SECTION 9. INPUT/OUTPUT INSTRUCTIONS

of each of the 16 control ports. Up to 16 SDM- CD16AC's may be addressed, making it possible to control a maximum of 256 ports from the first three datalogger control ports.

For each Rep, the 16 ports of the addressed SDM-CD16AC are sent according to 16 sequential input locations starting at the input location specified in parameter 3. Any non-zero value stored in an input location activates (connects to ground) the associated SDM- CD16AC port. A value of zero (0) deactivates the port (open circuit). For example, assuming 2 Reps and a starting input location of 33, OUTPUT 1 through 16 of the first SDM- CD16AC are set according to input locations 33 through 48, and OUTPUT 1 through 16 of the second SDM-CD16AC are set according to input locations 49 through 64. See the SDM- CD16AC manual for detailed instructions and examples.

PARAM.

DATA

 

NUMBER

TYPE

DESCRIPTION

01:

2

Reps (# of CD16AC

 

 

modules sequentially

 

 

addressed)

02:

2

Starting Address (base

 

 

4: 00..33)

03:

4

Starting input location

*** 105 SDI-12 RECORDER ***

Instruction 105 allows data to be collected from a SDI-12 sensor. A single Control Port is connected to the SDI-12 sensor data line; the SDI-12 ground should be connected to a "G" terminal on the CR10 wiring panel. The CR10 may also be used as the 12 volt power supply for sensors. If multiple SDI-12 sensors are used, each sensor requires a separate Instruction 105. Instruction 105 is only in standard PROMs OS10-1.1 and OS10-1.2.

PARAM.

DATA

 

NUMBER

TYPE

DESCRIPTION

01:4 ADDRESS (0-9)

02:

2

COMMAND (Table 1)

03:

2

PORT (1-8)

04:

4

INPUT LOC.

05:

FP

MULT

06:

FP

OFFSET

Input locations altered: 0-9 (SDI-12 sensor dependent)

9-18

Intermediate Locations required: 9

PARAMETER 1. ADDRESS

Enter the address of the SDI-12 sensor (0-9). Non-standard addresses may be used entering the appropriate ASCII code.

PARAMETER 2. COMMAND

Enter a number to select the command to be sent to the SDI-12 sensor. Usually 0 is entered to select the M command. The following Standard SDI-12 commands are supported by the CR10:

TABLE 9-6. SDI-12 Command Codes

ENTRY

COMMAND DESCRIPTION

O

M

Initiate Measurement

1..9

M1..M9

Additional

 

 

Measurement

 

 

commands specified

 

 

by the SDI-12 sensor

10

V

Initiate Verify

 

 

sequence

11

I

Send Identification

The result of a M, M1-M9, or V command sequence is numerical data, stored in an input location. The response to the I command is text information, which is written directly to Final Storage regardless of the Output Flag's state. The *7 mode of the datalogger cannot be used with this type of data.

PARAMETER 3. PORT

Enter the CR10 control port connected to the SDI-12 sensor data line. Any port 1-8 (C1-C8) may be used. Default port is C8.

PARAMETER 4. INPUT LOCATION

Input location where the returned data is stored. If multiple values are returned from the SDI-12 sensor they are stored in sequential input locations beginning at the specified location.

ERRORS

If the CR10 receives either an incorrect response or no response is received from a SDI-12 sensor, the CR10 will retry the operation. If, after the retries, a valid response has not been received, the CR10 will store a - 99999 in the input location specified in Parameter 4. Only the first location will be