Panasonic AFPX-C30R User Manual page 127

7.1.2 Functions of Communication Cassette
With the communication cassette, the FP-X offers four different communication modes as below.
Computer link
• The computer link function is to communicate between a computer and PLCs or between PLC and
external devices connected. A proprietary MEWNET protocol called MEWTOCOL-COM is used for
communicating with the computer link. MEWTOCOL-COM is also used for the communication between
the tool software such as FPWIN-GR and the PLC.
• There are a MEWTOCOL master function and a MEWTOCOL slave function for the computer link. The
side that issues commands is called master, and the side that receives the commands, executes the
process and sends back responses is called slave.
Note:
It is necessary to set the system register of the communication port to the computer link for using this
function.
1. Only the slave function is available for the FP-X relay type Ver1.20 or former version.
2. Both the master and slave functions are available for the FP-X transistor type and relay type Ver1.21
or later version, however, the master function is not available for the TOOL port.
MEWTOCOL master function (Transistor type and relay type Ver1.21 or later version)
• This function is to carry out the communication on the master side (side 0that issues commands) of the
computer link. It is executed with the PLC's instruction F145(SEND) or F146(RECV). It is not necessary
to write the response process as a ladder, so the program is easier than the general-purpose
communication function.
The 1:1 or 1:N communication is available between our devices equipped with the computer link function
and the MEWTOCOL-COM.
[Our devices (e.g.)] : PLC, IPD, temperature control unit, eco-power meter
For the MEWTOCOL master function, communication is possible with the COM1 and COM2 ports only.
Do not execute the F145 (SEND) nor F146 (RECV) instructions when the unit is used as a slave unit.
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