Operator`s manual

21X MICROLOGGER OVERVIEW
OV-13
Parameter 3 specifies the channel on which to
make the first measurement. Parameter 6
specifies the Input Storage location in which to
store the first channel measurement. If multiple
repetitions are specified, measurements from
sequential channels are stored in adjacent input
locations beginning with the location specified in
Parameter 6. For Example, if there are 5
repetitions and the first measurement is stored
in location 3, the final measurement will be
stored in location 7.
Parameter 5 specifies the Input Storage
location in which to find the reference
temperature in this case location 1 where the
panel temperature is stored. Parameters 7 and
8 are the multiplier and offset which convert the
measurement to engineering units. The TC
instructions return the measurement in units of
o
C when a multiplier of 1 and an offset of 0 are
used.
The first example was explained one keystroke
at a time. Instead of listing each keystroke, the
following format shows the display after a value
is keyed in; the use of the A key to advance to
the next entry is not shown. This format is
similar to that used in the PC208 EDLOG
program.
If you have followed through sample program 1
and edited the program in OV4.2, your 21X
now has a 5 second execution interval and
Instruction 17 in Table 1. To continue with this
example you can simply advance (key A)
through the execution interval and Instruction 17
and check the entries against the following
listing. The new entry starts with the second
instruction in the table.
Sample Program 2
Instruction Parameter Description
(Loc.:Entry) (Par.#:Entry)
*1 Enter Program Table 1
01:5 5 second execution interval
01:P17 Measure panel temperature
01:1 Store temp. in location 1
02:P14 Measure thermocouple temp. (differential).
01:1 1 repetition.
02:1 Range code (5mV, slow).
03:5 Input channel of TC.
04:1 TC type: copper-constantan.
05:1 Reference temp is stored in location 1.
06:2 Store TC temp in location 2.
07:1 Multiplier of 1 (degrees C)
08:0 Offset of 0.
03:P92 If Time
01:0 0 minutes into the interval.
02:60 60 minute interval.
03:10 Set Output Flag (Flag 0).
The 21X is programmed to measure the thermocouple temperature every 5 seconds. The If Time
Instruction, 92, sets the Output Flag at the beginning of each hour. Next, the instructions for time
and average are added.