Mitsubishi Electric MELSEC FX Series - Program Example

Inverter Drive Control Learning to Use the FX Family for Positioning Control
FX Positioning Control Systems 4 - 27
4.2.3 Program example
The following programming example is a hybrid program for FX 2N(C) and FX 3G /FX 3GC /FX 3GE /FX 3S /
FX
3U(C) controllers to be used with an E500 Series inverter. For the communication between PLC and
inverter, CH 1 is used.*
*When a FX 3GE main unit is used, the communication channel of the built-in Ethernet is CH1. When a com-
munication expansion board or a communication special adapter is connected to the PLC, that communica-
tion channel becomes CH2. Please modify the example program accordingly.
The travel path and operation pattern are shown below.
In the program below, the section "Controlling the inverter to move in the forward or reverse rotation
direction" drives the inverter in the forward or reverse direction. When the forward rotation limit
(X001) or reverse rotation limit (X000) is reached, the operation stops. For details on connecting the
hardware for testing, refer to the appropriate product manual.
Before programming, there are several parameter settings that must be set to the inverter and PLC.
Setting communication parameters for the E500 Series inverter
While all operations are stopped (i.e. - the RUN indicator on the E500 is OFF), use the MODE key ,
UP/DOWN keys and the SET key to change and/or confirm the following
parameters:
423010da.eps
Fig. 4-16: Configuration and positioning pattern for the E500 Series inverter
Parameter
No.
Parameter item Set value Setting contents
Pr.79 Operation mode selection 0
External operation mode is selected when power is
turned ON.
Pr.117 Communication station number 00 to 31 Up to eight inverters can be connected.
Pr.118 Communication speed 96 9600 bps (default)
Pr.119 Stop bit / Data length 10
Data length: 7-bit
Stop bit: 1-bit
Pr.120
Parity check presence/absence selec-
tion
2 Even parity present
Pr.122 Communication check time interval 9999 Communication check suspension
Pr.123 Waiting time setting 9999 Set with communication data
Pr.124 CRLF presence/absence selection 1 With CR, without LF
Tab. 4-19: Communication parameters
Reverse rotation
limit (X000)
Forward rotation
limit (X001)
General purpose
motor
Reverse rotation
(H0FA bit2 is ON)
Acceleration
time (Pr.7)
Forward rotation
(H0FA bit1 is ON)
Speed
(Hz)
Accel/Decel reference
frequency (Default: 60Hz)
1s
(Pr.20)
Running frequency
(H0ED  40 Hz)
Time
(s)
Deceleration
time (Pr.8)
1s
MODE
SET