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MELSEC-Q
APPENDIX
Function Q series C24 QC24N QC24 UC24 C24-S8
Accessing other stations with link dedicated instructions (via QC24 (N))
Non procedure protocol
Interrupt processing
(at data reception)
Bidirectional protocol
Communication via public lines using modem function
Communication using the PLC CPU monitoring function
Auto refresh directed to the PLC CPU
DC code control
Transmission control
DTR/DSR signal control
Half-duplex communication control
Mode switching
Setting the same protocol
Independent operation of two
interfaces
Setting different protocols
Linked operation of two interfaces
Registering initial setting values of the buffer memory
Registering user frame
(Flash ROM) (EEPROM)
1:1, 1:n
Connection forms with external
devices
m:n
I/O signal transmission/receive by multi drop link function
Connection of GX Developer
Communication data monitoring
Registering and monitoring of setting values by the utility package
PLC that can be mounted
QCPU
MELSECNET/H
remote I/O station
QnACPU
MELSECNET/10,
Remote I/O station
ACPU
AnACPU
AnUCPU
QnACPU
ACPU
AnACPU
AnUCPU
QnACPU
Data transmission rate (bps)
230400 maximum
(
6)
115200
maximum
19200
maximum
19200
maximum
19200
maximum
: Function exists/possible
:
Function exists/possible
(specification is different
depends on the function
version (see Appendix 1)
: No function/impossible
1 Access is possible only within the range of an AnACPU device.
2 A multiple block batch read/write function can be used for the local station QCPU to which the Q series
C24 is mounted and the next CPU module, which will be another station, via MELSECNET/H,
MELSECNET/10.
PLC CPU
Function
QCPU QnACPU Q2AS(H) Q4AR
Multiple block batch read/write (All allowed) (9707B or later products) (All allowed)
This function is added to modules showing 9707B or later in the package indication and the DATE
column of the rating plate.
3 Access to other stations cannot be performed via data link system (MELSECNET(II), MELSECNET/B).
4 Transmission is only possible using the printer function.
5 When the Q series C24 is used, it is possible to read/write a maximum of 960 words (in case of QC24(N), it
is possible to read/write a maximum of 480 words.)
6 230400 bps can be used via CH1 of QJ71C24N (-R2/R4) only.
The maximum transmission speed of QJ71C24 (-R2) is 115200 bps.