Modbus Mapping For Write Register Services Fc6, Fc16, Fc22, Fc23 - WAGO 750-8207 Manual

290 MODBUS – CODESYS 2
10.4.4.4

MODBUS Mapping for Write Register Services FC6, FC16, FC22, FC23

The table below outlines the mapping for MODBUS-writing, register-oriented
services.
• FC6 – Write Single Register,
• FC16 – Write Multiple Registers,
• FC22 – Mask Write Register, not for information and configuration registers
• FC23 – Read/Write Multiple Registers.
Table 209: MODBUS Mapping for Write Register Services FC6, FC16, FC22, FC23
MODBUS Address
(hexadecimal values
in parentheses)
0 ... 999
(0x0000 ... 0x03E7)
1000 ... 1999
(0x03E8 ... 0x07CF)
2000 ... 4095
(0x07D0 ... 0x0FFF)
4096 ... 12287
(0x1000 ... 0x2FFF)
FC6, FC16, FC23
only,
not FC22
Manual
Draft version 1.2.1 from 2017-09-13, valid from FW Version 02.06.20(09)
IEC 61131 Description
Address
%IW1000 ... MODBUS Output:
%IW1999 1000 PFC input registers/words in the
2 kB MODBUS output process image in
the PII.
No access to: MODBUS Output:
%QW1000 ... Inhibited MODBUS area for register-
%QW1999 oriented write access.
Register-oriented write services in this
area are acknowledged by the MODBUS
slave with the MODBUS exception code
"ILLEGAL DATA ADDRESS" (0x02).
Inhibited MODBUS area for register-
oriented write access.
Register-oriented write services in this
area are acknowledged by the MODBUS
slave with the MODBUS exception code
"ILLEGAL DATA ADDRESS" (0x02).
No IEC 61131 Information and Configuration Registers:
address Not all MODBUS addresses in this area
are valid and not all registers can be
written to.
Valid MODBUS addresses are described
in the Section "WAGO MODBUS
Registers".
Access to invalid addresses are
acknowledged by the MODBUS slave
with the MODBUS exception code
"ILLEGAL DATA ADDRESS" (0x02).
WAGO-I/O-SYSTEM 750
750-8207 PFC200 CS 2ETH RS 3G