DL205 Analog Manual, 7th Edition Rev. D
7-4
Chapter 7: F2-04THM, 4-Channel Thermocouple Input
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Special Placement Requirements (DL230 and Remote I/O Bases)
It is important to examine the configuration if a DL230 CPU is being used. As can be seen
in the section on Writing the Control Program, V-memory locations are used to capture
the analog data. If the module is placed in a slot so that the input points do not start on a
V-memory boundary, the program instructions aren’t able to access the data. This also applies
when placing this module in a remote base using a D2-RSSS in the CPU slot.
To use the V-memory references required for a DL230 CPU, the first input address assigned
to the module must be one of the following X locations. The table also shows the V-memory
addresses that correspond to these X locations.
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X
Data is split over three locations, so instructions
cannot access data from a DL230.
X
X0 X20 X40 X60 X100 X120 X140 X160
V
V40400 V40401 V40402 V40403 V40404 V40405 V40406 V40407
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