Mitsubishi Electric Melsec Q Series User Manual page 50

2 USING THE E-MAIL FUNCTION
Initial normal completion (X19)
Number of mails remaining
on the server
(Buffer memory address:
22640)
Mail buffer
(Buffer memory address:
9857 to)
Flag indicating whether
there are receive mails
(Buffer memory address:
9858, bit 15)
MRECV instruction
MRECV instruction
completion device
MRECV instruction
completion device + 1
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(1) Reception using the sequence program
The following explains the designation method in a sequence program.
For details, see Section 6.2.
Instruction Un\G9858.F
Read the receive
mail information
M0 M1
M1
(2) Execution timing of the instruction
Initial
Receive mail
processing confirmation
1)
Inquiry interval
0
2)
Mail 1 Mail 2
Create control data at D0 and on
E-mail is read if there is recieve mail in
Ethernet module
ZP.MRECV
Processing program when normal completion
Processing program when abnormal completion
2)
2 1
Mail 1
4)
1 scan
3)
MRECV
5)
MELSEC-Q/L
"U0" D0 D100
Inquiry interval
1 scan
6)
MRECV
Abnormal
completion
M0
Receive mail
confirmation
Mail 2
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