Campbell Scientific CR9000X Measurement and Control System User Manual
Page 247
Section 7. Measurement Instructions
7-23
Parameter
Enter
SDMCAN PARAMETERS
DataType
Continued
32
Set SDM-CAN's internal switches. The code is stored in the array specified in
the Dest parameter and is entered in the form of ABCD.
Switch Code
Description
D
5
Self-reception; self -test. The SDM-CAN will perform
a successful transmission even if there is no
acknowledgment from an external CAN node. Frames
received correctly from an external node are
acknowledged. SDM-CAN will receive its own
transmission.
D
6
Normal; self-test. The SDM-CAN will perform a
successful transmission even if there is no
acknowledgment from an external CAN node. Frames
received correctly from an external node are
acknowledged.
D
7
Not
defined.
D
8
Not
defined.
D
9
Leave switch setting unchanged.
33
Read SDM-CAN's internal switches. Place results in the array specified in
the Dest parameter.
61
“High Speed Block Mode” version of DataType 1,
Retrieve data; unsigned integer, most significant byte first.
62
“High Speed Block Mode” version of DataType 2,
Retrieve data; unsigned integer, least significant byte first.
63
“High Speed Block Mode” version of DataType 3,
Retrieve data; signed integer, most significant byte first.
64
“High Speed Block Mode” version of DataType 4,
Retrieve data; signed integer, least significant byte first.
65
“High Speed Block Mode” version of DataType 5,
Retrieve data; 4-byte IEEE floating point number; most significant byte
first.
66
“High Speed Block Mode” version of DataType 6,
Retrieve data; 4-byte IEEE floating point number; least significant byte
first.
StartBit
The StartBit parameter is used to identify the least significant bit of the data value
within the CAN data frame to which the instruction relates. The bit number can range
from 1 to 64 (there are 64 bits in a CAN data frame). The SDM-CAN adheres to the
ISO standard where the least significant bit is referenced to the right most bit of the
data frame. If a negative value is entered, the least significant bit is referenced to the
left most bit of the data frame.