SSP North AB
30/08/2018
Manual V2f
93
requirement for two-hand devices. The Simultaneity between two or more sensors is also often used
for bypassing of light grids when material shall pass into a safeguarded cell.
For other devices the simultaneity can be useful to detect malfunctions. In an E-stop if one out of two
contacts would have a delayed action, this could be detected before it fails completely.
13.11.3.7 Enable Zero Time
This property enables the Zero Time property, which, when enabled, requires the input to be in OFF
state for a certain amount of time before it can go to ON state (see chapter 13.11.3.8).
13.11.3.8 Zero Time (ms)
The Zero Time property tells the function that the terminals must be in OFF state for longer than this
time, before the function can go to ON state again. This is required whenever the function leaves ON
state, or when the function is in ERROR state. This property can be used for example with a Two-
Hand Device input, where the Two-Hand device must be released for at least this time before it can be
used again.
13.11.3.9 Comment
The Comment property can be changed to add text above the block in the logic graph. This is for
giving names or descriptions to blocks and does not affect the compiled program in any way.
13.11.3.10 Terminal Count
This property sets how many channels this input should have. For most applications, the Terminal
Count is set to Single (for inputs like Push Buttons), Double (for safety sensors like Gate Sensors or
Light Barriers, or for E Stops), or in some cases Quadruple (for example for Two-Hand devices).
For the Advanced Input function, this can be set to a maximum of Octuple (8 channels).
13.11.3.11 Pin Properties
Each pin has 5 properties; Pin, Signal Type ON, Signal Type OFF, Special Voltage, High Voltage, and
Low Voltage. The Pin property decides which terminal number that should be used. The Signal Type
ON and Signal Type OFF determines what the ON state and OFF state signals should be for this
terminal. Enabling special voltage enables the High Voltage and Low Voltage properties. These
determine which voltage levels should be used as a logical high and low signal for this pin. The
voltages are independent of the supply voltage.
Содержание Safety Simplifier
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