Mitsubishi Electric FX5 User Manual page 103

■Operation of instruction execution complete flag
When communication with an inverter is completed, the instruction execution completed flag (SM8029) turns ON, and
remains ON for 1 scan.
SM8029 indicates completion of IVDR instruction communication as shown below, when M0, M2 are OFF and M1 is ON.
If inverter communication instruction ends normally, instruction execution normal end flag (Page 98) turns ON
simultaneously with SM8029.
(1) IVWR instruction is not driven
M0 (OFF)
IVWR
(2) IVDR instruction is driven
M1 (ON)
IVDR
(3) IVCK instruction is not driven
M2 (OFF)
IVCK
■Processing of communication errors
Communication errors include those that occur for all serial communication functions (parity error, overrun error, framing error)
and those that occur during communication with the inverter. A serial communication error results if either occurs.
Serial communication error Device No.
Operation
Serial communication error Device No.
code
Error code
You can create the following program for the corresponding instruction to check the inverter communication error code.
Program example
Start command
X0
M0
Instruction abnormal completion
M102
Precautions for program creation
■Communication protocol setting
If protocol of communication settings (Page 95) for the serial port to be used is not set to "Inverter Communication,"
inverter communication instructions cannot be used.
■Using inverter communication instruction together with another instruction
A serial port using any other communication (such as RS2 instruction) cannot use inverter instruction and predefined protocol
support instruction. (Page 212 Combined Use of Serial Communication)
(s1) (s2) (s3)
(s1) (s2) (s3)
(s1) (s2) (d1)
CH1
SM8500
ON (ON maintained)
SD8500
7010H: Parity error, overrun error or framing error
76**H: Inverter communication error (Page 121)
IVWR (s1) (s2) (s3)
MOV SD8500
Operation of the instruction
execution completed flag
(n) (d)
SM8029: OFF
(n) (d)
SM8029: ON
(n) (d)
SM8029: OFF
CH2 CH3
SM8510 SM8520
SD8510 SD8520
SET M0
K1 M100
SET M50 M50
Instruction error check
D50 D50
RST M0
CH4
SM8530
SD8530
4 INVERTER COMMUNICATION
4.8 Programming
4
101