Mitsubishi QJ71C24N - Page 364

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MELSEC-Q
11 TROUBLESHOOTING
REMARKS
When the "ERR." LED is turned on, an error code is stored in the following buffer
memory.
Error Buffer memory
Switch setting error or Mode
switching error
Switch setting error and mode switching error area (address: 203H)
On-demand execution error On-demand execution result area (address: 256H/266H)
Data transmission error Data transmission result area (address: 257H/267H)
Data reception error Data reception result area (address: 258H/268H)
Modem function error Modem function error code area (address: 221H)
MC protocol transmission
error
MC protocol transmission error code (address: 25AH/26AH)
Monitoring device error Programmable controller CPU monitoring function execution result
(address: 2205
H/2305H)
Pre-defined protocol
function error
Pre-defined protocol status function error code (address: 4042H/4052H)