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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
14 Handy Instruction – FNC 60 to FNC 69
14.1 FNC 60 – IST / Initial State
3. Assignment of mode selection inputs
For using IST instruction, it is necessary to assign inputs having consecutive device numbers as shown below for
mode inputs.
When using non-consecutive inputs or omitting some modes, change the layout by using an auxiliary relay as the
head input for mode specification as shown in the figure below.
- X020: Individual operation mode
- X021: Zero return operation mode
- X022: Stepping operation mode
- X023: Cycle operation mode
- X024: Continuous operation
- X025: Zero return start
- X026: Automatic mode start
- X027: Stop
In this example, M0 is used as the head input for mode specification.
X030
M 0
Individual
operation mode
X035
M 1
Zero return
operation mode
X033
M 2
Stepping
operation mode
X040
M 3
Cycle operation
mode
X032
M 4
Continuous
operation
X034
M 5
Zero return
start
X026
M 6
Automatic
mode start
X041
M 7
Stop
M 0
Does not
operate
X030
M 1
Zero return
operation mode
M 2
Does not
operate
M 3
X031
M 4
Continuous
operation
X032
M 5
Zero return
start
M 6
Automatic
mode start
X033
M 7
Stop
M8000
RUN monitor
M8000
M 0
X030
M 1
M 2
M 3
X031
M 4
Continuous
operation
X032
M 5
M 6
Automatic
mode start
X033
M 7
Stop
M8000
M8000
Individual
operation mode
When inputs do not have
consecutive device numbers
Example:
X030:Individual operation mode
X035:Zero return operation mode
X033:Stepping operation mode
X040:Cycle operation mode
X032:Continuous operation mode
X034:Zero return start
X026:Automatic mode start
X041:Stop
When only the continuous
operation mode and zero return
operation mode are used
Example:
X030:Zero return operation mode
X031:Continuous operation mode
X032:Automatic mode start zero
return start
X033:Stop
When only the continuous
operation mode and individual
operation mode are used
Example:
X030:Individual operation mode
X031:Continuous operation mode
X032:Automatic mode start
X033:Stop
Does not
operate
M8000
RUN
monitor
FNC 60
IST
M 0 S 20 S 29