87
12 Interface
87
Interface
Chapter
12
■Modbus-RTU
■RS-485 transmission delay time
Set delay time when the master device cannot process a response from the F325.
■RS-485 transmission delay time setting method
1. Select setting mode 4.
→ (three times)
2. Select "RS-485 transmission delay time".
Press the key three times.
Set the RS-485 transmission delay time using the
(numerical value input) and
(shift) keys, and confirm it with the key.
3. Press the key to return to the indicated value display.
■Function code for Modbus
Function code details are described.
This chapter describes the function field and the data field that changes with the function code.
The actual message frame consists of the address field, function field, data field, and the error-
check field, and is transmitted in this order.
Function code list
Code Function name Command
01 (0x01) Read Coils Read coils
02 (0x02) Read Discrete Inputs Read discrete inputs
03 (0x03) Read Holding Registers Read holding registers
04 (0x04) Read Input Register Read input register
05 (0x05) Write Single Coil Write in single coil
06 (0x06) Write Single Register Write in single holding register
15 (0x0F) Write Multiple Coils Write in multiple coils
16 (0x10) Write Multiple Registers Write in multiple holding register
08 (0x08) Diagnostics Diagnostic mode
11 (0x0B) Get Comm Event Counter Read event counters
12 (0x0C) Get Comm Event Log Read communication events
17 (0x11) Report Slave ID Read slave ID information
3.5 char ＋ transmission delay time [mSec]
Frame Frame
Transmission delay time
(00 to 99)
To Next Page
Loading...
Need help?
General
