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16
Description of Safety Functions
Section 1-4
The status is treated as normal when both channels are normal. If an error is
detected for one channel, the safety output data and the individual safety out-
put status will turn OFF for both channels.
Error Recovery
All conditions below are necessary to recover from an error that has occurred
in a safety output.
• The cause of the error must be removed.
• Error latch time must have passed.
• The output signals to the output I/O tags from the user application that
correspond to the safety output must go inactive.
1-4-4
I/O Status Data
In addition to I/O data, the DST1-series Safety I/O Terminals support status
data to check the I/O circuits. The status data includes the following data, for
which remote I/O communications can be performed.
• Normal Flags (ON when there is no faults in the internal circuit and the
external wiring)
• An AND Flag of the Normal Flags
• Output monitors (the actual output ON/OFF status)
Normal Flags
Normal Flags indicates whether each safety input, safety output, or test output
is normal (normal status: ON, error status: OFF).
OUT0
ON
OFF
ON
OFF
Status of safety
outputs 0 and 1
ON
OFF
Remote
I/O data
OUT1
* Normal
OUT0
ON
OFF
ON
OFF
Status of safety
outputs 0 and 1
ON
OFF
Remote
I/O data
OUT1
Error
* Error
Содержание DST1-ID12SL-1
Страница 1: ...OPERATION MANUAL Cat No Z904 E1 06 DeviceNet Safety DST1 series Safety I O Terminals...
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Страница 3: ...DST1 series Safety I O Terminals Operation Manual Revised June 2011...
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Страница 110: ...86 Remote I O Allocations Section 3 2...
Страница 116: ...92 Indicators Section 4 2...
Страница 134: ...110 DST1 XD0808SL 1 Section 5 4...
Страница 146: ...122 Maintenance Section 7 4...
Страница 159: ...135 Logic Terminal Wiring Examples Section 8 3...
Страница 160: ...136 Logic Terminal Wiring Examples Section 8 3...
Страница 178: ...154 Index...
Страница 181: ...157 Revision History...