Communication
FPΣ User's Manual
246
Reception done judgment time
The process for receiving a message is complete after all data has been received and the
time given in this table has been reached.
Baud rate Reception done judgment time
2400
≈13.3ms
4800
≈6.7ms
9600
≈3.3ms
19200
≈1.7ms
38400
≈0.8ms
57600
≈0.6ms
115200
≈0.3ms
Supported commands
Executable
instructions for
master
Code
(decimal)
Name (Modbus original) Name for FPΣ
Modbus
Reference
F146_READ 01 Read Coil Status Read Y and R Coils 0X
F146_READ 02 Read Input Status Read X Input 1X
F146_READ 03 Read Holding Registers Read DT 4X
F146_READ 04 Read Input Registers Read WL and LD 3X
F145_WRITE 05 Force Single Coil Write Single Y and R 0X
F145_WRITE 06 Preset Single Register Write DT 1 Word 4X
Cannot be issued 08 Diagnostics Loopback Test –
F145_WRITE 15 Force Multiple Coils Write Multiple Ys and Rs 0X
F145_WRITE 16 Preset Multiple Registers Write DT Multiple Words 4X
Cannot be issued 22 Mask Write 4X Register Write DT Mask 4X
Cannot be issued 23 Read/Write 4X Registers Read/Write DT 4X
Modbus references and FPΣ addresses
Modbus reference
Name Decimal address
1)
Hexadecimal address
2)
FPΣ address
000001–001184 0000–049F Y0–Y73F
Coil
002049–006144 0800–17FF R0–R255F
Input
100001–101184 0000–049F X0–X73F
Holding register
400001–432765 0000–7FFC DT0–DT32764
300001–300128 0000–007F WL0–WL127
Input register
302001–302256 07D0–08CF LD0–LD255
1)
Beginning with 0
2)
Beginning with 1
REFERENCE
For details on Modbus settings and communication using the F145_WRITE and F146_READ
commands, please refer to the online help of FPWIN Pro.
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