User`s manual

266
11.2.3 Receive procedure
The following shows the receive procedure when a message, including data with the same arrangement as the
specified user frame, is received and the arbitrary data is read to the programmable controller CPU.
(When the CH1 side interface of the Q series C24 receives data)
*1 See Page 254, Section 11.2.1 and Page 267, Section 11.2.4 regarding the reading of reception data using a user frame
and the timing of reception data reading to the programmable controller CPU.
*2 Sets the receive user frame registration No., etc. in the "non procedure system setting" screen for GX Configurator-SC.
During debugging, the initial setting value for data reception shall be set prior to data receiving, but after debugging is
completed, it shall be set when the Q series C24 starts up. ( Page 267, Section 11.2.4)
*3 Reading (1) below) for checking which user frame was received by the Q series C24 from the programmable controller
CPU and reading of the receive data (2) below).
1) Reads which of the user frames set in the receiver user frame designation area was received from the receive user
frame storage area (address: 25BH).
2) Reads the arbitrary data area of the receive message from the receive area (default addresses: 600H to 7FFH).
(*1)
X3
ON
External device
side
Programmable
controller CPU
side
(*2)
Completion device
Reception data
read request signal
INPUT
Status display device
at completion
User frame
(first frame)
Arbitrary
data area
User frame
(last frame)
FROM
(
*3
1))
Reception data with the user frame
(*1)
Programmable
controller CPU
side
(
*3
2))
Abnormal
ON completion
Normal
completion
1 scan