Mitsubishi MELSEC LJ71C24, User Manual

Page: 29 / 428

3 - 1 3 - 1
3 SPECIFICATIONS
3 SPECIFICATIONS
This chapter explains the general specifications, performance specifications, function
list, and I/O signals.
3.1 General Specifications
For the general specifications of C24, refer to "Safety Guidelines", the manual supplied
with the CPU module or head module.
The latest manuals in PDF can be downloaded from the MELFANSweb.
3.2 Performance Specifications
The following shows the C24 performance specifications.
For the transmission specifications when communicating via the modem function, refer
to both Section 3.2. and User's Manual (Application).
(1) Transmission specification
Model name
Item
LJ71C24 LJ71C24-R2
CH1
RS-232-compliance
(D-sub 9 pin female)
RS-232-compliance
(D-sub 9 pin female)
Interface
CH2
RS-422/485-compliance
(2-piece terminal block)
RS-232-compliance
(D-sub 9 pin female)
Line ( 1) Full-duplex/half-duplex communications
MC protocol communication Half-duplex communications
Predefined protocol
communication
Full-duplex/half-duplex communications
Nonprocedural protocol
communication
Full-duplex/half-duplex communications
Communication
system
Bidirectional protocol
communication
Full-duplex/half-duplex communications
Synchronization method Start-stop synchronization method
50 300 600 1200 2400 4800 9600
14400 19200 28800 38400 57600 115200 230400 (bps)
Transmission speed
•
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.
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 the END processing of the CPU module of the station with the C24.
Number of scans that must be processed/number of link scans depends on the contents of the request.
(Refer to the MELSEC-Q/L MELSEC Communication Protocol Reference Manual)
Predefined protocol
communication
Sends or receives data when requested with the dedicated instruction (CPRTCL).
Access cycle
Nonprocedural protocol
communication,
Bidirectional protocol
communication
Sends each time a send request is issued. Can receive at any time.
(Continued on next page)
3