User`s manual

42
FX3U Series Programmable Controllers
User’s Manual - MODBUS Serial Communication Edition
7 MODBUS Standard Commands
7.1 MODBUS Standard Commands Support List
0x08
Diagnosis
0x0C
Return Bus
Communication
Error Count
Read number of
detected
communication
errors
- ✘
Subsection
7.11.8
0x0D
Return Bus
Exception Error
Count
Read number of
detected
exception
conditions
- ✘
Subsection
7.11.9
0x0E
Return Slave
Message Count
Read number of
received requests
- ✘
Subsection
7.11.10
0x0F
Return Slave No
Response Count
Read "No
Response"
counter of the
slave
- ✘
Subsection
7.11.11
0x10
Return Slave NAK
Count
Read NAK
counter of the
slave
- ✘
Subsection
7.11.12
0x11
Return Slave Busy
Count
Read "Busy"
counter of the
slave
- ✘
Subsection
7.11.13
0x12
Return Bus
Character Overrun
Count
Read "Bus
Character
Overrun" counter
of the slave
- ✘
Subsection
7.11.14
0x0B
Get Communication
Event Counter
Read
communication
event counter
- ✘ Section 7.12
0x0C
Get Communication
Event Log
Read
communication
event log
- ✘ Section 7.13
0x0F Write Multiple Coils
Write multiple
binary (R/W)
devices
1 to 1968
points
✔ Section 7.14
0x10
Write Multiple
Registers
Write multiple 16
bit (R/W) registers
1 to 123
points
✔ Section 7.15
0x11 Report Slave ID
Read Slave ID
code data
- ✘ Section 7.16
0x16 Mask Write Register
Manipulate slave
register with AND
Mask / OR Mask
1 point ✔ Section 7.17
0x17
Read/Write Multiple
Registers
Read/Write
multiple 16 bit
(R/W) registers
Read:1 to
125
pointsWrite:
1 to 121
points
✘ Section 7.18
Command
Code
Subcommand
Code
Command Name Details
Accessible
Devices per
Message
Broadcast Reference