Mitsubishi Electric MELSEC iQ-R Series User Manual page 377

 The master station transmits a permission response to the slave station that issued the communications request.
Ex.
Massage of Ò
Target device of
slave station that
wants to obtain the
line ownership
(1CH)
(;) (1B) (1C)
3BH 31H 42H 31H 43H 5AH 58H
Master (1BH)
station
target device
Master ×
(Before )
station
Õ
Target device
(Station No.:1BH)
×
(Station No.:0H) (Station No.:1H)
CPU C24 CPU
 The slave station that received the permission response performs the processing from  after communicating data with
the CPU module within the maximum data communication time arranged among the target devices.
 The master station that transmitted the permission response and the slave stations that does not obtain line ownership
check the line usage time of the slave station that obtained the line ownership, and ignore the received data not addressed to
their own station.
If the line usage time exceeds the maximum communication time, each target device performs the processing .
 The slave station that has communicated data with the CPU module transmits a communication complete report to the
master station after data communications completed. A message structure example is shown in .
Slave stations that do not communicate data with the CPU module check if a communications complete report was
transmitted, and do not communicate data with the master station during that time.
*1
*1 Command "ZX" is a communications
request command for description purpose.
The user should select the command that
requests communications.
(ZX) (2) (CB)
32H 43H 42H
(:) (1B) (1C)
3AH 31H 42H 31H 43H
Massage of Ó
×
(After )
Target device
(Station No.:1CH)
Ö Ô
(Station No.:2H)
C24 CPU
18 DATA COMMUNICATIONS BETWEEN TARGET DEVICE AND CPU MODULE IN M:N BASIS
18.3 Examples of Procedure for Data Communications with CPU Module
(Y)
59H
Target device
(Station No.:1DH)
C24
Target device that obtained the line ownership
The above C24 includes Q series C24, L series C24, QC24(N), and UC24.
Õ Õ
Target device
(Station No.:1EH)
(Station No.:15H)
CPU C24
18
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