Number Of Output On Times Integration Function - Mitsubishi Electric MELSEC iQ-RX40NC6B Application User's Manual

Number of output ON times integration function

This function counts the number of times that an output from the CPU module turns on.
When the number of output ON times alarm detection count has been set and the number of output ON times reaches the set
value, an alarm occurs.
This function helps predict the life of external connected devices.
Number of output ON times integration
The output module with diagnostic functions counts the number of times that an output turns on in the range from 0 to
4294967295.
When the number of output ON times exceeds the maximum value, the count stops. To continue the count, clear the number
of output ON times with 'Number of output ON times value clear request' (Un\G3840). (The count starts from 0.)
The number of output ON times is counted for each external output. Only for the output for which "Output ON number count
function enable/disable" is set to "Enable", the number of output ON times is counted.
The number of output ON times is stored in 'Number of output ON times' (Un\G3136 to Un\G3167).
• The number of output ON times is recorded in the non-volatile memory of the output module with diagnostic
functions every second and at power-off. The number of output ON times recorded in the non-volatile
memory is restored in 'Number of output ON times' (Un\G3136 to Un\G3167) when the power is turned on
or the CPU module is reset. Therefore, the number of output ON times is held even if the power is turned off
or the CPU module is reset.
■Operation of the number of output ON times integration function
The following figure shows an operation example of the number of output ON times integration function.
Output from the CPU module (Y1)
Output in the module (Y1)
'Number of output ON times'
(Un\G3138 to Un\G3139)
: END processing of the CPU module
1 FUNCTIONS
36
1.2 Output Function
ON
OFF
ON
OFF
0 1 2 3 4