Campbell SDM-CAN Manual descarregar pdf (Página 42)

SDM-CAN Datalogger-to-CANbus Interface

7: 0 ID Bits 24..28

8: 1 Rx, unsigned int, MSB 1st

9: 1 Start Bit No.

10: 16 -- No. of Bits

11: 1 No. of Values

12: 10 Loc [ RxTC_1 ]

13: 1.0 Mult

14: 0.0 Offset

;end of interrupt subroutine

3: End (P95)

End Program

3.5.5 Using the Group Trigger

The SDM-Group Trigger controls SDM devices that support the Group Trigger

protocol, including the SDM-CAN. All Group Trigger devices are triggered to

make simultaneous measurements, the data is then retrieved by using the

appropriate instruction.

For the SDM-CAN, this instruction is can be used in a vehicle where more than

one CANbus network is present. An example of using the group trigger is

shown below.

;{CR23X}

;

*Table 1 Program

01: 1 Execution Interval (seconds)

;Initiate Group Trigger

1: SDM-Group Trigger (P110)

;Retrieve Data from CAN network A

2: SDM-CAN (P118)

1: 00 SDM Address

2: 4 Time Quanta

3: 5 Tseg1

4: 2 Tseg2

5: 204 ID Bits 0..10 (-- for 11-bit CAN ID)

6: 81 1 ID Bits 11..23

7: 7 ID Bits 24..28

8: 23 Tx, real IEEE4, MSB 1st

9: 1 Start Bit No.

10: 32 No. of Bits

11: 1 No. of Values

12: 1 Loc [ AC_Comp_1 ]

13: 1.0 Mult

14: 0.0 Offset

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 75 76

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Campbell SDM-CAN Manual Página 42