Dicon VX500 Instructions d'exploitation télécharger pdf (Page 17)

October 20, 1998

Switch Control 17

Switch Control

Figure 13 illustrates the following sample control sequence for a 1

N simplex switch.

1. Following power-up, the switch returns to reset position. After the initialization period,

the device is ready to receive instructions.

2. The user brings STROBE high, brings RESET high to enable channel selection, and

sets the desired channel address. The user applies a strobe pulse, sending the BUSY

line high while the switch moves into alignment with channel 6. The BUSY line returns

to low when the switch operation is complete and the device is ready to accept new

instructions.

3. With the RESET line still high, the user changes the channel address and applies

another STROBE pulse, the BUSY line goes high while the switch moves into align-

ment with channel 2.

4. Finally, the user brings RESET low and applies another STROBE pulse. The device

disregards the channel address inputs. The BUSY line goes high while the switch

returns to the reset position.

Figure 13:

Sample Control Sequence

Power Up

Auto Reset

Not

Valid

Read

00001

Channel 6

Ready

Not

Valid

Read

00101

Not

Valid

Channel 0

Reset

Ready Ready

Channel 2

Reset

Request

Not

Valid

Ready

Channel

Reset

+12 VDC

STROBE

RESET

BUSY

OUTPUT

CHANNEL

SWITCH

FUNCTION

Off

Not

Valid

1234

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 23 24

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Dicon VX500 Instructions d'exploitation Page 17

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