Samson 4785, Mounting And Operating Instructions

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Fail-safe position
ACTUATOR_ACTION
States:
Fail-safe position of the actuator in the event of air/power failure or start-up.
Read-only value, automatically determined during initialization.
0 = Not initialized
1 = Opening towards the 100 % position
2 = Closing towards the 0 % position
3 = None/saving (position is retained)
Fail-safe time
FSAFE_TIME
Range:
Default:
If the DP watchdog detects a communication failure, the fail-safe action is triggered
after the fail-safe time has elapsed.
0 to 3600 sec
10 sec
Fail-safe value reference variable
FSAFE_VALUE
Default:
Substitute value for set point (reference variable w or w_rcas) when communication
failure is recognized.
0
Final position when
reference variable is above
the limit value
SETP_CUTOFF_INC
Default:
If the reference variable exceeds the entered limit, the valve moves towards the end
position corresponding to 100 % of the reference variable. Hysteresis 1%.
When the value is 125 %, the function is deactivated.
99 %
Caution! Since the actuator will automatically be filled with air or vented when this
function is executed, the control valve moves to its absolute final positions.
Restrictions specified in the functions "travel range" or "travel limit" do not apply here.
This function must be deactivated if unacceptably high positioning forces result from
the complete filling/venting action.
Final position when
reference variable is
below the limit value
SETP_CUTOFF_DEC
Default:
If the reference variable falls below the entered limit, the valve moves towards the end
position corresponding to 0 % of the reference variable. Hysteresis 1%.
When the value is
−
2.5 %, the function is deactivated.
1 %
Caution! Since the actuator will automatically be filled with air or vented when this
function is executed, the control valve moves to its absolute final positions.
Restrictions specified in the functions "travel range" or "travel limit" do not apply here.
This function must be deactivated if unacceptably high positioning forces result from
the complete filling/venting action.
Firmware version
SW_REVISION
Firmware version communication/control
Hardware version
HW_REVISION
Hardware version electronics/mechanics
Identification forced venting
IDENT_FORCED_VENTING (M)
States:
Indicates whether the optional forced venting function has been installed.
Read-only parameter (automatically set by the device)
0 = Not installed
1 = Installed
58
EB 8382-2 EN
List of parameters