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3200 Series
User Manual
Part No HA028651 Issue 11.0 July-12 41
8.1.2
Operation of Sensor Break
Sensor break type (SB.TYP) can be set to operate in three different modes:-
1.
Off
2.
On
3.
Latching
SB.TYP = Off
Type of Output
Output in Sensor Break
Alarm State
For heat + cool, OP.HI and OP.LO can be set
b100%
OP.HI (100%)
Safe value has no effect
No alarm indication will be displayed
For heat only OP.HI and OP.LO can be set
between 0.0% and +100%
OP.HI (100%)
Safe value has no effect
For cool only OP.HI and OP.LO can be set
between -100.0% and 0%
OP.HI (0%)
Safe value has no effect
SB.TYP = on
Type of Output
Output in Sensor Break
Alarm State
For heat + cool, OP.HI and OP.LO can be set
b100%
‘SAFE’ value provided it is not set outside the
output limits, otherwise it will adopt OP.HI
ALM beacon flashes when an alarm occurs.
Output alarm relay activates. ACK has no
effect.
When the sensor break condition is no longer
applicable the alarm indication and output
cancel.
For heat only OP.HI and OP.LO can be set
between 0.0% and +100%
For cool only OP.HI and OP.LO can be set
between -100.0% and 0%
SB.TYP = Lat (Alarm latching)
Type of Output
Output in Sensor Break
Alarm State
For heat + cool, OP.HI and OP.LO can be set
b100%
‘SAFE’ value provided it is not set outside the
output limits.
i.e. the same as Sbrk = on
ALM beacon flashes when an alarm occurs.
Output alarm relay activates. ACK has no
effect.
When the sensor break condition is no longer
applicable it is necessary to press ACK to cancel
the alarm.
For heat only OP.HI and OP.LO can be set
between 0.0% and +100%
For cool only OP.HI and OP.LO can be set
between -100.0% and 0%
Note:- When the SAFE output value is outside the OP.LO and OP.HI limits it will be clipped into range and the controller
will use the value (i.e. adjusting OP.LO or OP.HI changes the SAFE value so that it is in range).
It could take either the lower or higher OP limit depending on its value and which limit has changed. Therefore, if SAFE =
0 and OP.LO is changed to 10, SAFE will also be set to 10. If SAFE = 50 and OP.HI is changed to 40, SAFE will change to
40.
Содержание XST-2-0-12-1V1-E28
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Страница 31: ...3216 3208 3204 User Manual 3200 Range Process Controller HA028651 11 Aug 2012 ...
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