AutomationDirect DL205 - Special Placement Requirements (DL230 and Remote I;O Bases)

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
3
7
F2-04THM
V40401--V40402
BSLBSM
X
2
0
V40400V40403
Correct!
16pt
Output
8pt
Output
32pt
InputInput
8pt16pt
Input
Y0
--
Y17
Y20
--
Y27
X0
--
X17
X20
--
X57
X60
--
X67
Slot 0Slot 1Slot2 Slot 3Slot 4
X
2
7
X
3
0
X
5
7
MSB
X
4
0
X
4
7
X
5
0
LSB 10404V20404V
Data is correctly entered so input points start on a
V-memory boundary address from the table below.
16pt
Output
8pt
Output
8pt
InputInput
32pt16pt
Input
Y0
--
Y17
Y20
--
Y27
X0
--
X17
X20
--
X27
X30
--
X67
F2-04THM
V40402
BSLBSM
X
4
0
X
6
0
X
4
7
X
5
0
V40401
BSLBSM
X
2
0
X
3
7
X
2
7
X
3
0
Incorrect
Slot 0Slot 1Slot2 Slot 3Slot 4
MSB
X
7
7
V40403
X
6
7
X
7
0
LSB
X
5
7
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