Fuji Electric FRENIC-Ace series - Page 441

5.3 Description of Function Codes
5-271
FUNCTION CODES
Chap 5
■ Operating precautions
The customizable logics are executed within 2 ms to 20 ms (according to U100) and processed in the following
procedure:
(1) First, latch the external input signals for all the customizable logics from step 1 to 200 to maintain
synchronism.
(2) Perform logical operations sequentially from step 1 to 200.
(3) If an output of a step is an input to the next step, outputs of step with high priority can be used in the same
process.
(4) The customizable logic simultaneously updates 10 output signals.
Note that if you do not consider the process order of customizable logic when configuring a function block, the
expected output may not be obtained, the operation can be slower or a hazard signal can occur, because the
output signal of a step is not available until the next cycle.
Changing a functional code related to the customizable logic (U code etc.) or turning ON the customizable logic
cancel signal “CLC” causes change in operation sequence depending on the setting, which may suddenly start
an operation or start an unexpected action. Fully ensure it is safe before performing the operation.
An accident or physical injury may occur.
■ Customizable logic timer monitor (Step selection) (U91, X89 to X93)
The monitor function codes can be used to monitor the I/O status or timer’s operation state in the customized
logics.
Table 5.3-34 Selection of monitor timer
Function code Function Remarks
U91 0: Monitor not active (the monitor data is 0)
1 to 200: set the step No. to monitor
The setting value is cleared to 0 when
powered off.
Table 5.3-35 Monitor method
Monitor method Function code Data
Communication X89 customizable logic
(digital I/O)
Digital I/O data for the step defined in U91
(only for monitoring)
X90 customizable logic
(timer monitor)
Data of the timer/counter value for the step defined in U91
(only for monitoring)
X91 customizable logic
(analog input 1)
Analog input 1 data for the step defined in U91
(only for monitoring)
X92 customizable logic
(analog input 2)
Analog input 2 data for the step defined in U91
(only for monitoring)
X93 customizable logic
(analog output)
Analog output data for the step defined in U91
(only for monitoring)
2 to 20 ms cycle
Input signal
latch
Logical operation
Step
1 → 2 → 3 · · · 200
Simultaneous
update of
output signals
Input signal
latch