Details Of Related Devices - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

Details of Related Devices

The following devices are used in MODBUS serial communication.
The devices of "For FX3 compatibility" operate in the channel which specifies by the SM/SD for FX3 compatibility in
communication setting.
Instruction execution complete
This device checks whether the execution of the instruction is completed.
Only for FX5
CH1 CH2 CH3
SM8029
R: Read
SM8029 is also used as the execution completed flag for other instructions (such as positioning instructions).
When using SM8029, provide the contact just under the instruction whose execution completion is to be
checked.
Precautions
Do not turn ON with program or engineering tool.
This device does not turn OFF even if normal communication is restored. The device is cleared when the power supply is
turned from off to on, reset, set from STOP to RUN, or the next ADPRW instruction is executed.
During MODBUS communication
This device checks if MODBUS serial communication is being executed.
Only for FX5
CH1 CH2 CH3
SM8800 SM8810 SM8820
R: Read
Precautions
Do not turn ON with program or engineering tool.
The device is cleared when the power supply is turned from off to on, reset, or set from STOP to RUN.
MODBUS communication error
This device checks if an error occurs during MODBUS serial communication.
For FX3 compatibility
CH1
SM8402
R: Read
Precautions
Do not turn ON with program or engineering tool.
This device does not turn OFF even if normal communication is restored. The device is cleared when the power supply is
turned from off to on, reset, set from STOP to RUN, SM50 (Error Detection Reset Completion) is turned on, or the next
ADPRW instruction is executed.
For FX3 compatibility
CH4 CH1 CH2
For FX3 compatibility
CH4 CH1 CH2
SM8830 SM8401 SM8421
CH2
SM8422
Description
Turns on if the processing of the instruction is completed.
Description
Turns on when the instruction is started until the instruction
execution complete flag is turned on during MODBUS
serial communication.
Description
Turns on when an error occurs during MODBUS serial
communication.
R/W
R
R/W
R
R/W
R
7 FUNCTION
37
7.3 Related Devices
7