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8
PROGRAMMING EXAMPLES
This chapter provides programming examples which control the inverter with sequence programs.
Item
Reading the inverter status
Setting the operation mode
Setting the operation commands Commanding the forward rotation and middle speed signals
Setting the monitoring function
Reading a parameter value
Writing a parameter value
Setting the running frequency
(running speed)
Reading the alarm definitions
Inverter reset
(1) System configuration for programming example
PLC
CPU
Power supply
Q02CPU
Q61P-A1
Terminating
resistor
78
Reading the inverter status from the buffer memory of the master station
Selecting the network operation mode
Monitoring the output frequency
Reading the value of Pr. 7 Acceleration time
Setting "3.0 s" in Pr. 7 Acceleration time
Setting to 50.00Hz
Reading the inverter alarms
Perform inverter reset at an inverter alarm occurrence.
Master station
Input unit
QJ61BT11N
QX40
(X/Y00 to 1F)
(X20 to X2F)
X20
Station 1
Station 2
Inverter
FR-A7NC
Pr.542 = 1
Pr.544 = 0
Program Example
Output unit
QY40P
(Y30 to Y3F)
Y30
Inverter
FR-A7NC
Terminating resistor
selection switch is on
Pr.542 = 2
Pr.544 = 0
Refer
to Page
81
82
83
84
85
86
87
89
90
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