Common Items In Inverter Communication Instructions - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Inverter Communication
9.3

Common Items in Inverter Communication Instructions

9.3.1 Inverter communication types (IVCK to IVMC)
Execute inverter communication using the following applied instructions.
There are six types of applied instructions, "IVCK (FNC270) to IVMC (FNC275)", depending on the data
communication direction and parameter reading/writing direction.
Inverter
communication
instruction
Instruction
IVCK(FNC270)
IVDR(FNC271)
IVRD(FNC272)
IVWR(FNC273)
IVBWR(FNC274)
IVMC(FNC275)
*1. Only available for FX
9.3.2 Function and operation
1. Communication start timing
At the rising edge (OFFON) of the drive condition, the PLC starts communication with an inverter.
Even if the drive condition turns OFF during communication with an inverter, the PLC executes
communication until the last instruction.
When the drive condition is always ON, the PLC executes communication repeatedly.
2. Simultaneous driving of instructions and communication processing
1) Driving instructions at the same time
- Two or more IVCK (FNC270) to IVMC (FNC275) instructions can be programmed, and driven at the
same time.
- When two or more instructions are driven at the same time in the channel used for communication, the
latter inverter communication instruction in the program is executed after the current communication
with the inverter has finished.
M8000
RUN
monitor
E-98
S  S
1 2
Inverter Inverter
station instruction
number code
Only 16-bit type is applicable.
DIVCK (32-bit type), IVCKP
(pulse operation type) and
DIVCKP (32-bit pulse operation
type) are not applicable.
Function
Monitors operations of an inverter.
Controls operations of an inverter.
Reads a parameter from an inverter.
Writes a parameter to an inverter.
*1
Writes parameters to an inverter all at once.
Controls operations and monitors operations of an
inverter with a single command
and FX
3U 3UC
FNC273

IVWR
FNC271

IVDR
FNC270

IVCK
9 Creating Programs (FX3S, FX3G, FX3GC, FX3U, FX3UC)
 S  n
3
Read/ Used
Write channel
Read value storage destination
or value written to inverter
PLCs.
  
  
  
9.3 Common Items in Inverter Communication Instructions
K1:ch1
K2:ch2
Control direction
PLC  inverter
PLC  inverter
PLC  inverter
PLC  inverter
PLC  inverter
PLC  inverter
(1)
M8151
ONOFF
(2)
M8151
ONOFF
(3)
Detailed
explanation
9.4
9.5
9.6
9.7
9.8
9.9