Port Configuration Option Codes - Campbell Measurement and Control Module CR10 Operator's Manual

SECTION 9. INPUT/OUTPUT INSTRUCTIONS
Pulse duration, initiated by a program control
instruction, can be set for each control port
(Table 12-2). Instruction 20 does not pulse the
port, it only sets the duration. If Instruction 20
is not used to set the duration, the pulse
command will result in a 10 ms pulse.
Instruction 20 has two 4 digit parameters. Each
digit represents one control port. The code (0-
9) entered as the digit determines what effect
command 20 has on the corresponding port.
TABLE 9-5. Port Configuration Option Codes
Code Function
0 Set port low
1 Set port high
2 Toggle port
3 Pulse duration 1 ms
4 Pulse duration 10 ms
5 Pulse duration 100 ms
6 Pulse duration 1 s
7 Configure as output
8 Configure as input
9 Leave unchanged
Duration of pulse on subsequent pulse port
command in Program Control Instruction.
PARAM. DATA
NUMBER TYPE
01: 4
02: 4
Input locations altered: 0
*** 22 EXCITATION WITH DELAY ***
FUNCTION
This instruction is used in conjunction with
others for measuring a response to a timed
excitation using the switched analog outputs. It
sets the selected excitation output to a specific
value, waits for the specified time, then turns off
the excitation and waits an additional specified
time before continuing execution of the
following instruction. Analog power is turned off
during delay after excitation to drop power to 3
mA.
If the only requirement is the delay of program
execution, the excitation on time (parameter 2)
can be set to zero and the off time delay
(parameter 3) can be used.
9-10
DESCRIPTION
C8, C7, C6, C5 option
codes
C4, C3, C2, C1 option
codes
PARAM. DATA
NUMBER TYPE
01: 2
02: 4
03: 4
04: FP
Input locations altered:
*** 23 BURST MEASUREMENT ***
FUNCTION
Instruction 23 will repeatedly make a voltage
measurement on a series of single-ended or
differential channels, applying excitation if desired.
The measurement units are millivolts prior to
scaling. The measurements saved can be those
made immediately upon execution of the
instruction or grouped around a specified trigger
condition. The results of the measurements may
be stored in Input Storage or the raw A/D data can
be sent out the serial port. The minimum sample
time per channel is 1.333 ms (i.e., one channel
can be sampled at a maximum rate of 750 Hz).
MEASUREMENT
The voltage measurement must use the fast
integration time of 272 µs. Differential
measurements are made with a single
integration. The noise level on a fast single-
ended or a differential measurement with 1
integration is 3 µV RMS. Thus, only the 25 mV
and greater voltage ranges are practical (range
codes 13-15).
Excitation is always supplied from excitation
channel 1. The excitation voltage in millivolts is
entered in Parameter 9. If excitation is not
desired, enter 0 for Parameter 9.
Three options are available for the first digit in
Parameter 4.
0 - Trigger on first measurement channel.
1 - Trigger on Digital Control Port 1.
2 - Trigger on first measurement channel, set
Digital Control Port high when trigger is met
and low when measurements have
finished.
DESCRIPTION
Excitation channel
number
Delay time in
hundredths of a
second that excitation
is on
Delay time in hundredths
of a second after
excitation is turned off
Excitation voltage in
millivolts
0