Yokogawa Electric Corporation - TC10 - ENGINEERING MANUAL - PAG. 12
[24] o3Ac - Out 3 action
Available:
when [21] o3F is different from “nonE”.
Range:
dir =
Direct action;
rEU = Reverse action;
dir.r =
Direct action with revers LED indication;
rEU.r = Reverse action with reverse LED indication.
For more details see [18] o1.Ac parameter.
[25] o4F - Out 4 function
Available:
When the [9] io4.F = Out4.
Range:
nonE = Output not used. With this setting the status
of the this output can be driven directly
from serial link.
H.rEG = Heating output;
c.rEG = Cooling output;
AL =
Alarm output;
t.out = Reserved;
t.HoF = Reserved;
P.End = Reserved;
P.HLd = Reserved;
P. uit = Reserved;
P.run = Reserved;
P.Et1 = Reserved;
P.Et2 = Reserved;
or.bo = Out-of-range or burn out indicator;
P.FAL = Power failure indicator;
bo.PF = Out-of-range, burn out and Power failure
indicator;
St.By = Stand By status indicator.
For other details see [14] O1F parameter.
[26] o4.AL - Alarms linked up with Out 4
Available:
When [25] o4F = AL.
Range:
0 to 63 with the following rule.
+1 =
Alarm 1;
+2 =
Alarm 2;
+4 =
Alarm 3;
+8 =
loop break alarm;
+16 = Sensor break (burn out);
+32 = overload on Out 4 (short circuit on OP4).
For more details see [17] o1.AL parameter.
[27] o4Ac - Out 4 action
Available:
When [25] o4F is different from “nonE”.
Range:
dir =
Direct action;
rEU = Reverse action;
dir.r =
Direct action with revers LED indication;
rEU.r = Reverse action with reverse LED indication.
For more details see [18] o1.Ac parameter.
]
AL1 Group - Alarm 1 parameters
[28] AL1t - Alarm 1 type
Available:
Always.
Range: •
When one or more outputs are programmed as
control output:
nonE = Alarm not used;
LoAb = Absolute low alarm;
HiAb = Absolute high alarm;
LHAo = Absolute band alarm with alarm indication
out of the band;
LHAi = Absolute band alarm with alarm indication
inside the band;
SE.br = Sensor break;
LodE = Deviation low alarm (relative);
HidE = Deviation high alarm (relative);
LHdo = Relative band alarm with alarm indication
out of the band;
LHdi = Relative band alarm with alarm indication
inside the band.
•
When no output is programmed as control output:
nonE = Alarm not used;
LoAb = Absolute low alarm;
HiAb = Absolute high alarm;
LHAo = Absolute band alarm with alarm indication
out of the band;
LHAi = Absolute band alarm with alarm indication
inside the band;
SE.br = Sensor break.
Notes: 1.
The relative and deviation alarms are “relative” to
the operative set point value.
LoAb
OUT
AL1
AL1
PV
HAL1
time
HiAb
off
off
off
OUT
AL1
AL1
PV
HAL1
time
off
off
off
ON
ON
ON
ON
LHAo
PV
AL1H
HAL1
time
off
off
off
LHdo
OUT
AL1
AL1L
HAL1
PV
AL1H
SP
HAL1
time
OUT
AL1
-AL1L
HAL1
off
off
off
ON
ON
ON
ON
2.
The (SE.br) sensor break alarm will be ON when
the display shows
----
indication.
[29] Ab1 - Alarm 1 function
Available:
When [28] AL1t is different from “nonE”.
Range:
0 to 15 with the following rule:
+1 = Not active at power up;
+2 = Latched alarm (manual reset);
+4 = Acknowledgeable alarm;
+8 =
Relative alarm not active at set point change.
Example:
Setting Ab1 equal to 5 (1+4) the alarm 1 will be
“not active at power up” and “Acknowledgeable”.
Notes: 1.
The “not active at power up” selection allows to
inhibit the alarm function at instrument power up
or when the instrument detects a transfer from:
•
Manual mode (oplo) to auto mode;
•
Stand-by mode to auto mode.
The alarm will be automatically enabled when
the measured value reaches, for the first time,
the alarm threshold ±hysteresis (in other words,
when the initial alarm condition disappears).
PWR ON
AL1
PV
time
off
off
Ab1 = +1
Ab1 = +0
off
off
ON
ON
ON
2.
A “Latched alarm” (manual reset) is an alarm
that will remain active even if the conditions that
generated the alarm no longer persist. Alarm
