Flow Of Operation - Mitsubishi Electric MELSEC iQ-R Series User Manual

Flow of operation

This section describes the flow of the operation of the I/O communication with the master node.
Starting the I/O communication with 'I/O communication request' (Y11)
'Module READY' (X0F)
'Auto configuration request' (Y15)
'Request for saving/clearing
parameters to Flash ROM' (Y17)
'I/O communication request' (Y11)
'I/O communicating' (X01)
'Slave function error set signal'
(X08)
'Slave function error information'
(Un\G1537)
'Slave function receive size setting'
(Un\G1550),
'Slave function transmit size setting'
(Un\G1551)
'Data consistency dedicated
instruction setting' for slave function
(Un\G1587, bit 1)
'Slave function receive data'
(Un\G2816 to Un\G2879)
'Slave function transmit data'
(Un\G3072 to Un\G3135)
(1) MOV/TO instruction
(2) Parameter check
(3) MOV/FROM instruction
(4) MOV/FROM instruction, DNTSRD, or M+RJ71DN91_SlaveRead
(5) MOV/TO instruction, DNTSWR, or M+RJ71DN91_SlaveWrite
 Set the following items.
• Set the parameter in 'Slave function receive size setting' (Un\G1550) and 'Slave function transmit size setting' (Un\G1551).
• Set whether to enable or disable the data consistency dedicated instruction with 'Data consistency dedicated instruction setting' (Un\G1587.1) for the slave
function.
 Set the default value of the ON/OFF information that is to be transmitted to the master node to 'Slave function transmit data' (Un\G3072 to Un\G3135)
 Turn off 'Auto configuration request' (Y15) and 'Request for saving/clearing parameters to Flash ROM' (Y17).
 When 'I/O communication request' (Y11) is turned on, the parameter is checked.
 When the parameter check normally completes, the I/O communication with the master node starts and 'I/O communicating' (X01) turns on. However, the
node is at connection establishment waiting status until the I/O communication request is transmitted from the master function.
• The transmit data from the master node is stored in 'Slave function receive data' (Un\G2816 to Un\G2879).
• Set the ON/OFF information that is to be transmitted to the master node to 'Slave function transmit data' (Un\G3072 to Un\G3135).
 When the parameter check abnormally completes, an error occurs and 'Slave function error set signal' (X08) turns on. 'I/O communicating' (X01) does not
turn on at this time. Check the error code with the module diagnostics, 'Slave function error information' (Un\G1537), or 'Slave function communication error
information' (Un\G1153), and correct the error.
 When 'I/O communication request' (Y11) is turned off, the I/O communication with the master node stops and 'I/O communicating' (X01) turns off.
ON
OFF
OFF Ô
OFF Ô
OFF
OFF
OFF
Ò
(1)
Ò
(1)
Ó
(1)
Õ
ON
Ö
ON
×
ON
(3)
(2)
1.3 Slave Function (I/O Communication)
Ø
OFF
OFF
(4)
(5)
1 FUNCTIONS
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