Differential Alarm Setpoints (P043 - P044) - Siemens SITRANS WM300 MFA Operating Instructions Manual

6.7.3

Differential alarm setpoints (P043 - P044)

Differential alarm setpoint displays (Inputs I3 and
I5)
Differential alarm setpoint displays (Inputs I4 and
I6)
Note
Each channel is programmed independently due to variation in frequency based on a target
RPM or the number of targets on two different rotating shafts.
SITRANS WM300 MFA
Operating Instructions, 08/2018, A5E45090709-AA
DSD alarm setpoint A and C (P043)
For relay output Q3.
Enter the percentage difference between frequency of probe A and
probe C for relay output. When enabled, output Q3 will alarm on set-
point differential programmed. When inputting the setpoint value in
percentage, the operator observes the frequency of both setpoints for
comparison using this parameter.
Alarm = 1 to 10%
•
When function is enabled, output Q3 is used to alarm the pro-
•
grammed differential percentage setpoint.
When inputting the setpoint value percentage, the operator can
•
observe the current frequency of both setpoints for comparison in
this display.
DSD alarm setpoint B and D (P044)
For relay output Q4.
Enter the percentage difference between frequency of probe B and
probe D for relay output. When enabled, output Q4 will alarm on set-
point differential programmed. When inputting the setpoint value in
percentage, the operator observes the frequency of both setpoints for
comparison using this parameter.
Alarm = 1 to 10%
•
When function is enabled, output Q4 is used to alarm the pro-
•
grammed differential percentage setpoint.
When inputting the setpoint value percentage, the operator can
•
observe the current frequency of both setpoints for comparison in
this display.
Parameter assignment
6.7 Differential speed detection
49