svn://software/hardware/LC4D/100218/docs/LC4D_MAN.doc
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Page 13 of 20
PLC Expansion Location Assignment General Example
Slot 0
Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
Output Space
Slot 15
Slot 16
Slot 17
Slot 18
Slot 19
A
Input Space
Slot 0
Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
Slot 15
Slot 16
Slot 17
Slot 18
Slot 19
A
B
Oak
Inputs
Oak
Analog Inputs
Oak
Outputs
Oak
Analog Output
Slot 20
Slot 20
Slot 47
Slot 47
B
The remaining example shows how specific devices will map into the PLC under certain conditions.
PLC Expansion devices have a variety of memory requirements, which are summarized in the following chart
for devices used in the example.
PLC I/O Slot Requirements
Function
Input
Debounce
Slots Used
Input Non-
Debounce Slots
Used
Output
Debounce Slots
Used
Ouput Non-
Debounce Slots
Used
Total Available
15
33
15
33
Oak
Digital and Analog I/O
1
5
1
1
PLCADD1616
Digital I/O
1
0
1
0
ADD4AD4DA
Analog I/O
0
4
0
4
Example 2 illustrates I/O assignments on a system that has an Oak main PLC, a PLCADD1616 plugged into
“PLC ADD 1”, and an ADD4AD4DA to “PLC ADD 2". Note that the ADD4AD4DA is an ADC/DAC
expansion card and is assigned in the non-debounce / group area since it does not require debounce.
PLC Expansion Example 2
Slot 0
Slot 1
Slot 2
Slot 2
Slot 3
Slot 4
Slot 5
Slot 16
Slot 17
Slot 18
Slot 19
Slot 15
Slot 21
Slot 22
Slot 23
Input Space
PLCADD1616
Oak Inputs
Slot 0
Slot 1
Slot 2
Slot 2
Slot 3
Slot 4
Slot 5
Slot 16
Slot 17
Slot 18
Slot 19
Slot 20
Slot 15
Slot 21
Slot 22
Slot 23
Output Space
Slot 47
PLCADD1616
Oak Outputs
Oak
Analog Output
ADD4AD4DA
Oak
Analog Inputs
ADD4AD4DA
Slot 47
Slot 20
In this example, it does not matter which "PLC ADD" port each device is plugged into because the different I/O
requirements cause exclusive placement in the I/O map.
Содержание OAK
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