Campbell Scientific AM25T 25-Channel Solid State Multiplexer - Manual (Page 28)

Appendix A. Single-Ended Measurements
instruction has one repetition. If the instruction has two repetitions, then every
other Input Location will be over written. This effect is illustrated in Table A-
2. The program fragment in Example A-4 generated this effect.
The multiplexer control instructions are not included in the
example program fragment. NOTE
TABLE A-2. Values in Input Storage; with Input Location Index and
without Step Loop Index Instruction
Pass 18 19 20 21 22 23
First TC_1
TC_2
Second TC_3 TC_4
Third TC_5 TC_6
By adding Instruction 90 (Step Loop Index) with a value of two, the
measurements will be stored sequential in Input Storage. See Table A-3 and
the program fragment in Example A-5.
The multiplexer control instructions are not included in the
example program fragment. NOTE
TABLE A-3. Values in Input Storage; with Input Location Index and
Step Loop Index Instruction
Pass 18 19 20 21 22 23
First TC_1
TC_2
Second TC_3 TC_4
Third TC_5 TC_6
Example A-3. Single Ended Thermocouples, Input Location Not Indexed
01: Beginning of Loop (P87)
1: 0
Delay
2: 6 Loop Count
02: Thermocouple Temp (SE) (P13)
1: 2
Reps
2: 21 2.5 mV 60 Hz Rejection Range
3: 1 SE Channel
4: 1 Type T (Copper-Constantan)
5: 1 Ref Temp (Deg. C) Loc [ RefTemp ]
6: 18 Loc [ TC_1 ]
7: 1.0 Mult
8: 0.0 Offset
03: End (P95)
A-6