(1) The number of word table divisions (1 word)
The maximum of the number of table divisions is 10. If a larger
value than 10 is set up, it will become an initial setting error.
(2) I/O Code / I/O address (2 word / 1 class)
I/O code is specified from the high byte of 1st word. A top address is
specified from low byte of 1st word and 2nd word.
(3) Address offset of Modbus protocol (1 word / 1 class)
It specifies where the top address of I/O of (2) is mapped. (H0000 to HFFFF)
« Note »
(2), (3) of parameter prepares the number set up with the number of table divisions.
When you use software ver. 1.0, or when you do not use I/O mapping, please set the number of bit table divisions
as H0000. When the number of table divisions is 0, the parameter of I/O classification, I/O No., and address
offset is unnecessary.
Execution of initial setting
Set execution flag (t+0) after s parameter and the sending data area configured.
« Note »
Max. number of modbus slave modes is 8 modules per CPU module. (Both ports can work as Modbus slave in 8
modules)
Setting completion
(1) Completed properly
H0000 is stored in return code area (s+0), and completion flag(t+1) goes on. The status register XICx and TIIx goes
on. Status LED MBx is ON, and LED LNK, HPx and MSx are off.
(x = 1 : port 1, 2 : port 2)
(2) Error
Error flag (t+2) goes on, and error code will be stored in return code area. Please eliminate the error factor by
referring to the return code in section “6.4.5 Error detection in modbus slave mode”
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