Mitsubishi Electric MELSEC FX3U Programming Manual page 412

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
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
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
X030
M 0
X035
M 1
X033
M 2
X040
M 3
X032
M 4
X034
M 5
X026
M 6
X041
M 7
In this example, M0 is used as the head input for mode specification.
M8000
RUN
monitor
410
operation mode and zero return
Example:
X030:Zero return operation mode
X031:Continuous operation mode
X032:Automatic mode start zero
X033:Stop
M8000
Individual
operation mode
RUN monitor
X030
Zero return
operation mode
M8000
Stepping
operation mode
Cycle operation
mode
X031
Continuous
operation
X032
Zero return
start
Automatic
mode start
X033
Stop
FNC 60
M 0 S 20
IST
When only the continuous
operation mode are used
return start
Does not
M 0
operate
Zero return
M 1
operation mode
Does not
M 2
operate
Does not
M 3
operate
Continuous
M 4
operation
Zero return
M 5
start
Automatic
M 6
mode start
M 7
Stop
S 29
14 Handy Instruction – FNC 60 to FNC 69
14.1 FNC 60 – IST / Initial State
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
X030
Individual
M 0
operation mode
M8000
M 1
M 2
M 3
X031
Continuous
M 4
operation
M8000
M 5
X032
Automatic
M 6
mode start
X033
M 7
Stop