Endress+Hauser Fieldgate FXA42, Руководство по эксплуатации

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Operation Fieldgate FXA42
52 Hauser
Unit Description
State
Active
Sel
Next0
Cond0
State Machine 0
A0034300-EN
This unit represents the state of a state machine. There are eight different state machine units ( state
machine 0 to state machine 7 ), allowing you to implement eight independent state machines.
A state machine is implemented by placing various state machine units with the same state machine
index (e.g. state machine 0). The value of the input port
Sel (32-bit signed integer) of the relevant unit
determines which state is handled by it. A state machine unit checks its Boolean input ports Cond<X>
when it becomes active (state = Sel ). If one of the Boolean input ports is set to 1 , the state machine
changes its state – which is determined by the corresponding input port Next<X> (32-bit signed
integer) – after the current IPO cycle.
The output port
State (32-bit signed integer) displays the current state of the state machine. The
Boolean output port Active indicates that the corresponding unit is currently active (state of the state
machine = Sel ).
The initial state is 0 .
Sub
A0034306
This unit performs a subtraction. It subtracts the values of its second input port and the subsequent
input ports from its first input port and writes the difference to its output port.
The subtraction is performed in the largest numeric data type of all the output ports that are
connected to the input ports of the unit. All the ports of the unit adopt this data type.
T
Clk
T-FF Q
A0034307
This unit represents an T-Flipflop. The Boolean output port has the value 0 . If the Boolean input port
T is set to 1 , the Boolean output port changes its state with each rising edge on the Boolean input port
Clk . If the input port T is set to 0 , the output port retains its previous value.
Int
En
Timer Clk
A0034308
This unit represents a timer. It outputs a periodic clock signal on the Boolean output port Clk . The
duration of the signal is specified by the value of the input port Int (interval, 32-bit unsigned integer)
and must be a multiple (at least twice) of the cycle time of the PLC. If the value of the input port Int is
less than the cycle time or not divisible by the cycle time, the value is rounded up internally to the
nearest multiple of the cycle time. The clock signal is only generated as long as the Boolean input port
En is set to 1 .
IN
PT
TOF
Q
ET
A0034309
This unit represents a timer off-delay.
When the Boolean input port
IN switches to 1 , the Boolean output port Q is set to 1 . The timer is
started when the Boolean input port IN switches to 0 . The output port ET (elapsed time, 32-bit
unsigned integer) indicates how much time, in milliseconds, has elapsed since the timer was started.
When the value of the output port
ET reaches the value of the input port PT (preset time, 32-bit
unsigned integer) the timer is stopped and the output port Q is reset.
IN
ET
Q
← →
PT
← →
PT
A0034332

If the value of the input port Int is less than the cycle time or not divisible by the cycle time, the
value is rounded up internally to the nearest multiple of the cycle time.