Pepperl+Fuchs HD2-DM-A Manual page 144

Advanced Diagnostics
Cabinet I/O
2.
Select an unused on/off controller and configure it as follows:
Options: Invert
On level: Temperature level at which the output is supposed to be switched OFF (Note: Inverted
output!)
Off level: Temperature level at which the output is supposed to be switched ON (Note: Inverted
output!)
Input selection: Select the temperature input to be used as reference temperature.
3.
Configure the output source of the selected relay contact output to the selected on/off
controller.
4.
Configure measurement unit of selected temperature input.
Using Frequency Diagnostics (Ventilator Speed Control)
1.
Select an unused frequency input and configure it as follows:
Frequency input: Enable, i.e., set input to frequency mode.
Option: Enable or disable NAMUR lead breakage and short circuit detection as required.
2.
Configure the High-/Low- Out-of-Specification and Maintenance-Required limits.
3.
Configure the field diagnostics alarms in the resource block.
Monitoring Ambient Conditions (Humidity/Temperature)
In order to enable the field diagnostics alarms for ambient conditions, configure the required
High-/Low- Out-of-Specification and Maintenance-Required limits of the board sensors.
Using Binary Input Diagnostics (Cabinet Door Monitoring, Bulk Power
Supply Failure Monitoring)
1.
Select an unused binary input and configure it as follows:
Options: Enable or disable NAMUR lead breakage and short circuit detection as required.
Binary options: Enable Invert if required.
2.
Check the corresponding flag in "FD Binary OOS Map" or "FD Binary MR Map". When the
input is "1", the selected field diagnostics condition is triggered.
3.
Configure the field diagnostics alarms in the resource block.
Mapping of Field Diagnostics to Common Alarm Output (Volt-Free
Contact)
Select the required field diagnostics condition as an output source for the common alarm out-
put.
Two mapping examples help to illustrate how it works:
• FD Out of Specification: If field diagnostics reports an Out-of-Specification alarm or worse
(Failure alarm), the output is OPEN.
• FD Check: If field diagnostics reports a check-function alarm or worse (Failure, Out-of-
Specification, Maintenance-Required alarms), the output is OPEN.
Note
The common alarm output is a volt-free contact that is designed to be used as
an alarm contact. The normal state ("OFF") is CLOSED.
Note that the ALM LED of the device is connected to the common alarm
output. When the output is closed, the LED flashes.
143