Mitsubishi Electric MELSEC-Q/L - User Message

7 APPLICATION INSTRUCTIONS
7.19 Other Instructions
817
7
User message
UMSG
*1 Only strings can be used
Processing details
• The string data specified by (S) is displayed as a user message in the display unit. The character string specified directly by
(S) (enclosed in double quotes (" ")) or the character string from the number for the device specified by (S) to the number
for the device storing the NULL code "00H" is displayed.
• Strings of up to 128 single-byte characters can be displayed in the display unit.
• The user message is displayed when the UMSG instruction command is rising. If the string is changed while the command
is on, then the modified user message will appear in the display unit.
• The string specified by the UMSG instruction is displayed upon END processing. If two or more UMSG instructions are
executed, then the last UMSG instruction executed before the END is valid. If two or more programs are running, then the
last UMSG instruction to be executed is valid.
• This instruction is not processed if it is run when no display unit is mounted.
• If the "ESC" key on the display unit is pressed while a user message is being displayed, the displayed message will
disappear. To display the message again, execute "User Message" from the menu screen on the display unit.
• If a NULL code (00H) is specified as the argument to this instruction, then any message currently being displayed will
disappear. The procedure for specifying a NULL code (00H) in the instruction parameter is as follows.
• See the MELSEC-L CPU Module User's Manual (Function Explanation, Program Fundamentals) for details about the
display unit.
• Built-in Ethernet port LCPU: Supported
• L02SCPU and L02SCPU-P cannot be used.
(S): String to display on display unit, or lead number (string) of device storing string to display
Setting
data
Internal device R, ZR J\ U\G Zn Constant Others
Bit Word Bit Word K, H Real
string
(S)   
*1

Universal
Basic
High
performance
Process Redundant LCPU
Ver.
UMSG
UMSG
S
Command
b15 to b8 b7 to b0
2nd char 1st char
4th char 3rd char
6th char 5th char
8th char 7th char
10th char 9th char
Run UMSG
instruction
00
Indicates end of string.
Message appears
on display unit.
S
+1
+2
+3
+4
S
S
S
S
H
User message
Process A complete.
Specifying a NULL code(00H)