YOKOGAWA SC150, Инструкция по эксплуатации

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IM 12D7B4-E-H
22
5-7. Contact Output Setput
S1/S2
Each Switch (contact) has 4 functions.
When a Switch is set to off the Switch is
not used.
Control: A selection of P- PI- or PID
control
Alarm: Low or high value Limits
monitoring
Hold: A Hold contact is energized when
the instrument is in HOLD
Fail: A Fail contact is energized when
a fail situation occurs.
Fail situations are configured in
section 5-9. For SOFT Fails the
contact and the display LED are
pulsating. For HARD Fails the
contact and the display LED are
energized continuously.
The contact reacts to Hard Fails
Only
The contact reacts to Hard and
Soft Fails
Simulate: The contact can be switched
on/off or a percentage of output
can be simulated. This percentage
is a analogue value and represents
the on time per second.
5-8. Configure Hold
General
Hold is the procedure to set the outputs to
a known state when going into commissio-
ning. During commissioning HOLD is
always enabled, outputs will have a fixed or
last value. During calibration the same
HOLD function applies. For calibration, it is
up to the user if HOLD is enabled or not.
Note! When leaving Commissioning, Hold
remains active until switched off manually.
This is to avoid inappropriate actions while
setting up the measurement
Fig. 5-3. Duty cycle control
Fig. 5-4. Pulse frequency control
t (sec)
LED off
Hys.
Setpoint
LED on
Delay time Delay time
LED off
SC
Fig. 5-2. Alarm contact
100
50
0
0.3 s
90% 10%
100
50
0
on
t t
off
90% 10%
50% 50%
% of output range
% duty cycle control
Setpoint
Proportional
range
Time
Duty cycle
SC
SC
% of output range
Setpoint
Proportional
range
Time
Maximum pulse frequency
50 % pulse frequency
No pulses
% controller output
Hard Fail Only
Hard + Soft Fail