Mitsubishi MELSEC-F User Manual page 97

5 COMMUNICATION PROCEDURE
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(3) Fixed buffer
(connection numbers 1 to 8; BFM#32 to 39 b0)
(a) Here it is selected whether the fixed buffer corresponding to each applicable
connection number will be used for sending or receiving when
communicating using the fixed buffers.
Name of setting
Send
Receive
(b) When both sending and receiving are performed with an external device
using fixed buffer communication, one buffer for sending and one for
receiving are required. Thus, two connections should be set.
(c) Whether the fixed buffers are set for sending or receiving, external devices
can communicate using MC protocol.
(4) Fixed buffer communication
(connection numbers 1 to 8; BFM#32 to 39 b9 to b10)
(a) For this item, select the communication method when communicating using
the fixed buffers.
Name of setting
Procedure exist
Procedure exist (MC)
No procedure
(b) When communicating using MC protocol, adjust the setting of the fixed
buffer communication procedure to [Procedure exist (MC)].
In the settings other than [Procedure exist (MC)], communication using MC
protocol cannot be performed.
For sending or fixed buffer communication is not executed.
For receiving.
• In fixed buffer communication, data is communicated in 1:1 by handshaking with the
external device.
• In fixed buffer communication, 1:1 data communication is performed by handshaking
with the external device.
• Communication using MC protocol can be performed.
• The no procedure fixed buffer communication uses dedicated connections.
• The PLC and external devices communicate data in 1:1
• The handshaking with an external device must be performed using a sequence
program.
MELSEC-F
Description of setting
Description of setting
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