Microtel MicroWin 2000 - Manual (Page 89)

MicroWIN 2000 Manual
Version 1.0
Dialer Controlled Channel Output Types
Digital Output – Local Alarm
While any unacknowledged dialer alarm is present on the dialer, this output will close. When all
alarms have been acknowledged or cleared, this output will reopen. This can be used as a Local
Alarm siren/light, trouble indicator, etc.
This channel’s output will close whenever the dialer’s Power/Fault Light is flashing 50/50.
Digital Output - Follow Channel
When a channel is set to follow another channel, its output state depends on the channel that it is
following. Since the Follow Channels are controlled by the dialer, remember that a user isn’t
able to control these channels’ output values. For example, for a user to have a manual override,
this will need to be added at the sight. Use two other digital output channels: one will be the
manual/automatic switch and the other will be to control the manual override state.
The following describes the five types of Follow Channels:
1) Follow Channel’s State
Whenever the followed channel’s state changes, opens or closes, this output will do the same,
open or close, respectively. If the followed channel is an analog channel, this output will be
closed only while the analog is in a fault condition (above high setpt or below low setpt).
2) Follow Channel’s Fault Condition
Whenever the followed channel’s state changes to its fault condition, this output will close.
When the followed channel’s fault condition clears, this output will reopen. If the followed
channel is an analog channel, this output will be closed only while the analog is in a fault
condition (above high setpt or below low setpt).
This is very close to the above setting of Following Channel’s State. The only difference
comes in when the channel it is following is a Normally Closed channel type: Digital Input
Normally Closed and Power Fail. There is a difference since the channel’s Fault State is
when the input is Open.
3) Follow Channel’s Alarm Condition
Whenever the followed channel goes into an alarm condition, this output will close. When
the followed channel’s alarm condition clears, this output will reopen.
The followed channel should not have its Alarm Configuration set to be a Status channel,
since an alarm condition will never occur. In this case, this output will always be Open.
4) Follow Channel’s Fill Algorithm
Following a Fill Algorithm, this output will Close when the followed analog state goes
below its low set point. The output will then Open when the followed analog state goes
above its high set point.
5) Follow Channel’s Empty Algorithm
Following an Empty Algorithm, this output will Close when the followed analog state goes
above its high set point. The output will then Open when the followed analog state goes
below its low set point.
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