Campbell Hausfeld SDM-CAN Manual Do Utilizador

 

'\\\\\\\\\\\\\\\\\\\\\\\\\ CANBUS CONSTANTS ////////////////////// 

'------------------- Physical Network Parameters ----------------- 

Const TQUANTA = 4                 ')Set SDM-CAN to 250K 
Const TSEG1 = 5                   ')Network speed 
Const TSEG2 = 2                   ') 

'---------------------- Data Frame Parameters -------------------- 

'___________________________CANbus Block1_________________________ 

Const CANREP1 = 1                 'Repetitions 
Const ADDRESS1 = 0                'SDM address of SDM-CAN Module 
Const DATATYPE1 = 1               'Collect and retrieve data values   
Const STARTBIT1 = 1               'Start position in data frame 
Const NUMBITS1 = -16              'Number of bits/value – for interrupt  
Const NUMVALS1 = 1                'Number of values  
Dim CANBlk1(CANREP1)              'Dimensioned source 
Dim NewData 

'\\\\\\\\\\\\\\\\\\ ALIASES & OTHER VARIABLES ////////////////// 

Alias CANBlk1(1) = Accel_Pedal    'Assign an alias name to CANBlk1(1) 

'\\\\\\\\\\\\\\\\\\\\\\\\\\\ PROGRAM /////////////////////////// 

BeginProg                            'Program begins here 

'MainSequence 
Scan(PERIOD,P_UNITS,0,0)       'Scan once every 1 Secs, non-burst 

'__________________________ CAN Blocks __________________________ 

'Read status of digital I/O port, return value to NewData variable 

   ReadIO(NewData,7,&B1) 

'When digital I/O port is high retrieve data from CAN network  

   If NewData > 0 Then 

CanBus(CANBlk1(),ADDRESS1,TQUANTA,TSEG1,TSEG2, 217056000, 
DATATYPE1,STARTBIT1,NUMBITS1,NUMVALS1,1,0) 

   EndIf 
Next Scan                      'Loop up for the next scan 

EndProg                              'Program ends here

 

Due to current system constraints the ID parameter must be entered 
directly into the CanBus instruction. 

It is also possible to have a SlowSequence Scan for low priority CANbus 
measurements that are not needed at the rate of the primary scan interval. The 
CR9000 or CR5000 tags on measurement instructions from the slow sequence 
scan to the normal scan as time allows. 

Please refer to the CR9000 or CR5000 on-line help for a more detailed 
explanation of the SlowSequence instruction.