Mitsubishi MELSEC-Q Series User Manual page 93

4 FUNCTIONS
4 - 51
Content of buffer memory size specification for intelligent device station
Send buffer
Receive buffer
Automatic update buffer
POINT
(1) If an automatic CC-Link startup is performed on a system that includes a local
station, the local station will occupy one station during operation.
(2) Make sure to perform line tests for all stations if an automatic CC-Link startup is
performed and changes such as replacement of a module, etc. are made to the
system during data link operation.
Stations whose data link has already been established (only stations whose
station numbers overlap) may also go down if stations with overlapping head
station numbers return to the system.
(3) If an automatic CC-Link startup was performed, a temporary error invalid
station cannot be used.
(4) In case of a multiple PLC system where each CPU controls several QJ61BT11
modules, the automatic CC-Link startup is performed on the QJ61BT11 that
has the smallest head I/O number.
(2) Execution conditions
(a) When the parameters are not set, the automatic CC-Link startup function is
applicable only to one "QJ61BT11". Even when more than one QJ61BT11
is mounted on the base unit, the automatic CC-Link startup function is
applicable only to the first one. It is applied to the QJ61BT11 that has the
smallest start I/O number, as seen from the PLC CPU side.
(b) When performing an automatic CC-Link startup without setting the
parameters, up to three MELSECNET/10H modules can be used on the
master station CPU.
MELSEC-Q
64 words
64 words
128 words
4 - 51