Yokogawa Value Series FX1000 - Manual (Page 16)

1-7
IM 04L21B01-01EN
Overview of Functions
3
2
1
4
5
6
7
8
9
10
11
12
13
14
App
Index
Alarm Output Relay Operation
The FX can generate a contact signal from an alarm output relay (/A[ ] and /A4A options)
when an alarm occurs. The alarm output relay operation can be changed.
For the setting procedure, see section 3.5.
Alarm
Alarm output relay
(Reflash on)
Alarm output relay
(Reflash off)
Channel 1
Channel 3
Channel 2
Energize or De-energize
AND/OR
Alarm
Channel 1
AND
Channel 2
OR
Alarm output relay
or
internal switch
NO
Energize
De-energize
C NC NO C NC NO C NC
NO C NC NO C NC NO C NC
When power
is shut down
NO: Normally Opened
C: Common
NC: Normally Closed
Normal
operation
When an alarm
is occurring
Alarm
Normal
Alarm
Normal
Reflash
(You can set AND/OR for the alarm output relay and internal
switch. For details about the internal switch, see the next
page.)
(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
or
Activated
Deactivated
or
Display
Alarm
Hold
Non-hold
Alarm output relay
Hold
Non-hold
Hold
Non-hold
Non-hold/Hold
Relay is activated
at the next scan
interval.
Relay is activated
when the next
alarm occurs.
Alarm ACK Alarm ACK
500 ms
• Reflash
When multiple alarms are assigned to one alarm output relay, this function notifies the
occurrence of subsequent alarms after the relay is activated by the first alarm. When
subsequent alarms occur, the output relay is released temporarily. The relays are
deactivated for 500 ms.
The reflash function is set on the first three output relays * .
* I01 to I03. I01 and I02 for the /A1 option.
Note
When reflash is enabled, the first three output relays are used exclusively as reflash relays. The
first three output relays are set to OR logic and non-hold operation regardless of the AND/OR
and non-hold/hold settings explained below.
• AND/OR
When multiple alarms are assigned to one alarm output relay, the condition for
activating the output relay can be selected from the following: You can select AND
operation also for the internal switch.
• AND: Activated when all assigned alarms are occurring simultaneously.
• OR: Activated when any of the specified alarms is occurring.
1.2 Alarms