1-79
IM 04L51B01-01EN
Configuring the GX/GP and Viewing the Settings
1
DO Output Relay Operation
The DO output relay operation is shown below.
Alarm
DO output relay
(Reflash on)
DO output relay
(Reflash off)
Channel 1
Channel 3
Channel 2
500 ms, 1 s, 2 s
Energize or De-energize
AND/OR
Alarm
Channel 1
AND
Channel 2
OR
DO output relay
or
Internal switch
NO
Energize
De-energize
C NC NO C NC NO C NC
NO C NC NO C NCNO C NC
When power is
shut down
NO: Normally Opened
C: Common
Normal
operation
When an alarm
is occurring
Alarm
Normal
Alarm
Normal
Reflash
(You can set AND/OR for the DO output relay and
internal switch.)
(when a relay is set to OR logic)
Normal
Reset
Relay action on ACK
Relay action on ACK
occurrence
Activated
Deactivated
Activated
Deactivated
Activated
Deactivated
release
Activated
Deactivated
Display Alarm
Hold
Non-hold
DO output relay
Hold
Non-hold
Hold
Non-hold
Non-hold/Hold
Relay is activated
after 100 ms.
Relay is deactivated
until the next
alarm occurs.
Alarm ACKAlarm ACK
DOOutputRelayOperationduringanError
When an error (FAIL) occurs in the system, the DO output relay is de-energized (as shown
below). The DO output relay operation is shown below.
Item Description
When a CPU error occurs in the GX/GP The DO output relay of the GX/GP is de-energized.
The DO output relays of all expandable I/Os are
de-energized.
When a CPU error occurs in an expansion module The DO output relays of the GX/GP and
expandable I/Os in which errors are not occurring
continue normal operation.
The DO output relay of the expandable I/O in
which the error occurred is de-energized.
When a connection between expandable I/Os are
disconnected
The DO output relay of the GX/GP continues
normal operation.
The DO output relays of the expandable I/O that
was disconnected and those of subsequent units
are de-energized.
Normal operation resumes when the connection
recovers.
1.6ConfiguringDOChannels(Digitaloutputchannels)
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