Mitsubishi Electric MELSEC iQ-RJ71C24-R2 - Intelligent Function Module Monitor

27 TROUBLESHOOTING
27.1 Checking Module Status
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Intelligent function module monitor
Check the status information of C24 on the "Intelligent Function Module Monitor" screen.
For details of the "Intelligent Function Module Monitor" screen, refer to the following manual.
GX Works3 Operating Manual
RS-232 control signal status reading method
The following shows how to read the control signal status stored in the buffer memory during communication using RS-232
interface.
This is a read operation to check the signal ON/OFF status of the RS-232 interface when a transmission problem occurs.
■RS-232 control signal status (Un\G596/612)
The RS-232 control signal status is stored as follows:
• Remarks
For details on signals for RS-232, refer to the following section.
MELSEC iQ-R Serial Communication Module User's Manual (Startup)
Signals output from the C24 side (RS(RTS) and ER(DTR)) are controlled by the system (operating system) of C24. They
cannot be directly controlled by the program.
A lag of 100 ms at maximum occurs in the signal status stored in the buffer memory above.
b0b1b2b3b4
0
0
1/0
1/0
1/01/01/0
1/01/01/0
b15 b6
1/0
1/0
1/0
1/0
1: ON
0: OFF
RS(RTS)
DR(DSR)
ER(DTR)
CD(DCD)
CS(CTS)
CI(RI)
b5
(Information on the CH1 side)
(Information on the CH2 side)
Buffer memory
a address
Un\G593
Un\G612
to