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MODBUS – CODESYS 2
9.4.4.2
MODBUS Mapping for Write Bit Services FC5, FC15
The table below outlines the mapping for the MODBUS-writing, bit-oriented
services:
•
FC5 – Write Single Coil
•
FC15 – Write Multiple Coils
Table 198: MODBUS Mapping for Write Bit Services FC5, FC15
MODBUS Address
(hexadecimal values
in parentheses)
0 ... 6143
(0x0000 ... 0x17FF)
6144 ... 12287
(0x1800 ... 0x2FFF)
12288 ... 65535
(0x3000 ... 0xFFFF)
750-8208 PFC200 CS 2ETH RS CAN DPM
IEC 61131
Description
Address
%IX1000.0 ...
MODBUS Output:
%IX1383.15
6144 PFC input bit variables in the first
384 registers/words (768 bytes) of the
2kB MODBUS output process image in
the PII.
%QX1000.0 ...
MODBUS Output:
%QX1383.15
MODBUS-only area for bit-oriented
write access.
Bit-based write services for this area are
acknowledged by the MODBUS slave
with the MODBUS exception code
"ILLEGAL DATA ADDRESS" (0x02).
%MX0.0 ...
Maximum bit-addressable flag area:
%MX3327.15
53248 bit flags (6.5 kB);
the actual addressable flag area depends
on the current memory arrangement in
CODESYS.
Version 1.1.0, valid from FW Version 02.06.20(09)
WAGO-I/O-SYSTEM 750
Manual