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7-2-2
Monitoring the Run Hours
Description
A DST1-series Safety I/O Terminal totals the number of hours the internal circuit power is supplied and in-
ternally saves it in non-volatile memory. If the cumulative time reaches the set threshold value, the Unit Main-
tenance Flag will turn ON in the General Status.
•
Measurement time: 0 to 429,496,729.5 hours (stored data: 0000 0000 to FFFF FFFF hex)
•
Measurement unit: 0.1 hour
The user can monitor this information using the Network Configurator and explicit messages.
Note: – The run hours monitoring function totals the time when the power supply to the DST1-series Safety
I/O Terminal (network power) is ON. This does not include the time when the power is OFF.
– The DST1-series Safety I/O Terminals measure time internally in 0.1-hour increments. When the
Threshold Run Hours parameter is set on the Network Configurator and when the run hours are
monitored, however, the time will be in 1-hour increments.
Setting the Threshold Run Hours Using the Network Configurator
Set the threshold value in the Threshold Run hours Field of the General Parameter Group.
If the threshold value is set to 0, the threshold value will not be checked.
120
Safety I/O Terminal
Run hours
DeviceNet
Recorded in Slave
Run hours
Internal circuit
power
Section 7: Monitoring Devices
ON
OFF
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