Panasonic AFP7CCM1, User Manual

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7.3 MEWTOCOL-COM Master Communication (RECV)
7-5

Timing chart
Confirm OFF
Execute RECV
Master communication
Sending active flag
(YC, YD, YE, YF)
Master communication
Sending done result flag
(Y0, Y1, Y2, Y3)
Sending data
Response reception
processing
Master communication
Clear to send flag
(XC, XD, XE, XF)
Confirm ON
Conditions to enable execution of RECV
instruction
Clear to send flag (XC, XD, XE, XF): ON
Sending active flag (YC, YD, YE, YF): OFF
Sending done result flag (Y0, Y1, Y2, Y3):
Normal completion: OFF
Abnormal completion: ON
Sending active flag (YC, YD, YE, YF):
Sending data: ON, Sending done: OFF

I/O allocation (For CPU Unit)
COM port no.
1 2 0
Name Explanation
XC XD XE
Master
communication Clear
to send flag Turns ON when MEWTOCOL-COM, MEWTOCOL7, or
MODBUS-RTU is set for the communication mode, and the unit
is in the RUN mode.
YC YD YE
Master
communication
Sending active flag Turns ON during sending data based on SEND/RECV
instruction.
Turns OFF when the sending process is completed.
Y0 Y1 Y2
Sending done result
flag
Reports completion result of sending data in general-purpose
communication or master communication.
(Normal completion: 0, Abnormal completion: 1)

I/O allocation (For Serial Communication Unit)
COM port no.
1 2 3 4
Name Explanation
XC XD XE XF
Master
communication
Clear to send flag Turns ON when MEWTOCOL-COM, MEWTOCOL7, or
MODBUS-RTU is set for the communication mode, and the
unit is in the RUN mode.
YC YD YE YF
Master
communication
Sending active flag Turns ON during sending data based on SEND/RECV
instruction.
Turns OFF when the sending process is completed.
Y0 Y1 Y2 Y3
Sending done result
flag
Reports completion result of sending data in genera-purpose
communication or master communication.
(Normal completion: 0, Abnormal completion: 1)
(Note 1) Each contact is used for reading the operation status. Do not write over it with a user program.
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