20
SI-I/O User Guide
Issue Number: 3
This parameter controls the logic for all the digital inputs on the module.
The I/O Read Word (Pr
S.01.010
) reflects the state of digital I/O 1 - 8. Each bit matches the value of the state parameter for the respective digital input
or output so the bit value for the digital inputs will be the state of the actual input before any inversion selection is applied. The bit value for the digital
output will include the state inversion if selected in the invert parameter for the output.
The table below shows how the bits correspond to each function.
Digital I/O 1-4 are the standard I/O that are compatible with IEC61131-2 logic levels. When the channel mode is set to zero, the I/O is configured as a
digital input. When the channel mode is set to one, the I/O is configured as a digital output.
S.01.008
Digital I/O Logic Polarity
Minimum
0
Maximum
1
Default
1
Units
Type
8 Bit User Save
Update Rate
Background read
Display Format
None
Decimal Places
0
Coding
RW, TE
Value
Text
Description
0
Negative Logic
Negative Logic
1
Positive Logic
Positive Logic
S.01.009
Open Collector Output
Minimum
0
Maximum
1
Default
0
Units
Type
8 Bit User Save
Update Rate
Background read
Display Format
None
Decimal Places
0
Coding
RW, TE
Value
Text
Description
0
Push-pull
Push-pull output
1
Open Collector
Open Collector output
S.01.010
I/O Read Word
Minimum
0 (Display
00000000)
Maximum
255 (Display
11111111)
Default
0
Units
Type
16 Bit Volatile
Update Rate
Background read
Display Format
None
Decimal Places
0
Coding
RO
Bit
7
6
5
4
3
2
1
0
Terminal
T11
T9
T8
T7
T5
T4
T3
T2
Terminal
description
Digital
Input 8
Digital
Input 7
Digital
Input 6
Digital
Input 5
Digital
I/O 4
Digital
I/O 3
Digital
I/O 2
Digital
I/O 1
S.01.011
T2 Digital I/O 1 Mode
S.01.012
T3 Digital I/O 2 Mode
S.01.013
T4 Digital I/O 3 Mode
S.01.014
T5 Digital I/O 4 Mode
Minimum
0
Maximum
1
Default
0
Units
Type
8 Bit User Save
Update Rate
Background read
Display Format
None
Decimal Places
0
Coding
RW, TE
Value
Text
Description
0
Digital Input
Digital Input
1
Digital Output
Digital Output