Chapter 4 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 35
Set Alarm Limits for Analog Outputs /
LED Indication
Use the
ALARM
command to set the analog output alarm limits and
quantities. For an explanation of the alarm limits, see section Limit
Alarm on page 22.
ALARM
<cr>
Before setting the alarm limits, verify the currently set analog output
modes using the
AMODE
command.
The following example shows that a high limit alarm has been enabled
for channel 2. If the measured value rises above the limit ( 0.90 a
w
), an
error is reported. If you are using a LED cable, the LED lights up to
indicate an error state.
Example:
alarm ?
Channel 1:
Low Limit : OFF
High Limit : OFF
Aerr : ON
Quantity : T
Limit Lo : 15.00
Limit Hi : 30.00
Hysteresis : 0.50
Level Lo : 0.20
Level Hi : 0.80
Channel 2:
Low Limit : OFF
High Limit : ON
Aerr : OFF
Quantity : aw
Limit Lo : 0.10
Limit Hi : 0.90
Hysteresis : 0.01
Level Lo : 0.20
Level Hi : 0.80
Set Voltage for LED Alarm
With the
LED
command, you can set a different voltage level for each
channel.
Example:
led ?
Ch 1 Led Voltage : 2.80 V
Ch 2 Led Voltage : 2.80 V
