The Solenoid Valves Are Disabled When; Spool Position Feedback (-Sp) - Danfoss PVE Series 4 Technical Information

Technical Information
Safety and monitoring
PVE fault monitoring overview
PVE type Fault monitoring Delay before error
PVEO No fault
PVEM monitoring
PVHC
PVEA Active
PVEH
PVEP
PVES
PVEU
Passive
PVE Active
Float
six pin
16
PVE, Series 4 for PVG 32/100/120 and PVHC
W
Warning
Error pins from more PVEs may not be interconnected. Not activated error pins are connected to ground
and will disable any active signal. Error pins are signal pins and can only supply very limited power
consumption.
To avoid the electronics in undefined state a general supervision of power supply (U
frequency is implemented. This function applies to PVEA, PVEH, PVEP, PVES and PVEU independently of
fault monitoring version and PVEM - and will not activate fault monitoring.

The solenoid valves are disabled when:

•
the supply voltage exceeds 36 V
•
the supply voltage falls below 8.5 V
•
the internal clock frequency fails
Error mode
out
- -
500 ms No fault
(PVEA: 750 ms)
Input signal faults
Transducer (LVDT)
Close loop fault
250 ms No fault
(PVEA: 750 ms)
Input signal faults
Transducer (LVDT)
Close loop fault
500 ms Float not active
750 ms Float still active
1)
Measured between fault output pin and ground.
W
Warning
It's up to the customer to decide on the required degree of safety for the system.
For PVE with direction indication:
•
both DI pins go low when error is active.
•
when U is disabled, U
DC1 S

Spool position feedback (-SP)

The –SP functionality is a 0,5 V to 4,5 V feedback, inverted in direction relative to U
value.
520L0553 • Rev GD • Jan 2014
Error output Fault output
status on PVE
- -
Low < 2 V
∼U
High
Low < 2 V
High ~U
High ~U
is not monitored and defined as 50%.
) and internal clock
DC
LED light
1)
-
Green
Flashing red
DC
Constant red
Green
Flashing red
DC
Constant red
Constant red
DC
with 2,5 V as neutral
S
Memory
(reset
needed)
-
-
Yes
-
No
Yes