Details of I/O signal common in the master function and the slave
function
Watchdog timer error (X00)
This signal turns on when a hardware failure occurs on the RJ71DN91.
• Off: Module normal
• On: Module failure
'Watchdog timer error' (X00)
'Module READY' (X0F)
I/O communicating (X01), I/O communication request (Y11)
Use this signal when starting the I/O communication with each slave node.
Execute while 'Module READY' (X0F) is on.
■When starting the I/O communication by 'I/O communication request' (Y11)
• When 'I/O communication request' (Y11) is turned on, the parameter is checked.
• When the parameter check normally completes, the I/O communication with each slave node starts and 'I/O
communicating' (X01) turns on.
• When the parameter check abnormally completes, the ERR LED turns on and 'Master function error set signal' (X03) or
'Slave function error set signal' (X08) turns on. 'I/O communicating' (X01) does not turn on at this time. For details on
'Master function error set signal' (X03) and 'Slave function error set signal' (X08), refer to the following.
Page 67 For master function error (X03), (Y13)
Page 69 For slave function error (X08), (Y18)
• When 'I/O communication request' (Y11) is turned off, the I/O communication with each slave node stops and 'I/O
communicating' (X01) turns off.
When parameter check normally completes
'Module READY' (X0F)
'I/O communication request' (Y11)
'I/O communicating' (X01)
(1) Parameter check
APPX
70
Appendix 2 I/O Signals
ON
OFF
OFF
ON
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
(1)
OFF
OFF