Santerno Sinus Penta - Table 61: Virtual Digital Output Modes

PROGRAMMING GUIDE
SINUS PENTA
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Table 61: Virtual Digital Output Modes
DISABLING
The selected digital output is disabled.
DIGITAL
The digital output depends on a selected digital signal and on the logic output function
(True/False).
DOUBLE DIGITAL
The digital output depends on 2 selected digital signals, on the logic function calculating the
output value and on the logic output function (True/False).
ANALOG
The digital output depends on a selected analog variable, which is tested through Test A
obtaining one digital signal; starting from its value, the selected logic function calculates the
True/False end value.
DOUBLE ANALOG
The digital outputs depends on 2 selected analog variables: Test A is performed for variable A,
whilst Test B is performed for variable B, thus obtaining 2 digital signals; starting from their
value, the selected logic function calculates the output value, whereas the logic output function
True/False calculates the end value.
DOUBLE FULL
As DOUBLE ANALOG or DOUBLE DIGITAL mode, but both digital signals and analog
variables can be selected.
If you select a digital signal, its value (TRUE or FALSE) is used to calculate the selected logic
function.
If you select an analo
g variable, the test selected for this variable is performed, and its result
(TRUE or FALSE) is used to calculate the selected logic function.
BRAKE (*)
As ABS BRAKE below, although the selected variables are not expressed as absolute values,
but depend on the selected tests.
ABS BRAKE (*)
The ABS BRAKE mode allows controlling the electromechanical brake of a motor used for
lifting applications. The ABS BRAKE mode is applied by selecting the measured (or estimated)
speed value [A71] as the first variable and the output torque [A80] as the second variable.
Variables are considered as absolute values.
ABS LIFT (*)
As ABS BRAKE, but the brake unlocks (digital output open) when a given torque value is
attained, which is automatically determined based on the l
ast torque value required in the
previous stroke.
(*) The activation and deactivation of the outputs programmed as BRAKE, ABS BRAKE and ABS LIFT is affected also
by other conditions depending on the drive status. Namely:
Activation
Conditions to be considered in logic AND with the following programmed functions:
• Drive accelerating or in pre-tensioning mode (see BRIDGE CRANE MENU).
• Drive running, no alarm triggered
Deactivation
Conditions to be considered in logic OR with the following programmed functions:
• Drive not running or locked due to an alarm condition
• Drive in tracking error mode (see ENCODER/FREQUENCY INPUTS MENU
), unless parameter
C303 is set to NO (see BRIDGE CRANE MENU).
CAUTION
The digital outputs programmed as BRAKE, ABS BRAKE or ABS LIFT are inactive in
a drive configured in slave mode (torque control).
In a master/slave system, both electromechanical brakes mu
st be controlled by the
master.
Variable A Selected for MPL1 (2, 3, 4): P351, (P360, P369, P378)
Selects the digital signal or the analog variable used for Test A (set with P353 / P362 / P371 / P380).
The whole list of the selectable items and their description are stated in Table 48.
If a digital signal is selected, Test A is not performed: therefore, the comparison value for Test A (set with P355 / P364 /
P373 / P382) has no meaning.
NOTE
This parameter can
be accessed only if the operating mode of the digital output
concerned is other than zero. Example: MPL1 P350≠0.