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MELSEC-Q
3 SPECIFICATIONS
3 SPECIFICATIONS
The following shows the Q series C24 performance specifications.
For general specifications, refer to the QCPU User's Manual (Hardware Design,
Maintenance and Inspection).
3.1 Performance Specifications
The following shows the Q series C24 performance specifications. For the
transmission specifications when communicating via the modem function, see this
section and User's Manual (Application).
(1) Transmission specification
Specifications
Item
QJ71C24N
QJ71C24
QJ71C24N-R2
QJ71C24-R2
QJ71C24N-R4
CH1
RS-232-compliance
(D-sub 9 pin)
RS-232-compliance
(D-sub 9 pin)
RS-422/485-compliance
(2-piece plug-in connector socket
block)
Interface
CH2
RS-422/485-compliance
(2-piece terminal block)
RS-232-compliance
(D-sub 9 pin)
RS-422/485-compliance
(2-piece plug-in connector socket
block)
Line Full-duplex/half-duplex communications
MC protocols
communication
Half-duplex communications
Non procedure protocol
communication
Full-duplex/half-duplex communications
Bidirectional protocol
communication
Full-duplex/half-duplex communications
Communications
system (
1)
Pre-defined protocol
communication (
6)
Full-duplex/half-duplex communications
Synchronization method Start-stop synchronization method
[QJ71C24N(-R2/R4)]
50 300 600 1200 2400 4800 9600
14400 19200 28800 38400 57600 115200 230400 (bps)
• Transmission speed 230400 bps is available for only CH1. (Not available for CH2)
• Total transmission speed of two interfaces is available up to 230400 bps.
• Total transmission speed of two interfaces is available up to 115200 bps when the communication data
monitoring function is used.
[QJ71C24(-R2)]
50 300 600 1200 2400 4800 9600
14400 19200 28800 38400 57600 115200 - (bps)
Transmission speed
• Total transmission speed of two interfaces is available up to 115200 bps.
Start bits 1
Data bits 7/8
Parity bits 1 (vertical parity) or none
Data format
Stop bits 1/2
MC protocol communication
Processes one request during installed programmable controller CPU END processing.
Number of scans that must be processed/number of link scans depends on the contents of the request.
(See Reference Manual.)
Non procedure protocol
communication
Bidirectional protocol
communication
Sends each time a send request is issued. Can receive at any time.
Access cycle
Pre-defined protocol
communication (
6)
Sends or receives data when requested with the dedicated instruction (CPRTCL).
Parity check Selected for all protocols and when this check is enabled, ODD or EVEN is selected by a parameter.
Error detection
Sum check code
For the MC or bidirectional protocol, selected by a parameter.
For the non procedure protocol, selected in the user frame.
For the pre-defined protocol, whether or not a sum check code is needed depends on the selected
protocol. (
6)
(Continued on next page)
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