User manual

Chapter 4 AMCI Module Addressing
4-3
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Addressing the 1700 as a Single Transfer Module
Once a 1731 or 1741 is configured correctly, the processor reads position and tachometer
data with single transfers. To use this data, you must know the memory locations in the input
image table associated with the module.
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PLC-5Input Table:
The characters “I:” followed by a three digit number. The
first two digits are the I/O rack number, followed by the I/O
group number.
Addressing Shortcuts
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2-slot address:
16 bit transfers only. Position data at I/O Group address. Because
of A-B backplane interface IC is designed primarily for block
transfer use, 2-slot single transfers will not work in all systems.
Check for proper function before using this mode.
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1-slot address:
16 bit transfer:Position data at odd numbered I/O Group.
32 bit transfer:Position data at even numbered I/O Group.
Tachometer data at odd numbered I/O Group.
Because of A-B backplane interface IC is designed primarily for
block transfer use, 32 bit transfers with 1-slot addressing will not
work in all systems. Check for proper function before using this
mode.
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½-slot address:
Always base address on the slot the PC Board plugs into.
16 bit transfer:Position data at even numbered I/O Group.
32 bit transfer:Position data at even numbered I/O Group.
Tachometer data at odd numbered I/O Group.
Addressing Examples
The following are examples of module addressing for 2-slot, 1-slot and ½-slot
configurations. The PLC-5 addresses for block and single transfers are also shown.
In the following figures, the module is placed in a single slot pair. See chapter 3, pg. 3-1,
Installing the Module for more information.
2-Slot Addressing
Rack Number:00
I/O Group Numbers:4
Module Slot Number:1
BT Address:0041
Single Position Addr:I:004
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0 1 2 3 4 5 6 7
I/O Rack Number 0
I/O Group
Number
Module Slot Numbers
Figure 4.2 2-Slot Address Example