624 Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Chapter 19 ASCII Conversion Instructions (STOD, STOR, DTOS, RTOS, UPPER, LOWER)
Execution:
Example: When MV_read.EM is set, the STOD instruction converts the first set of
numeric characters in MV_msg to an integer value. The instruction skips the
initial control character ($06) and stops at the delimiter ( \ ).
Relay Ladder
Structured Text
IF MV_read.EM THEN
STOD(MV_msg,MV_msg_nmbr);
MV_read.EM := 0;
END_IF;
Condition Relay Ladder Action Structured Text Action
Prescan The rung-condition-out is set to false. No action taken.
Rung-condition-in is false The rung-condition-out is set to false. N/A
Rung-condition-in is true The instruction executes.
The rung-condition-out is set to true.
N/A
EnableIn is set N/A EnableIn is always set.
The instruction executes.
Instruction execution SC is set.
Destination is cleared.
The instruction converts the Source.
If the result is zero, then S:Z is set
Postscan The rung-condition-out is set to false. No action taken.
MV_read.EM
String To DINT
Source MV_msg
'$06324\12\1\$r'
Dest MV_msg_nmbr
324
STOD
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