Manual

116
DXi User Manual
Appendix C: Current Alarms Within a Conventionlly Wired DXi System
Example Scenarios:
Scenario 1 - DXi submaster 001-00 begins automatic irrigation operation of program
1, by activating MV1, Pump1 then station 1. After station 1 is activated the measured
current exceeds the maximum allowed current.
FLOW
MAX
Group
Satellite
Type
Master
Valves
"ON"
Pumps
"ON"
Station
"ON"
Min
Current
Nominal
Current
Max
Current
Total
Min.
Current
Total
Measured
Current
Total
Max.
Current
Sub
001-00
DXi M1 P1 1 M1 = 0.20
P1 = 0.25
S1 = 0.15
M1 = 0.25
P1 = 0.30
S1 = 0.20
M1 = 0.29
P1 = 0.34
S1 = 0.24
0.60 0.90 0.87
Sat 001-
01
DXi
Sat 001-
02
DX2
Sat 001-
03
DX2
Result 1 - DXi submaster 001-00 suspends irrigation (valves are deactivated, and
program runtimes continue to decrement) and starts diagnostic process.
DXi submaster 001-00 activates M1, verifies current is in range, and deactivates M1.
DXi submaster 001-00 activates P1, verifies current is in range, and deactivates P1.
DXi submaster 001-00 activates S1, verifies current is above maximum allowed, and
deactivates S1. DXi submaster 001-00 raises alarm 1120 "Station Maximum Current"
and condemns S1.
DXi submaster 001-00 resumes automatic irrigation operation of program 1, for none
condemned stations. Manual or automatic operations will not activate S1 until alarm is
cleared.
Scenario 2 - DXi submaster 001-00 begins automatic irrigation operation of program
1, by activating MV1, Pump1 then station 1. After station 1 is activated the measured
current exceeds the maximum allowed current.
FLOW
MAX
Group
Satellite
Type
Master
Valves
"ON"
Pumps
"ON"
Station
"ON"
Min
Current
Nominal
Current
Max
Current
Total
Min.
Current
Total
Measured
Current
Total
Max.
Current
Sub
001-00
DXi M1 P1 1 M1 = 0.20
P1 = 0.25
S1 = 0.15
M1 = 0.25
P1 = 0.30
S1 = 0.20
M1 = 0.29
P1 = 0.34
S1 = 0.24
0.60 0.90 0.87
Sat 001-
01
DXi
Sat 001-
02
DX2
Sat 001-
03
DX2
Result 2 - DXi submaster 001-00 suspends irrigation (valves are deactivated, and
program runtimes continue to decrement) and starts diagnostic process.
DXi submaster 001-00 activates M1, verifies current is in range, and deactivates M1.
DXi submaster 001-00 activates P1, verifies current is in range, and deactivates P1.
DXi submaster 001-00 activates S1, verifies current is in range, and deactivates S1.
DXi submaster 001-00 resumes automatic irrigation operation of program 1. Since no
violation could be confirmed, no alerts are raised and no stations are condemned.