Mitsubishi QJ71C24N User Manual page 386

APPENDIXES
App. - 13
(b) Command message and response message
1) The message format used in the data communication using the A
compatible 1C frame is the same as the message format of UC24/C24-S8.
2) Check available commands and devices that can be accessed in the
Reference Manual, and access the programmable controller CPU from
the external device.
3) For the QCPU, only read/write of device memory is possible.
For the range of devices that can be accessed, see the Reference
Manual.
The devices added to the QCPU, i.e. the latch relay (L), step relay
(S), and file register (R) devices, are accessed using commands for
QnA compatible 2C/3C/4C frames. It is necessary to create new
programs.
(c) Accessing other stations
1) When accessing other station's programmable controller CPU via the
MELSECNET/10, "Valid module during other station access" must be
designated in the parameter setting by GX Developer.
2) Check the stations that can be accessed in the Reference Manual, and
access the programmable controller CPU from the external device.
3) When it is necessary to access other stations on other MELSECNET/10,
data communication must be performed in a QnA compatible 3C/4C
frame.
Create a new program for the external device side according to the
Reference Manual.
4) It is not possible to access other stations via the MELSECNET(II)/B.
(d) Transmitting data to the external device by the on-demand function
1) The program for data transmission on the programmable controller CPU
side is different from when UC24/C24-S8 is used.
Create a new program on the programmable controller CPU side
according to the Reference Manual.
2) Data to be sent to the external device is identical to when the UC24/C24-
S8 is used.
(3) Data communication using the non procedure protocol
(a) Data transmission/reception
1) The same data transmission/reception as used by UC24/C24-S8 can be
performed.
2) Create a new program for data communication upon checking functions
and instructions used on the programmable controller CPU side in
Chapter 6 of this manual and the User's Manual (Application).
Data transmission/reception is performed using dedicated instructions.
MELSEC-Q
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