Change the parameter under "Request special I/O
parameter change" (#L_ExIOSpParmChg).
#L_ExIOSpParmChg

Request Special I/O Parameter Change
This variable uses the CH specified in the I/O driver settings
as the 4-bit configuration information to request the special I/O
parameter change.
a: CH1 special I/O parameter change
request
c: CH2 special I/O parameter change request
e: CH3 special I/O parameter change request
g: CH4 special I/O parameter change request
You can also read the previous settings using the Operation bits
below.
b: CH1 special I/O parameter read request
d: CH2 special I/O parameter read request
f: CH3 special I/O parameter read request
h: CH4 special I/O parameter read request