = «1 - Read \n 2 - Write»
printf(%V200.L) displays
1 - Read
2 - Write
Return code
If OK
Number of characters transmitted for display.
Error
-1: Not in transparent mode, the calling task is not a %TF task.
-2: Max. formatting buffer size (255 bytes) exceeded.
-3: Format error in the format string.
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