Sensoray 421 Manual do Utilizador descarregar pdf (Página 25)

Sensoray Model 421 Instruction Manual Page 23

Relay Interface Procedures

FUNCTION ReadRelay% (bankAdrs%, chan%)

‘****************************************************************************

‘ Read relay channel input state.

‘

‘ Imports:

‘ chan% = relay channel in range 0:23.

‘ bankAdrs% = address of relay group (RELAY0 or RELAY2).

‘

‘ Exports:

‘ ReadRelay% = relay channel input state (TRUE or FALSE).

‘****************************************************************************

adrs% = bankAdrs% + chan% \ 8 ‘ Compute relay channel port address

bitMask% = 2 ^ (chan% AND 7) ‘ Compute relay channel bit mask

readRelay% = ((INP(adrs%) AND bitMask%) <> 0) ‘ Read relay input state

END FUNCTION

SUB writeRelay (bankAdrs%, chan%, state%)

‘****************************************************************************

‘ Program relay output.

‘

‘ Imports:

‘ chan% = relay channel in range 0:23.

‘ bankAdrs% = address of relay group (RELAY0 or RELAY2).

‘ state% (boolean): TRUE = relay on, FALSE = relay off.

‘****************************************************************************

Index% = chan% \ 8 ‘ Compute relay%() index and port address

bitMask% = 2 ^ (chan% AND 7) ‘ Compute relay channel bit set mask

invMask% = bitMask% XOR 255 ‘ Compute relay channel bit reset mask

‘ Update relay port output image

relay%(Index%) = (relay%(Index%) AND invMask%) OR (state% AND bitMask%)

OUT bankAdrs% + Index%, relay%(Index%)‘ Write new state to relay channel output register

END SUB

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Sensoray 421 Manual do Utilizador Página 25