IAI America PCON-CFA - Manual (Page 264)

4. SCON-CA
256
z Field I/O format (No.90 FMIO)
Addresses in the PLC are assigned in units of 16 points (2 bytes) based on the node address set in the
controller and the occupied bytes in each operation mode.
By changing the setting of parameter No. 90, data elements can be swapped within a boundary of two
words or less in units of bytes during communication using the I/O areas of the PLC.
Value set in
parameter No. 90
Contents
0
Data exchange is not performed. The data is sent directly to the PLC.
(Refer to “Example i”.)
1
The host bytes are exchanged with slave bytes in the host words and
slave words. (Refer to “Example ii”.)
2
In the case of word register, the host words are exchanged with the
slave words.
(Refer to “Example iii”.)
3 (Factory setting)
The host bytes are exchanged with slave bytes in the host words and
slave words. In addition, the upper word and lower word are swapped
for word resisters. (Refer to “Example iv”.)
(Example i) Set value = “0” z indicates ON, while c indicates OFF
SCON
Input
resister
Hexadecimal
data
PLC:
Output
CH
Hexadecimal
data
SCON
Output
resister
Hexadecimal
data
PLC:
Input
CH
Hexadecimal
data