Mitsubishi Melsec-L Series User Manual page 178

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POINT
(1) The position and size of the transmission area in the buffer memory can be
changed with GX Works2 in accordance with the specifications of the external
device and the received data length.
(a) When changing the position and size of the transmission area in the buffer
memory with GX Works2, specify as follows:
1) [Various_Control_Specification] screen
transmission area"
designation"
Designate the starting address for the area to be used as the
transmission area in the setting area (address: 400
to 3FFF
H
2) [Various_Control_Specification] screen
transmission area"
designation"
Designate by addresses the length of the area (0001
used as the transmission area in the setting area (address: 400
1AFF , 2600
H
(b) When changing the position and size of the receive area in the buffer
memory, if any of the functions below are used concurrently, make sure
that the addresses of the transmission area do not overlap with the buffer
memory addresses assigned for storing transmission/receive data with the
functions.
1) MC protocol buffer memory read/write function
2) MC protocol on-demand function
3) Predefined protocol function (transmission/reception data storage
area)
4) Nonprocedural protocol transmission/receive function
5) Bidirectional protocol transmission/receive function
6) Communication data monitoring function
(2) Set the size of data per data transmission from the CPU module to the external
device so that it is smaller than the size of the transmission data designated
area in the buffer memory.
(Transmission data designation area) ≥ (Size of arbitrary data portion to be
To transmit data whose size is larger than the transmission data designation area,
increase the transmission area, or divide the transmission data before sending.
10 DATA COMMUNICATION USING THE NONPROCEDURAL PROTOCOL
"Transmission buffer memory head address
).
"Transmission buffer memory length
to 3FFF ).
H H
"For designation of
to 1AFF
H
"For designation of
H
sent from the CPU module)
, 2600
H H
to 1A00 ) to be
H
to
H
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