Topological/State RAM Addressing of the Modules
Original instructions
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Analog Modules
NOTE: With M340 PLCS that have firmware 2.4 or later, you can access the modules either via topological or State RAM addresses. Please refer to Memory Tab.
The following table shows the Modicon X80 analog module objects that can be mapped to topological or State RAM addresses.
NOTE: State RAM does not apply to BMEAH•0•12 modules.
Module reference
Topological address
State RAM address
BME AHI 0812
%IW rack.slot.channel, channel [0,7]
-%IWStart address ... %IWStart address + 7
BME AHO 0412
%QW rack.slot.channel, channel [0,3]
-%MWStart address ... %MWStart address + 3
BMX AMI 0410
%IW rack.slot.channel, channel [0,3]
-%IWStart address ... %IWStart address + 3
BMX AMI 0800
%IW rack.slot.channel, channel [0,7]
-%IWStart address ... %IWStart address + 7
BMX AMI 0810
%IW rack.slot.channel, channel [0,7]
-%IWStart address ... %IWStart address + 7
BMX AMM 0600
%IW rack.slot.channel, channel [0,3]
%QW rack.slot.channel, channel [4,5]
-%IWStart address ... %IWStart address + 3
and
-%MWStart address ... %MWStart address + 1
BMX AMO 0210
%QW rack.slot.channel, channel [0,1]
-%MWStart address ... %MWStart address +1
BMX AMO 0410
%QW rack.slot.channel, channel [0,3]
-%MWStart address ... %MWStart address + 3
BMX AMO 0802
%QW rack.slot.channel, channel [0,7]
-%MWStart address ... %MWStart address + 7
BMX ART 0414
%IW rack.slot.channel, channel [0,3]
-Value: -%IWStart address ... %IWStart address + 3
-Cold junction: -%IWStart address + 4
BMX ART 0814
%IW rack.slot.channel, channel [0,7]
-%IWStart address ... %IWStart address + 7
-Cold junction, ch 0-3: %IWStart address + 8
-Cold junction, ch 4-7: %IWStart address + 9
For additional information please refer to Special Conversion for Compact I/O Modules.