Super Systems 3 Series - Manual (Page 34)

Operations Manual Series 3
34
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
between +100% 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
between +100% ‘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When the sensor break condition is no longer
applicable the alarm indication and output cancel.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
between +100% ‘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When the sensor break condition is no longer
applicable it is necessary to press ACK to cancel the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.