Fan alarms
This module provides a status alarm output.
If parameter ALM-05 > 0 the macro generates FailCmdAlarms, as shown in the following tables. If the alarm conditions are true, the alarms will occur after a delay defined by the value of the parameter ALM-05
If the parameter ALM-03 = 1, and an alarm is generated, the output "Stage1Cmd" and Stage2Cmd" will stay in the output position which has caused the alarm.
Separate status connections
Output |
Status |
Alarm (ALM-05>0) |
Stage1Cmd on |
Status1 off |
FailCmdAlarm |
Stage2Cmd on |
Status2 off |
FailCmdAlarm |
Stage1Cmd off |
Status1 on |
FailCmdAlarm |
Stage2Cmd off |
Status2 on |
FailCmdAlarm |
Combined status connection
Output |
Status |
Alarm (ALM-06>0) |
Stage1Cmd on Stage2Cmd off |
Status1/2 off |
FailCmdAlarm |
Stage1Cmd off Stage2Cmd on |
Status1/2 off |
FailCmdAlarm |
Stage1Cmd off Stage2Cmd off |
Status1/2 on |
FailCmdAlarm |
Stage1Cmd on Stage2Cmd on |
Status1/2 off |
FailCmdAlarm |
Fan belt alarm
The macro generates fan belt alarms with a time delay defined by ALM-06, if the fan belt input does not detect airflow after the fan has switched on.
The fan belt alarm reset is manual by default and can be changed with parameter ALM-04.
Output |
Status |
Fan belt alarm |
Stage1Cmd on |
FanBeltIn off |
FanBeltAlarm |
Stage2Cmd on |
FanBeltIn off |
FanBeltAlarm |
Alarm inputs
The alarm points "Alarm1" and "Alarm2" will generate only point alarms. The outputs "Stage1Cmd" or "Stage2Cmd" will stay on.
Maintenance switch alarm
The maintenance switch has the highest priority and switch of the stages "Stage1Cmd" and "Stage2Cmd".
With the parameter ALM-01 can be differentiated whether the repair switch NO or NC.
MaintSw |
Alarm |
MaintSw off |
CommAlarm |
Common alarm output
The output CommAlarm will be in alarm whenever one of the fail to command alarms, fan belt alarms, alarm inputs, or "MainSw" is active.
Manual- or automatic reset of fan alarms
The user can select manual or automatic reset of alarms, setting the parameter ALM-02/ ALM-03.
In case of manual reset, the user has to connect the "Reset" input of the macro to the reset button.
Description |
Default value |
SYS-01: serial/ parallel contacts ST1/ST2 0 = serial 1 = parallel |
0 |
STx-01: delay from off to low speed |
5 sec |
STx-02: delay from low to high speed |
|
STx-03: delay from high to low speed |
30 sec |
NFE-01: delay next fan enable |
60 sec |
ALM-01: maint switch NO/ NC; 1 = NC |
1 |
ALM-02: maint switch reset type 0 = manual reset 1 = auto reset |
1 |
ALM-03: fan alarm reset type 0 = manual reset 1 = auto reset |
1 |
ALM-04: fan belt alarm reset type 0 = manual reset 1 = auto reset |
0 |
ALM-05: delay status alarm; 0 = disable |
60 sec |
ALM-06: delay fan belt alarm; 0 = disable |
120 sec |
DISP-01: fan belt alarm; 1 = alarm |
- |
DISP-02: fan fail cmd alarm; 1 = alarm |
- |