Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 182)

4-22
IM 04L31A01-01E
Setup Items
Setting Control Alarms
• Loop number
The setup items for control alarms are set for each loop. When changing these
parameters, this setting is used to select the target loop number [1] to [6] (initial value
is 1). The loop number is displayed up to the number of loops you specified at the
time of purchase.
• Off/On
Up to four alarms can be registered per loop. Set only the alarms that are to be used to [On].
• Type
Select the type of alarm from the following. Displayed symbols are indicated in parentheses.
PV high-limit alarm (PVH), PV low-limit alarm (PVL), deviation high-limit alarm (DVH),
deviation low-limit alarm (DVL), deviation high & low limit alarm (DVO), deviation
within high & low limits alarm (DVI), SP high-limit alarm (SPH), SP low-limit alarm
(SPL), output high-limit alarm (OTH), and output low-limit alarm (OTL).
• Standby
This setting is valid when [Type] is set to [PV-High], [PV-Low], [Deviation-High],
[Deviation-Low], [Deviation-H&L], or [Dev-within-H&L]. Set whether to standby ([On]
or [Off]).
• Relay Output/Number
Up to four alarms can be registered per control loop. For each alarm, turn ON/OFF
the relay output and select the contact output number when using relay output from
the list below. For example, [DO001] to [DO006] and [RO001] to [RO012] are
available selections of contact output numbers for the control alarm of loop 1.
DO001 to DO006: Loop 1 and 2 control output terminal block
DO101 to DO106: Loop 3 and 4 control output terminal block
DO201 to DO206: Loop 5 and 6 control output terminal block
RO001 to RO012: Control DIO expansion terminal block
SW001 to SW036: Internal switch (Style number S3 or later)
Note
The contact output is output from the terminal indicated as [DIGITAL OUT] on the label on the
back of the terminal cover. For the relationship between the contact output numbers and the
[DIGITAL OUT] terminals of each terminal block, see
page 2-6 .
• Action
Indicates whether the relay output is energized or de-energized according to the
[Relay(Action/Behavior)] setting under [Control] > [Relay] (see page 4-12).
• SP number/Alarm value
The control alarm outputs correspond to SP numbers [1] to [8]. Select the SP number
[1] to [8] and register alarm values for the four alarms of each SP number. The selectable
alarm values vary depending on the specified [Type] (alarm type) as follows:
PV high/low limits, SP high/low limits: EU of measurement span (0.0 to 100%)
Deviation high/low limits: EUS of measurement span (–100 to 100%)
Deviation high/low limits, within deviation high and low limits: EUS of measurement
span (0.0 to 100%)
Output value alarm: –5.0% to 105.0%
Clearing Alarms (AlarmACK)
If the [AlarmACK] operation is performed, all alarm indications and relay outputs are
cleared. However, this operation is invalid if the alarm indication/output relay behavior is
set to [Nonhold]. Alarms can be cleared using remote input (see section 11.5, “Setting
the Measurement Remote Inputs”
) or via communications (see the Communication
Interface User’s Manual ).
4.7 Control alarm