User`s manual

28
(b) The programmable controller CPU monitoring function can be used in
communication using MC protocol or non procedure protocol.
(c) Using the programmable controller CPU monitoring function makes it possible to do
the following:
• Sends device data without using a sequence program
• Simplifies the device monitor procedure
• Sends the programmable controller CPU error information
(2) Communicating with the external device at a remote location via a modem
( Page 69, CHAPTER 3)
(a) Connecting a modem or TA (terminal adapter) to the RS-232 interface facilitates
communication via a public line/private line/digital line (ISDN), such as data
communication with a device at a remote location (listed below) and calling a pager
device.
• Data communication using the MC protocol
• Data sending and receiving using the non procedure protocol
• Data communication using the bidirectional protocol
• Programmable controller access using the GX Developer
(b) Initialization of a modem or TA, line connection (dialing), and line disconnection are
performed by the programmable controller CPU.
MODE
RUN
ERR.
USER
BAT.
BOOT
POWER
MELSEC
PULL
MITSUBISHI
Q25HCPU
QJ71C24
CH1.
CH1.
RS-232
CH2.
RS-232
USB
Monitoring
device information
CPU error
information
External device
Abnormal detection
Error
occurrence