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MELSEC-Q
4 SETTINGS AND PROCEDURES PRIOR TO OPERATION
(b) Do not use the above settings for the following cases, because linked
operation cannot be performed.
1) When using the QJ71C24N-R2 or QJ71C24-R2.
2) When an external device is not connected to either of the interfaces.
3) When the bidirectional protocol is used for data communication.
4) When communicating data with an external device connected to two
interfaces that are not interacting, using functions set in the
communication protocol settings (MC protocol/non procedure protocol).
5) When communicating data using the modem function.
POINT
When two interfaces are in linked operation, the transmission time for one
character becomes equal to the hardware gate off time of the Q series C24.
(c) The data flow in linked operation is as follows.
1) Two interfaces operate linked together using functions defined with the
communication protocol setting on the CH2 side (MC protocol in the
same format or a non procedure protocol) within the transmission
specifications set in the respective transmission settings (specifications
for CH1 and CH2 must be the same).
CH2
Q series C24 (data flow in linked operation)
*
CH1
CH2
CH1
2ch
1ch
Transmits only
to a designated
CH side.