Message Data Description Method - Mitsubishi Electric MELDAS C6 Programming Manual

1. PLC Development Environment Using GX Developer

1.4.2 Message Data Description Method

The message data can be described as text data by a general text editor and also by commercially
available spreadsheet software in addition to the direct input with GX Developer.
(1) Description Format
Message data is classified into setting areas to store the setting for each message and message
areas to store message data. It is described in the following respective description format.
(a) Setting area
The message length and No. of messages are set for each message in the setting area. The
message data region secured by the CNC can be adjusted to the most efficient status using
these settings. The respective maximum values are set if nothing is set. (Refer to "(4)
Precautions" for the maximum values.)
;$, message classification code, maximum message length, No. of messages [CR]
(b) Message area
The message area is described using the following description format.
The description format cannot be abbreviated. Comma(,) and [CR] must be described, even the
message character string is blank.
Message classification
Alarm message
Operator message
PLC switch
Comment message
Message classification
code
Index No.
Switch No.
Data register No.
Device
Device No.
Message character string
Semicolon( ; )
Comma( , )
[CR]
1.4 Creating PLC-related Data
A:Alarm message O:Operator message
P:PLC switch
;A, index No., data register No., message character string [CR]
;O, index No., data register No., message character string [CR]
;P, switch No. message character string [CR]
;M, device, device No., message character string [CR]
: A one-byte alphabetic character expressing each message
classification
: One-byte number (0 to No. of messages in the setting area - 1)
: One-byte number (0 to No. of messages in the setting area - 1)
: One-byte number
: One-byte number (1 or 2)
: One-byte number (0 to 10)
: One-byte alphanumeric character, shift JIS Code 1 character,
No. of characters in the setting area message length.
Semicolons, commas, spaces and tabs can also be used. Note
that the tab at the head of the message character string is
ignored.
: Message data identification code
: Separator between each description (a comma only is used to
leave a message character string blank)
: Line feed code, (CR/LF) or (LF).
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M:Comment message
Description format