5-146
Chap. 5 FUNCTION CODES
F codes
E codes
C codes
P codes
H codes
A codes
b codes
r codes
J codes
d codes
U codes
y codes
Notes for using a customizable logic
A customizable logic performs processing every 2 ms in the following sequence.
(1) At the start of processing, the customizable logic latches all of the external input signals entered to steps 1 to 10 to
ensure simultaneity.
(2) Logical operations are performed in the order of steps 1 to 10.
(3) If an output of a particular step applies to an input at the next step, the output of the step having processing priority
can be used in the same processing.
(4) The customizable logic updates all of the five output signals at the same time.
When configuring a logic circuit, take into account the processing order of the customizable logic. Otherwise, a delay in
processing of logical operation leads to a signal delay problem, resulting in no expected output, slow processing, or a
hazard signal issued.
Ensure safety before modifying customizable logic related function code settings (U codes and related function
codes) or turning ON the "Cancel customizable logic" terminal command CLC. Depending upon the settings, such
modification or cancellation of the customizable logic may change the operation sequence to cause a sudden motor
start or an unexpected motor operation.
An accident or injuries could occur.
Customizable logic timer monitor (Step selection) (U91)
The contents of the timer in a customizable logic can be monitored using the monitor-related function code or the
keypad.
Selecting a timer to be monitored
Function code Function Remarks
U91
1 to 10: Specifies the step number whose timer or counter is to be
monitored
Monitoring
Monitored by: Related function code and LED monitor display Monitored item
Communications link
X90 Customizable logic (Timer monitor)
Keypad
I/O checking:
4_24？
Timer or counter value specified by
U91 (dedicated to monitoring)
Cancel customizable logic CLC (E01 to E07, data = 80)
This terminal command can disable the customizable logic temporarily. This terminal command is used to run the
inverter without using the customizable logic circuit or timers for maintenance or other purposes.
CLC Function
OFF
Enable customizable logic (Depends on the U00 setting)
ON
Disable customizable logic
Before changing the setting of CLC, ensure safety. Turning CLC ON disables the sequence of the
customizable logic, causing a sudden motor start depending upon the settings.
Clear all customizable logic timers CLTC (E01 to E07, data = 81)
Assigning CLTC to any of the general-purpose digital input terminals and turning it ON resets all of the
general-purpose timers and counters in the customizable logic. This terminal command is used when the timings
between the external sequence and the internal customizable logic do not match due to a momentary power failure or
other reasons so that resetting and restarting the system is required.
CLTC Function
OFF
Ordinary operation
ON
Reset all of the general-purpose timers and counters in the customizable logic.
(To operate the timers and counters again, revert
CLTC to OFF.)
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