Application note
Level alarms on analogue channels
Alarms on analogue channels can be selected as
– AnalogIn higher than Level1
– AnalogIn higher than Level2
– AnalogIn lower than Level1
– AnalogIn lower than Level2.
– No load / Wire broken.
Limit alarm can be enabled to create an alarm signal, when the AnalogIn values are higher and/or lower than the limits specified. Level1 and Level2 alarm conditions can be combined freely, which makes the system very flexible.
No load / Wire broken. When using the analogue channels in 4–20 mA mode, a current monitor can be enabled to produce an alarm if the current drops below 3 mA.
(See also: ChConfig.EnableFunctions)
Example 1:
Alarm used for monitoring “Signal too high” or “Signal too low”:
Example 2:
Alarm used for monitoring “Signal high” or “Signal too high”
Related Topics
Notification
Signal out of range alarms
Application note for PD 640 (mA)
Application note for PD 641 / 643 (Pt100 / Pt 1000)
Application note for PD 642 / 643 (mV / thermocouple)
Analogue modules
