Mitsubishi MELSEC LJ71C24, User Manual

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3 SPECIFICATIONS
3.3.2 Additional functions
The following shows the additional functions of the C24.
The following abbreviations appear in the protocol column of the function list.
MC: MC protocol
Pd: Predefined protocol
Non: Nonprocedural protocol
Bi: Bidirectional protocol
( : Applicable protocol)
Protocol
Function Description
MC Non Bi Pd
Reference
Executes the communication with QnA compatible
2C/3C/4C frames.
Communication with ASCII code
Executes the communication with an A compatible 1C
frame.
Communication with binary code
Executes the communication with a QnA compatible
4C frame.
Monitoring CPU modules
(Programmable controller CPU
monitoring function)
Monitors the operating status of CPU modules and the
data in the device memory.
The CPU module status and the device memory data
can be sent to the external device at fixed intervals,
when an error occurs in the machine equipment, or
when certain conditions are satisfied.
Turning on/off input signals of the
C24 from an external device (global
function)
Turns on/off input signals of the C24 from an external
device.
Data transmission from a CPU
module to an external device (on-
demand function) Data can be sent from the programmable controller
CPU to the external devices in each frame format of
the MC protocol.
Chapter 8,
MELSEC-Q/L
MELSEC
Communication
Protocol
Reference
Manual
Data transmission/reception by the
user frame
Registers the fixed format portion of messages sent
and received between C24 and an external device in
the module. That portion can be used when sending
and receiving data.
Data reception by interrupt
programs
To make the data reception faster, reads the reception
data by interrupt programs.
ASCII data transmission/reception
by ASCII-BIN conversion
Communication can be made with ASCII code data
since the C24 executes ASCII-BIN conversion.
Data transmission/reception by
specifying transparent code
In data communication with external devices, one-byte
data for transmission control of the external device
side can be sent/received as an user data.
User's manual
(Application)
Communication via public network,
etc.
(Modem function)
Data communication is performed via public line with a
remotely located external device.
Data communication with MC protocol, nonprocedural
protocol, and bidirectional protocol are available.
User's manual
(Application)