26
Timing chart for CH2 using
Sending
Data WRITE from PLC CPU to SCU shared memory, and
Y12 (R1.2)
on/off setting should be performed by ladder program.
Receiving
Data READ with PLC CPU from SCU shared memory, and
Y13 (R1.3)
on/off setting should be performed by ladder program.
Sending
X2 (R0.2)
Read from SCU
shared memory
to SCU CPU, and
send it to the external device
Data
BUFFER CLEAR
Data
Write data from PLC CPU
to SCU shared memory.
SCU
starts
Perform
with ladder
program
Y12 (R1.2)
Receiving
X3 (R0.3)
Data
BUFFER CLEAR
Data
SCU
starts
Perform
with ladder
program
Y13 (R1.3)
Read SCU shared memory
data with PLC CPU unit
Save data from
the external device
to shared memory.
