Panasonic FP7 CPU Unit, Руководство пользователя

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8.3 MEWTOCOL-COM Format
8.3.2 MEWTOCOL-COM Command Format

Command message
(1) Header (start code)
Commands must always have a “%” (ASCII code: H25) or a “<” (ASCII code: H3C) at the
beginning of a message.
(2) Station no.
• The station no. of the PLC to which you want to send the command must be specified. The
station no. of the PLC is specified by the system register. In the case of the FP7 CPU unit,
the station no. is specified in the FPWIN GR7 configuration menu.
• When the receiver is FP7, specify "01" (ASCII code: H3031). The receiver to which you want
to connect is specified by IP address.
(3) Text
The content of this varies depending on the type of command. The content should be noted in
all upper-case characters, following the fixed formula.
(4) Check code
• This is a BCC (block check code) for error detection using horizontal parity. The BCC should
be created so that it targets all of the text data from the header to the last text character.
• The BCC starts from the header and checks each character in sequence, using the
exclusive OR operation, and replaces the final result with character text. It is normally part of
the calculation program and is created automatically.
• By entering "**" (ASCII code: H2A2A) instead of BCC, you can omit BCC.
(5) Terminator (end code)
Messages must always end with a “CR” (ASCII code: H0D).
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