Campbell Scientific SDM-CAN Datalogger to CANbus Interface - Manual (Page 43)

SDM-CAN Datalogger-to-CANbus Interface
;Retrieve Data from CAN network B
3: SDM-CAN (P118)
1: 01
SDM Address
2: 4 Time Quanta
3: 5 Tseg1
4: 2 Tseg2
5: 1024 ID Bits 0..10 (-- for 11-bit CAN ID)
6: 7680 ID Bits 11..23
7: 12 ID Bits 24..28
8: 2 Rx, unsigned int, LSB 1st
9: 33 Start Bit No.
10: 16 No. of Bits
11: 1 No. of Values
12: 2 Loc [ Eng_1 ]
13: 0.125 Mult
14: 0.0 Offset
;Retrieve Data from CAN network B
8: SDM-CAN (P118)
1: 01
SDM Address
2: 4 Time Quanta
3: 5 Tseg1
4: 2 Tseg2
5: 768 ID Bits 0..10 (-- for 11-bit CAN ID)
6: 7680 ID Bits 11..23
7: 12 ID Bits 24..28
8: 1 Rx, unsigned int, MSB 1st
9: 49 Start Bit No.
10: 8 No. of Bits
11: 1 No. of Values
12: 3 Loc [ Throttl_1 ]
13: 0.125 Mult
14: 0.0 Offset
*Table 2 Program
02: 0.0000 Execution
Interval (seconds)
*Table 3 Subroutines
End Program
4. Programming CRBasic Dataloggers to use the
SDM-CAN
This chapter describes how to program the CR5000/CR9000X and older
CR9000 dataloggers, using CRBASIC language, to control the SDM-CAN
interface. Similar principles can be followed for newer CRX000 dataloggers
that include the SDM-CAN instruction in their operating system.
4.1 General Principles
Some newer dataloggers use the CRBASIC programming language. CRBASIC
incorporates an instruction which is virtually identical to P118, described in
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