Sensaphone SCADA 3000 Users manual - Manual (Page 159)

15-3
Chapter 15: Ladder Logic Programming
XIC Instruction (examine if Closed)
This instruction is used to determine if a contact has closed or to check if a bit is ON. When
the address represents a discrete input, the program checks the open/closed status of the con-
tact connected to the input. If the contact is closed, then the instruction is evaluated as true.
When the address represents a bit value of an instruction, the program checks to see if the bit
is ON. If the bit is on, then the instruction is evaluated as true.
The instruction executes in 2.8µs and requires 24 bytes.
Following is a list of the data points that may be used with XIC instructions:
Inputs, when configured as a contact closure
Relay outputs
Timer Status bits (Done, Running, Enable)
Counter Status bits (Done, Count-up enable, Count-down enable, Overflow, Underflow)
Ladder bits
C variables, when used as bit values (0 or 1)
XIO Instruction (examine if Open)
This instruction is used to determine if a contact has opened or to check if a bit is OFF. When
the address represents a discrete input, the program checks the open/closed status of the con-
tact connected to the input. If the contact is open, then the instruction is evaluated as true.
When the address represents a bit value of an instruction, the program checks to see if the bit
is OFF. If the bit is OFF, then the instruction is evaluated as true.
The instruction executes in 2.8µs and requires 24 bytes.
Following is a list of the data points that may be used with XIO instructions:
Inputs, when configured as a contact closure
Relay outputs
Timer Status bits (Done, Running, Enable)
Counter Status bits (Done, Count-up enable, Count-down enable, Overflow, Underflow)
Ladder bits
C variables, when used as bit values (0 or 1)